INSTRUCTION MANUAL 1M23N29602 R Digital Proportional R/C System
Thank you for purchasing a Futaba 4GRS-2.4GHz system. Before using your 4GRS-2.4GHz system, read this manual carefully in order to use your R/C set safely. After reading this manual, store it in a safe place. IN NORTH AMERICA Please feel free to contact the Futaba Service Center for assistance in operation, use and programming. Please be sure to regularly visit the 4GRS Frequently Asked Questions web site at www.futaba-rc.com/faq/.
2. Exportation precautions: (a) When this product is exported from the country of manufacture, its use is to be approved by the laws governing the country of destination for devices that emit radio frequencies. If this product is then re-exported to other countries, it may be subject to restrictions on such export. Prior approval of the appropriate government authorities may be required.
Table Of Contents For Your Safety As Well As That Of Others..........................8 Explanation Of Symbols................................................................8 2.4GHz System Precautions..........................................................8 Receiver Mode Precautions..........................................................8 Operation Precautions...................................................................9 NiMH/NiCd Battery Handling Precautions.................................
Initial Set-Up ........................................................................37 Preparations (Transmitter)...........................................................37 Receiver Type Check (RX MODE)...........................................37 Receiver Type Change & How To Link ..................................38 Throttle Mode Check.................................................................41 Trims Initial Set-Up....................................................................
Channel 3/4 "CH3/CH4"................................................................71 Channel 3/4 Position Steering Dual Rate/ Throttle ATL "D/R ATL"...............................72 Steering D/R, Throttle ATL Rate Select Switch Dial Function "SW/ DIAL"....................................73 Selection of functions operated by dial, digital trim and switch Brake Mixing "BRAKE MIX"........................................................76 Front and rear independent brake control for 1/5GP car, etc.
Alarm Setting if Tx is left switched ON Item which displays the basic menu screen in katakana characters for Japanese use Throttle stick adjustment HOME screen display mode setting Adjuster "ADJUSTER"...............................................................113 Steering wheel and throttle trigger correction Telemetry "TELEMETRY"..........................................................115 Telemetry/ Log Screen Map....................................................116 Telemetry Function ON/OFF.......
For Your Safety As Well As That Of Others Use this product in a safe manner. Please observe the following safety precautions at all times. Explanation Of Symbols For Your Safety As Well As That Of Others The parts of this manual indicated by the following symbols are extremely important and must be observed. Symbols Danger Explanation Indicates a procedure which could lead to a dangerous situation and may cause death or serious injury if ignored and not performed properly.
Operation Precautions Warning Do not operate outdoors on rainy days, run through puddles of water or use when visibility is limited. Do not operate in the following places. -Near other sites where other radio control activity may occur. -Near people or roads. -On any pond when passenger boats are present. -Near high tension power lines or communication broadcasting antennas. Interference could cause loss of control.
NiMH / NiCd / LiFe Battery Handling Precautions (Only when NiMH/NiCd /LiFe batteries are used) Warning Never plug the charger into an outlet of other than the indicated voltage. Plugging the charger into the wrong outlet could result in an explosion or fire. For Your Safety As Well As That Of Others Never insert or remove the charger while your hands are wet. You may get an electric shock. Do not use the T4GRS transmitter's battery, as the receiver's battery.
When the system will not be used for any length of time, store the system with NiMH/NiCd batteries in a discharged state. Be sure to recharge the batteries prior to the next time the system is used. If the batteries are repeatedly recharged in a slightly discharged state, the memory effect of the NiMH/NiCd battery may considerably reduce the capacity. A reduction in operating time will occur even when the batteries are charged for the recommended time. (After discharge to 1cell E.V.
Before Using Features -Telemetry system The T4GRS transmitter has adopted the newly developed bidirectional communication system "T-FHSS" -2.4GHzSS (Spread Spectrum) radio communication system Frequency channel setting is unnecessary: Channel shifting takes place within the 2.4GHz band automatically. This system minimizes the interference from other 2.4GHz systems. Before Using -Model memory for 40 models Model names can use up to 10 letters, numbers, and symbols, so that logical names may be used.
-Throttle speed (SPEED) Sudden stick operation on a slippery road surface will only cause the tires to spin and the model to not accelerate smoothly. By setting the throttle speed function, operation can be performed smoothly and easily. It also suppresses battery consumption. -Steering speed (SPEED) When you sense that the steering servo is too fast, etc., the servo operating speed (direction that suppresses the maximum speed) can be adjusted.
Set Contents After opening the box, first check if the contents conform to the following. The contents depend on the set as shown below. Transmitter Receiver T4GRS R304SB or R304SB-E(Built-in Antenna for EP car models) Before Using Receiver switch * It is not attached to R304 SB-E set. Miscellaneous Mini screwdriver * It is used for receiver. Instruction manual - If any of the set contents are missing, or you have any questions, please contact your dealer.
Transmitter T4GRS Nomenclature Digital Dial 1 (DL1) (default CH4) Switch 2 (SW2) (default CH3) Antenna Digital Trim 4 (DT4) (default ATL) Digital Trim 3 (DT3) (default dual rate) Switch 1 (SW1) LCD screen Digital Trim 2 (DT2) (default throttle trim) Hook Power&Display switch Steering stick Digital Trim1 (DT1) (default steering trim) － Button ＋ Button Before Using Throttle stick Jog Button Edit Button Grip Handle Antenna cannot be removed. Damage will occur if the antenna is forcibly removed.
Battery Replacement Method (4 AA Size Batteries) Load the four batteries in accordance with the polarity markings on the battery holder. Battery cover Battery Replacement Method 1 Remove the battery cover from the transmitter by sliding it in the direction of the arrow in the figure. 2 Remove the used batteries. Slide battery cover while pressing here. Before Using 3 Load the new AA size batteries. Pay very close attention to the polarity markings and reinsert accordingly.
When Using The Optional Battery When using an optional rechargeable battery, replace the battery as described below. -Always use the optional HT5F1800B or FT2F1700BV2/2100BV2 rechargeable battery. -The type of power source used must be set by system setting. -When the transmitter will not be used for a long time, remove the battery. Battery Replacement Method 1 Refer to the previous description and remove the transmitter battery cover.
When Charging the Optional Battery Charging a NiMH Battery AC outlet (Example: When using the HT5F1800B with the special charger) 1 Plug the transmitter cord of the special charger in- Charger to the charging jack on the rear of the transmitter. 2 Plug the charger into an AC outlet. Transmitter charging LED 3 Check that the charging LED lights. Before Using The charging time when charging the HT5F1800B battery with the optional special charger is approximately 15 hours.
Warning Never plug it into an outlet other than the indicated voltage. Plugging the charger into the wrong outlet could result in an explosion or fire. Do not insert and remove the charger when your hands are wet. It may cause an electric shock. Always use the special charger or a quick charger for digital proportional R/C sets to charge a digital proportional R/C set NiMH battery. Caution When the charger is not in use, disconnect it from the AC outlet.
Power & Display Switch The power switch and display switch of the T4GRS are integrated. In the PWR ON mode, radio waves are transmitted and in the DISP mode, model data, settings can be checked without transmitting radio waves. In addition, some setting menus may only be displayed in the DISP mode. Power ／ DISP Switch PWR ON LCD screen Radio waves are being transmitted Before Using UP MIDDLE OFF When you do not run, turn OFF.
Display When Power Switch Is Turned On Power switch turned on Battery voltage display Telemetry function :ON/OFF Receiver -> Transmitter: The reception strength is shown. Model number ST :Steering trim display TH :Throttle trim display D/R :Steering D/R display The current receiver mode is displayed. ATL :Throttle ATL display Telemetry data Servo operation of each channel can be checked.
Stick Operation CH1 CH2 (CH1: Steering stick, CH2: Throttle stick,) Throttle Stick Function: Controls the speed of the model as well as the direction of travel - forward or reverse. Steering Stick Function: Turns the model right or left. Before Using Servo operation of steering channel (CH1)can be checked. Ser vo operation of throttle channel (CH2) can be checked.
Switch Dial Operation CH3 CH4 (CH3: Switch SW2, CH4: Dial DL1) The three-position switch SW2 will result in the servo arm moving to three different positions when operated. Note that this function cannot be assigned to the spring return switch SW1. Rotating the Dial (DL1) will proportionally control a servo on CH4. T he SW2 switch and DL1 dial can be assigned to either function.
Digital Trim Operation DT1 DT2 (Initial settings: DT1: Steering trim, DT2: Throttle trim,) Operated by the lever: Push the lever to the left or right (up or down) The current position is displayed on the LCD screen. Steering trim display Before Using Throttle trim display DT2 DT1 • Each step is indicated by a tone. • When the trim exceeds the maximum trim adjustment range, the beep will change and the servo will not move any farther.
Stick Lever Head Adjustment The length of the lever head of the steering and throttle sticks can be adjusted. Adjustment 1 Unlock lever head "A" by turning it counterclockwise. Lever head Ｂ Lever head Ａ 2 Adjust the head to the length best for you, then lock the Before Using heads by turning lever head "A" clockwise and lever head "B" counterclockwise. Stick Mounting Angle Adjustment The mounting angle of the throttle and steering sticks can be adjusted. Setting 1 Loosen the two set screws.
Stick Tension Adjustment Make this adjustment when you want to change the steering stick or throttle stick spring tension. Adjustment 1 Remove the battery from the transmitter. 2 Using Phillips screwdriver, as shown in Before Using a figure, four screws are removed, and a rear case is removed. • Don't touch internal electronic components. Rear case 3 Turn the adjusting screw using a small Phillips screwdriver such as a watch- maker's screwdriver.
Mechanical Throttle Stick Stroke Adjustment Make this adjustment when you want to reduce the throttle stick range at the full power or brake/reverse positions. Stick stroke adjustment 1 Make this adjustment by turning the adjusting screw above the stick with a Phillips screwdriver. • When the adjusting screw is turned counter clockwise, the stroke is reduced. High side Stroke can be reduced mechanically.
mark (fig-4) is displayed, pressing the (JOG) button. An internal check is performed automatically. When each adjustment point is within a fixed range, correction is performed and "COMPLETE!" (fig-5) is displayed. If an adjustment point is not within a fixed range, correction is not performed and the correction data is not updated. If the stroke is made too narrow, this will cause an error. ADJUSTER THROTTLE N5 5 N7 3 BRK FWD COMPLETE! CANCEL Ke y fig-5 In that case, extend the stroke.
MENU2 HOME MENU1 SYSTEM RT CONTRA 0 BK-LHT ALL LHT-TM 10s LHT-PW 15 BATT D RY 4 BUZZER 65 OPE-TM OFF ENG MENU 5 5 Push TH-STK DISP TLMTR 3 (Selection of TH-STK) 4 (Selection of your 4GRS neutral position) Use the (+) and (-) buttons to select either 5:5 or 7:3. • "F10" should be selected only when using a ratchet on the throttle stick. (for GP boats) 5 (Neutral position execution) Press the (JOG) button for about 1 second. A beeping sound is generated and the neutral position is selected.
Changing to Ratchet Type Throttle Stick Changing the throttle stick from the self-centering type to ratchet type that stops at an arbitrary position. (To make this modification, the optional ratchet plate must be purchased.) Adjustment 1 Remove the battery from the transmitter. 2 Using Phillips screwdriver, as shown in a fig- Rear case ure, four screws are removed, and the rear case is removed. Before Using • Don't touch internal electronic components.
About Transmitter Antenna and Receiver About The Transmitter Antenna Antenna A B Antenna Moving Range Warning Before Using Position the antenna vertically to the ground. Position the antenna vertically to the ground. In other positions the operating range may be reduced. Never hold only the antenna. Hold the grip handle. Otherwise, the antenna may be damaged. The antenna position can be changed in the range as shown in figures A and B. However, please do not apply unnecessary force or shock.
Receiver Terminology Antenna Link switch/LED Coaxial cable Connectors 4 :CH4 servo(CH4) 3 :CH3 servo(CH3) 2 :Throttle servo(CH2) 1 :Steering servo(CH1) S.BUS2 :Power /S.BUS2 connector *R304SB-E(for EP Car) has built-in antenna. R304SB The receiver power supply can be connected to the S-BUS2 connector or any of CH1-4.
Installation Receiver and Servo Connections Connect the receiver and servos as shown below. Connect and install the receiver and servos in accordance with "Installation Safety Precautions" on the next page. The figure shown below is an example. The method of connecting the motor controller to the motor and battery depends on the motor controller used. Purchase the motor controller and servos separately. The receiver also depends on the set.
Installation Safety Precautions Warning Receiver (receiver antenna) Do not cut or bundle the receiver antenna wire. Do not bundle the receiver antenna wire together with the motor controller lead wire. Keep the receiver antenna wire at least 1cm away from motor, battery, and other wiring carrying heavy current. Install the receiver antenna holder as closely as possible to the receiver.
Warning Connector Connections Be sure the receiver, servo, battery and connectors are fully and firmly connected. If vibration from the model causes a connector to work loose while the model is in operation, you may lose control . Servo Installation When you install the servos, always use the rubber grommets provided in servo hardware bags. Mount the servos so they do not directly come in contact with the mount.
Warning Electronic Speed Control Install the heat sinks where they will not come in contact with aluminum, carbon fiber or other parts that conduct electricity. If the FET Amp (Electronic speed control) heat sinks touch other materials that conduct electricity a short circuit could occur. This could result in loss of control and damage to the system. Motor Noise Suppression Always install capacitors to suppress noise when electric motors are used.
Initial Set-Up Preparations (Transmitter) Before setting the Transmitter functions, check set the following items first. (Display when power switch turned on) When the power switch is turned on, the currently selected model number is displayed. Check if this number is the model number you want to set-up. To change the model number, use the Model Select function. Turn on the transmitter power. The battery voltage is displayed.
If the receiver used and the RX type settings are different, change the RX type using the "RX MODE" function. Which RX type is set can be checked at the HOME screen. T-FHSS Normal speed T-FH (NORM) T-FHSS High speed T-FH (HIGH) S-FHSS Normal speed S-FH (NORM) S-FHSS High speed S-FH (HIGH) FHSS Receiver Type Change & How To Link Initial Set-Up The first operation described below sets the RX type.
*When using an FHSS (R603GF/R2004F, etc.) or S-FHSS(SFH) system (R2104GF, R204GF-E, etc.) receiver, after the end of setting up to here set the transmitter power switch to OFF and go to "Receivers other than T-FHSS" . 3 Bring the transmitter and receiver to within 50cm of each other (do not allow the antennae to touch) and turn on the receiver power. 4 Move the cursor to "LINK: EXE" by (JOG) button up or down operation.
The telemetry ON/OFF and communication status can be checked at the HOME screen. The reception strength High Low No signal reception Receiver -> Transmitter: The reception strength is shown. - Telemetry function :ON - Receiver ID setting complete - Data receiving sensitivity display - shows that data cannot be received because it is outside the data receiving range or because of the effects of an obstruction or the receiver power is OFF after receiver ID check.
Throttle Mode Check *This function is not available in "TH-STK : F10 mode". The throttle servo travel can be set to 5:5 or 7:3 for throttle stick operation as required by the throttle mode function . F5/B5 Forward side 5:5 F7/B3 Brake side Forward side 7:3 Brake side F5/B5 or F7/B3 Trims Initial Set-Up - Throttle trim (DT2) check On the initial set-up, throttle trim is assigned to the DT2 trim lever. Operate the lever and make sure the marker moves on the TH graph.
- Steering dual rate (DT3) check At initial set-up, steering dual rate (D/R) is assigned to the DT3. Operate the lever and check if the D/R value displayed on the screen changes. After checking D/R, set the steering dual rate to 100%. - Throttle ATL (DT4) check At initial setting, throttle ATL (ATL) is assigned to the DT4. Operate the lever and check if the ATL value displayed on the screen changes. After checking ATL, set throttle ATL to 100%.
Function Map Operation Of Screen In this instruction manual, Edit Buttons are represented by the symbols shown below. The (JOG) button can be operated in the 4 directions up, down, left, and right.
Selecting Items On The Menu Screen The item indicated by the highlighted cursor on the screen is selected. The cursor is moved using the (JOG) button in up or down movements. The cursor movement figure shown below is an example of the MENU 1 screen. However, movement of the cursor is the same in all of the screens. For instance, if the (JOG) button is pressed when the cursor is at the end point (EPA) on the MENU 1 screen, the end point (END POINT) function setting screen appears.
Basic Menu Japanese Katakana Character Display On the system menu, the basic menu screen shown below can be displayed in Japanese katakana characters. Alphabetic characters EXP SPEED TH A.B.S TH ACCEL END POINT TRIM REVERSE D/R ATL FAIL SFE CH3 /CH4 MODEL MDL NAME TH A.B.
Function List Description Of Function Function Abbreviation Function Map 46 Page No RX MODE Receiver type selection/linking with telemetry type T-FHSS system receiver P-37 MODEL Model memory select/ Model memory copy/ Model memory reset P-47 MDL NAME Model memory name set/modify, username set/modify P-50 REVERSE Servo reversing P-52 SUBTRIM Servo center position fine adjustment P-53 END POINT End point adjustment P-54 FAIL SAFE Fail safe, battery fail safe P-57 EXP Steering curve
Function Model "MODEL" Forty model data (data for 40 R/C cars) can be saved in the T4GRS transmitter. This menu selects the model, copies data between models. Model Menu Display The MENU 1 screen is displayed using (JOG) button up, down, left, or right operation at the HOME screen. The display can be switched to the MODEL screen by selecting "MODEL" and using (JOG) button up or down operation.
Model Selection "SELECT" Forty model data (model data for 40 R/C cars) can be saved in the 4GRS transmitter and used when the relevant model data is called. Using the model select function - Display the MODEL screen. 1 (Selection of model select) Move the cursor to "SELECT" using the (JOG) button up or down operation. Move the cursor to select model # with the (JOG) button. 2 (Model #. selection) Select the model number with the (+) or (-) button. "01" ~ "40" are displayed. Model #.
Model Copy "COPY" The contents of the currently selected model data can be copied to another model. Using the model copy function - Display the MODEL screen. 1 (Selection of model copy) Move the cursor to "COPY" using the (JOG) button up or down operation. Move the cursor to "COPY" with the (JOG) button. 2 (Model #. selection) Select the copy destination model number with the (+) or (-) button. "01" ~ "40" are displayed. Model #. 01~40 The copy destination model # with the (+) or (-) button.
Model Reset "RESET" This function resets and initializes the contents of the currently selected model data. However, the adjuster function (ADJUSTER), system setting (SYSTEM), and type of receiver mode (TYPE) are not initialized. Using the model reset function - Display the MODEL screen. 1 (Selection of model reset) Move the cursor to "RESET" using the (JOG) button up or down operation. Move the cursor to "RESET" with the (JOG) button.
Model Name "MDL NAME" This function allows you to assign a ten character name to each model memory and user name.
Servo Reverse "REVERSE" (All channel) This function reverses the direction of operation of the servos related to transmitter steering, throttle, and channel 3 /4 operation. However, when the position set by trim or subtrim shifts from the center, the center becomes the opposite side.
Subtrim "SUBTRIM" (All channel) Use this function to adjust the neutral position of the steering, throttle, channel 3 and channel 4 servos. 90° *Subtrim adjusts the entire range of the servo in the set direction.
End Point Adjuster "END POINT" (EPA) (All channel) Use this when performing left and right end point adjustments, throttle high side/ brake side operation amount adjustment, channel 3 and channel 4 servo up side/ down side operation amount adjustment during linkage. - Correct the maximum steering angle for left and right steering angles when there is a difference in the turning radius due to the characteristics, etc. of the vehicle.
Display to "END POINT" screen by the following method: (HOME screen) (MENU 2 screen) (MENU 1 screen) (END POINT screen) Press Select "END POINT" Press Press Press Setting item selection (Steering and Throttle direction) - The direction (STR LFT and STR RGT) linked with the steering stick is switched. - The direction (THR FWD and THR BRK) linked with the throttle stick is switched.
Throttle (END POINT) adjustment (Preparation) - Before setting the throttle end point adjustment (END POINT), set the throttle ATL (initial setup: DT4) to the maximum throttle angle position 100%. 100 - Select the setting item "FWD" by the (JOG) button up or down operation and make the following adjustments: 1 Throttle (full power) adjustment (HOME screen) Push the throttle stick forward to the full power position and use the (+) or (-) buttons to adjust the throttle angle.
Fail Safe Function "FAIL SAFE" (All channel) Fail Safe Mode (F/S) This function moves each servo to a preset position when the receiver does not receive a clear signal from the transmitter. -When the condition set at "FHSS" is Rx type, fail safe (F/S) can be set only for throttle (TH). Other channels are set to the normal mode. -The fail safe data is transferred from the transmitter to the receiver 10 seconds after the transmitter power is turned on. The data is transferred every 5 seconds after that.
Fail safe mode selection FAIL SAFE screen (Preparation) - Select the channels "MODE" to be set using the (JOG) button up, down, left, or right operation. 1 (Mode selection) Select the mode by (+) or (-) button. (Each channel can be individually set.) 2 When completed, move the cursor to [RT] using the (JOG) button, and return to the MENU1 screen by pressing the (JOG) button. When setting fail safe, set the servo position by the following method.
Exponential Adjustment "EXP" (Steering/ Throttle system) This function is used to change the sensitivity of the servo around the neutral position.
FWD (Throttle Forward Side EXP) BRK (Throttle Brake Side EXP) This function is used to change the sensitivity of the throttle/brake servo/ESC around the neutral position. It has no effect on the servo maximum operation amount. Advice When the course conditions are good and the surface has good grip, set each curve to the + side (faster initial response). When the road surface is slippery and the tyres do not have good grip, set each curve to the - side (gentler initial response).
Throttle brake side EXP adjustment (Preparation) *This function is not available in "TH-STK : F10 mode" - On the EXP screen make the following adjustments: 1 Select the setting item "BRK" using the (JOG) button up or down operation. Use the (+) button to adjust for a faster initial throttle response or use the (-) button for a gentler throttle response. ~ Adjust button Adjust with the (+) and (-) buttons.
Servo Speed "SPEED" (Steering system) This function is used to change the servo speed.
Steering Speed adjustment (Preparation) - On the SPEED screen make the following adjustments: 1 "TURN" direction adjustment On the SPEED screen, Select the setting item STR "TURN" using the (JOG) button up or down operation and use the (+) or (-) buttons to adjust the delay amount. Adjustment range 1~100% (each direction) At 100%, there is no delay. 1% 100% Servo operation is delayed. Adjust button - Adjust with the (+) and (-) buttons.
THR (Throttle Speed) Sudden throttle stick operation on a slippery surface will cause the wheels to spin, resulting in poor acceleration. Setting the throttle speed function reduces wasteful battery consumption while at the same time enabling smooth, enjoyable operation.
Throttle Acceleration "TH ACCEL" (Throttle system) The throttle servo will "jump" to a preset position at its maximum possible speed. Unlike exponential, which adjusts the whole throttle movement into a curve, throttle acceleration simply "jumps" away from neutral and then leaves the remaining response linear. Operation 100% 100% Servo travel - Operation near the throttle trigger neutral position becomes an abrupt rise. - The forward and brake sides can be set separately.
Throttle acceleration adjustment (Preparation) - On the TH ACCEL screen make the following adjustments: 1 (Forward acceleration amount adjustment) Select the setting item FWD "RATE" using the (JOG) button up or down operation and use the (+) and (-) buttons to adjust the acceleration amount.
*This function is not available in "TH-STK : F10 mode". A.B.S. Function "TH A.B.S" (Throttle system) When the brakes are applied while cornering with a 4 Wheel Drive or other type of vehicle, understeer may occur. This understeer can be eliminated and cornering improved using this function. Operation - When the brakes are applied, the throttle servo will pulse intermittently. This will have the same effect as pumping the brakes in a full size car.
- DELY : Delay Sets the delay from brake operation to ABS operation. When set to 0%, the ABS function is activated without any delay. At 50%, the ABS function is activated after a delay of approximately 1 second and at 100%, the ABS function is activated after a delay of approximately 2 seconds. - CYCL : Cycle speed Sets the pulse speed (cycle). The smaller the set value, the faster the pulse cycle. - TG.
4 (Cycle speed adjustment) CYCL Servo travel Select setting item "CYCL" using the (JOG) button up or down operation. Use the (+) or (-) button to adjust the pulse speed (cycle). CYCL (Cycle) Cycle speed (CYCL) 1 ~ 30 Initial value: 10 Adjustment buttons - Use the (+) and (-) buttons to make adjustments. - Return to the initial value by pressing the (+) and (-) buttons simultaneously (approx. 1 sec). - The smaller the set value, the faster the pulse speed. 5 (Starting point setup) TG.
Fail Safe Unit When the T4GRS is used with the Futaba fail safe unit (FSU), it will operate as described below. However, FSU-1 cannot be used in the high speed mode. - When the FSU is connected to the throttle channel, and the A.B.S. function has been activated, the FSU LED will flash each time the servo operates. The reason for this is that the FSU responds to sudden data changes caused by A.B.S. function pumping operation. It does not mean that the fail safe function is activated.
Channel 3/4 "CH3/CH4" (3/4 channel) The channel 3/4 servo position can be set from the transmitter. When CH3 is assigned to a dial by the switch dial function , this setting is linked to that dial. When CH3/4 is not assigned to a dial, it can be set with this screen. When CH3/4 is assigned to a switch by the switch dial function, you cannot adjust the CH3/4 via the screen.
Steering Dual Rate/ Throttle ATL "D/R ATL" D/R (Steering dual rate) The steering left and right servo travels are adjusted simultaneously. This setting is linked to transmitter DT3. When DT3 is assigned another function, dual rate can be adjusted with this screen. ATL (Throttle ATL) This function decreases the set value when the braking effect is strong and increases the set value when the braking effect is weak. This function is linked to transmitter DT4.
Select Switch Dial Function "SW/ DIAL" Selection of the function to be performed by digital trim (DT1, DT2, DT3, DT4) dial (DL1) and switch (SW1, SW2). - The functions that can be assigned to dial, digital trim and switch are listed on the next page. - The dial and digital trim step amount can be adjusted. (The relationship between set value and step amount is shown in the table on the next page.) - The direction of operation of the servos can be reversed.
Function select switch setting 1 2 (Setting SW selection) Select the SW you want to set using the (JOG) button up or down operation. Adjust button Adjust with the (+) and (-) buttons. SW1 function selection Direction of operation setting (Function setting) Select the function with the (+) or (-) button. -Refer to the list for the abbreviations of the functions. (Changing the SW1 operation system) Select DIR of using the (JOG) button up or down operation.
DL1 SW2 SW1 DT4 DT3 DT2 DT1 Set table functions (SW1) Abbreviation used on setup screen NT-BRK ABS IDLE PRGMIX TH-OFF CH3 CH4 4WS MIX TIMER Function name, etc. Neutral brake function ON/OFF A.B.
*This function is not available in "TH-STK : F10 mode". Brake Mixing "BRAKE MIX" (Throttle, 3rd /4th channel system) This function is used when the front and rear brakes must be adjusted independently such as with a 1/5 scale GP car. This mixing uses the 2nd CH for the rear brakes and the 3rd or 4th CH for the front brakes, or controls the front brakes with the 3rd CH and 4th CH servos, or controls the 2nd CH by independent throttle and controls the rear and front brakes with the 3rd CH and 4th CH.
Brake mixing adjustment 1 (Brake mixing function ON/OFF) Using the (JOG) button, select "MODE" of for CH3 brake and "MODE" of for CH 4 brake. Use the (+) or (-) button and set the function to the "ACT" state. Function ON/OFF (MODE) INH, ACT Select button - Select with the (+) or (-) buttons. "INH" : Function OFF "ACT" : Function ON - When "(4WS>OFF)" is displayed below ABS, the CH3 brake cannot be used if the 4WS function is not set to "ACT".
Programmable Mix "PROG MIX" (All channels) This function allows you to apply mixing between the steering, throttle, channel 3 and channel 4. Additional Functions -When the steering or throttle channel is the master channel (channel that applies mixing), trim data can be added. (Trim mode) - The mixing mode selection.
2 (Master channel) Select setup item "MST" using the (JOG) button up or down operation, and select the master channel by pressing the (+) or (-) button. These setup items are different depcompleted on the master channel. Upper side : LEFT/FWRD/UP Lower side : RGHT/BRAK/DOWN Channel selection (MST) STR, THR, CH3, CH4 Initial value :STR Select button - Select with the (+) or (-) buttons.
4WS Mixes "4WS" (Steering, 3rd channel system) This function can be used with crawlers and other 4WS type vehicles. It is mixing which uses the 1st CH to control the front axle steering and the 3rd CH to control the rear axle steering. OFF (front axle only), reverse steer, same steer, rear axle only and other 4WS type switching is used by selecting SW1 with the function select switch function. If not selected, is displayed. Therefore, select SW1.
1 (4WS type selection) Select the setting item "MODE" using the (JOG) button up or down operation. Use the (+) or (-) and set the function to the "ON" or "OFF" state.
Dual ESC Mixing "DUAL ESC" (Throttle system) This function is mixing used with crawlers and other 4WD type vehicles and uses the 2nd CH to control the front motor controller and the 4th CH to control the rear motor controller. Front drive only, rear drive only, or both front and rear drive can be selected using any programmed DT (digital trim) button. Setting Special mixings When the 4th CH was set to ACT at Brake Mixing or when CPS Mixing is used, Dual ESC mixing cannot be used.
The programmed DT button is used to select the drive type as shown in the figure below. 2 3 (Rear drive travel adjustment) Select the setting item "RATE" by the (JOG) button up or down operation. Use when applying a rotation difference to the front and rear wheels by adjusting the rear (CH4) motor controller travel with the (+) or (-) button. (Mix mode setting) Select the setting item "MXMD" by the (JOG) button up or down operation. Set the mix mode with the (+) or (-) button.
Gyro Mixing "GYRO MIX" (Steering system) This function is a remote gain function which adjusts the sensitivity of the Futaba car rate gyro at the T4GRS side, and is mixing that uses the 3rd CH to adjust the gyro sensitivity. When using the T4GRS and switching between AVCS and NORMAL modes use SW1 with the function select switch function. For a description of the car rate gyro mounting method and handling, refer to the rate gyro instruction manual.
Gyro mixing adjustment (Preparation) - Refer to the gyro instruction manual and connect the gyro to the receiver. When using remote gain, connect gyro sensitivity adjustment to the 3rd CH of the receiver. - When using gyro mixing by switching between the NORM (normal) and AVCS modes, use the function select switch dial function to set the switch to be used. 1 (Gyro mixing setting) Select the setting item "MODE" using the (JOG) button up or down operation.
CPS Mixing "CPS MIX" This function controls the Futaba CPS-1 channel power switch. Normally, when using the CPS-1 unit to power the vehicle lights etc (LED) the CPS1 unit with LED connected is connected to a vacant switch channel and the LEDs are turned on and off by the switch while the vehicle is running. However, when the CPS1 mixing (CPS MIX) function is used, the LED can be turned on and off and flashed in step with steering and throttle operation, as well as being turned on and off by switch.
1 (Control system setup) Operate the (JOG) button up and down and select the setting item "CTRL". Use the (+) or (-) button and select the function.
Throttle Mode "TH MODE" (Throttle system) This menu has the following 4 functions: - Servo neutral mode, which sets the throttle neutral ratio to 7:3 or 5:5 - Idle up, which raises the idling speed when starting the engine to improve engine starting performance of a gasoline car (boat) - Neutral brake, which applies the brakes at the neutral position of the throttle stick - Throttle off (engine cut), which stops the engine of a boat, etc.
Idle-Up "IDLUP" This is a function select switch dial function. The idle up switch must be set. This function is used to improve engine starting performance by raising the idling speed when starting the engine of a gasoline car (boat). It is also effective when you want to eliminate any braking effect when the power is turned off during running, due to the effect of your gear ratio setting and choice of motor when operating an electric car.
Neutral Brake "NTBRK" *This function is not available in "TH-STK : F10 mode". This is a function select switch dial function. The neutral brake function ON/OFF switch must be set. The neutral brake, which applies the brakes at the neutral position of the throttle stick, can be set.
Throttle Off (engine cut) "THOFF" This is a function select switch dial function. The throttle off function ON/OFF switch must be set. The engine cut function stops the engine of a boat, etc. by operating the throttle servo to the slow side by switch regardless of the position of the throttle stick and the setting of other functions (reverse function setting is effective).
ESC Link Function "MC LINK" This is a special function which lets you set the contents of the Link software in Futaba speed controller (ESC), MC960CR, MC940CR, MC950CR, MC851C, MC602C, MC402CR, etc, with variable frequency and other data changes at the T4GRS transmitter. However, some data changes require a PC and Link software. This function is used by connecting ESC directly to the transmitter. The T4GRS power switch is set to the display side.
a -Select the setting item "MODE" using the (JOG) button, and select "READ" by (+) or (-) button. b -Select the setting item "EXEC:+/-" using the (JOG) button, and press the (+) and (-) buttons simultaneously for 1 second or longer. -"COMPLETE!" blinks on the screen and the ESC type and currently set contents are read. - If "LINK ERROR" blinks on the screen, communication with the amp is not being performed normally.
ESC function setup (MC601/602/850/851C, 401/402/950CR) 1 Select the setting item using the (JOG) button. Set the value by (+) and (-) button. The currently set item is displayed here. The item indicated by the highlighted cursor is selected. Setup item selection - Select by the (JOG) button. Adjustment buttons - Use the (+) and (-) buttons to make adjustments. - Return to the initial value by pressing the (+) and (-) buttons simultaneously (approx. 1 sec).
LBP-(LOW BATTERY VOLT) 2.5V~6V DBA-(DEAD BAND) ±2μs~±50μs 2.5V~7.5V for MC950CR Same as Link software Dead Band. This sets the range (neutral point range) over which the ESC does not respond to transmitter throttle operation. The larger the set value, the wider this range. Same as Link software Low Bat Protection This setting cuts off the output to the motor when the main battery voltage drops to the set voltage.
ESC function setup (MC940CR, MC960CR) 1 Select the setting item using the (JOG) button. Setup item selection - Select by the (JOG) button. Set the value by (+) and (-) button. Operate the following (JOG) button and switch between Page1 and Page2 of the setup screen. Adjustment buttons - Use the (+) and (-) buttons to make adjustments. - Return to the initial value by pressing the (+) and (-) buttons simultaneously (approx. 1 sec).
"MIn" which sets the frequency when the load is small, is set to the high frequency side (large value) when extension is desired after straightaways and curves. "MAX" which sets the frequency when the load is large, is set to the high frequency side (large value) when you want to suppress the rise from low speed and when motor heating and commutator roughness are sensed.
Page1 TBM-(TURBO MODE) OFF /LV1 /LV2 Same as Link software Turbo Mode This function sets the turbo mode. More power can be enabled using the turbo mode. Depcompleted on the setting, the motor and ESC may be damaged so use this setting carefully. (Note) When LAU (LEAD ANGLE USE) is off, lead angle setting will not operate even if set to LEV1 or LEV2.
LAU-(LEAD ANGLE USE) ON /OFF Same as Link software Lead Angle Use This function is effective when TBM (Turbo Mode) is LEV1 or LEV2 and sets whether or not lead angle is used. This setting has priority over the TURBO MODE setting. When using in races in which the lead angle function is inhibited by the ESC set this function to OFF. OFF : Lead angle function not used.
Data Transfer "MDL TRANS" This function copies the model memory data of one T4GRS to another T4GRS. Connect the communication port of both T4GRS together with the optional DSC cord for T4PK. Use this function with the T4GRS power switch set to the display side. Note: If the T4GRS battery voltage drops, the display switches to low battery display. Therefore, use this function when there is ample battery capacity remaining.
2 (Select the setting item ) "MODE" by the (JOG) button up or down operation, and select the transfer side and receive side by (+) or (-) button. Mode change button - Use the (+) and (-) buttons to make adjustments. "TRAN" :Data transfer side "RECV" :Data receive side 3 Mode selection "TRANSFER" "RECEIVE" Setup item selection - Select by (JOG) button up or down operation. (Data transfer execution) Select the setting item "EXEC" using (JOG) button up or down operation of both transmitter.
Timer Function "TIMER" Use the timer by selecting one of the three timers UP TIMER, DOWN TIMER, and LAP TIMER. Display "TIMER" screen by the following method: (MENU 1 screen) (HOME screen) (MENU 2 screen) (TIMER screen) Press Press Select "TIMER" Press Press TIMER Disply UP TIMER FUEL DOWN TIMER LAP TIMER UP TIMER function Function Up timer function - This function can be used to count the time between start and stop, etc.
FUEL DOWN TIMER function Fuel down timer function - This function is primarily used to check the refueling time of a gasoline car. (The remaining time is displayed.) - Each time the switch is pressed, the timer is restarted and the set time is reset. The start time becomes the alarm set time. (When counted down to 00 minute 00 second, the down timer becomes an up timer.) - The down timer can be initially started by throttle stick.
Timer screen Timer selection First, select the type of timer at the "TYPE" item. The setup screen varies depcompleted on the type of timer. This figure shows the UP TIMER setup screen. Time display Minute display (m) Second display (s) 1/100 second display Status display RST :Reset state RDY :Throttle stick operation wait RUN :Timer running STP : Timer stopped Racing timer type selection (Preparation) Assign the "TIMER" switch using the function select switch .
Using the up timer (Preparation) Select the setting item "TYPE" using the (JOG) button. Press the (+) or (-) button and select "UP". 1 2 (Alarm time setting) Select the setting item "ALRM" using the (JOG) button and set the alarm time with the (+) or (-) button. (Timer start/stop operation) Start the timer by pressing the switch ("TIMER") set by function select switch function. Adjustment buttons - Use the (+) and (-) buttons to make adjustments.
Using the fuel down timer (Preparation) Select the setting item "TYPE" using the (JOG) button. Press the (+) or (-) button and select "DOWN". 1 2 (Alarm time setting) Select the setting item "ALRM" using the (JOG) button and set the alarm time with the (+) or (-) button. (Alarm start/restart operation) When the switch ("TIMER") set by function select switch function is pressed, the timer starts.
Using the Lap timer (Preparation) Select the setting item "TYPE" using the (JOG) button. Press the (+) or (-) button and select "LAP". Adjustment buttons - Use the (+) and (-) buttons to make adjustments. - Press the (+) and (-) buttons simultaneously (approx. 1 sec) to return to the HOME screen. 1 (Alarm time setting) Select the setting item "ALRM" using the (JOG) button and set the alarm time with the (+) and (-) buttons.
Lap List "LAP LIST" The lap list is displayed when checking the lap memory data (lap times) memorized by lap timer operation. - After the lap timer starts, the lap times are memorized sequentially each time the switch is operated. - If the timer is stopped after the set ALRM time has elapsed, the final lap time is memorized and the total time after the last lap is automatically written. - When the timer was stopped before the set ALRM time has elapsed, the total time is not memorized.
System Functions "SYSTEM" The graphic liquid crystal screen display mode, buzzer sound and menu character mode, etc. can be set. - "CONTRA"---Liquid crystal screen contrast adjustment (20 steps) - "BK-LHT"---Liquid crystal screen backlighting display mode setup (OFF, ON at button operation, normally ON) - "LHT-TM"---Setting of ON time (1~30 secs) when [ON at button operation] was selected above.
System function setup (Setting the liquid crystal backlighting mode) Select the setting item "BK-LHT" using the (JOG) button, and select the mode by pressing the (+) or (-) button. "KEY" :Fixed time backlighting ON after button operated. "ALL" :Backlighting always ON "OFF" :Backlighting OFF SYSTEM [ RT ] CONTRA 0 BK-LHT ALL LHT-TM 10s LHT-PW 15 BATT DRY4 BUZZER 65 OPE-TM OFF ENG MENU TH-STK 5 5 DISP TLMTR When completed, return to the MENU2 screen by pressing the (JOG) button.
Note: If used with the incorrect setting, a normal low battery alarm will not be generated and the system may stop before the battery alarm is generated. The usage time may also become extremely short. "LiFe2" "NiMH5" "DRY4" :Futaba LiFe type battery (FT2F1700BV2 / 2100BV2) :Futaba MiMH type battery (HT5F1800B) :Dry cell battery (alkaline battery recommended) 4 batteries Voltage display When BATT is set to dry cell use DRY4 or LiFe2/NiMH5, the voltage display of the HOME screen changes.
(Changing the menu character display) Select the setting item "MENU" using the (JOG) button, and set the basic menu character display with the (+) or (-) button. "ENG" : Basic menu displayed in Alphabetic character. " " : Basic menu displayed in katakana character. SYSTEM [ RT ] CONTRA 0 BK-LHT ALL LHT-TM 10s LHT-PW 15 BATT DRY4 BUZZER 65 OPE-TM OFF MENU ENG Menu character (MENU) ENG, TH-STK 5 5 DISP TLMTR When completed, return to the menu screen by pressing the (JOG) button.
Adjuster "ADJUSTER" Steering stick and throttle stick neutral position and servo operating angle correction can be applied. This is used when a mechanical offset has occurred for some reason. *However, when correction is made, the set value of all the setting functions must be rechecked. Display the adjuster screen from the system menu.
Throttle adjustment (Preparation) On the ADJUSTER screen, select the setting item "THROTTLE" using the (JOG) button, and press the (JOG) button. Throttle adjustment will not be made if it has been converted to ratchet operation. It is necessary to return to a self neutral. 1 2 (Throttle 5:5 neutral adjustment ) Neutral adjuster is set to 5:5 by the Neutral Adjuster switch.
Telemetry "TELEMETRY" With the telemetry system, the running status can be displayed at the transmitter and also recorded as a data log by mounting various sensor units to the chassis. The telemetry related screens are only displayed when the T4GRS power switch is in the PWR ON position. When the power switch is in the DISP position, the telemetry related screens are not displayed.
Telemetry/Log Screen Map (HOME screen) Press Press (Telemetry Function ON/OFF Screen) p.117 Press The cursor on [RT] The cursor on [RT] Press Press (Sensor Set Screen) p.118 Press Press (Log Data Screen) Function (Log Set Screen) p.
Telemetry Function ON/OFF The telemetry data can be viewed at the HOME screen and telemetry ON/OFF screen. The telemetry function can also be turned on and off at the telemetry ON/OFF screen. The telemetry ON/OFF and communication status can be checked at the HOME screen. The reception strength High Low No signal reception Receiver -> Transmitter: The reception strength is shown. - Telemetry function :ON - Receiver ID setting complete. - Data receiving sensitivity display.
Telemetry Sensor Setting An audible alarm can be generated by the T4GRS from the data from a telemetry sensor. This setting sets alarm ON/OFF and the alarm conditions. Refer to the map on page 116 for the sensor setting (SENS MODE) screen display. There are receiver power source (battery) voltage and external power source (drive battery) voltage settings on page 1 of the sensor setting screen and temperature and speed settings on page 2. Pages 1 and 2 are switched by (JOG) button left or right operation.
Setting external power supply voltage alarm Display page 1 using (JOG) button left or right operation. Select "ALRM" of the "EXT VOLT" setting items using (JOG) button up or down operation, and set alarm ON/OFF with the (+) button or (-) button. "OFF" : Alarm OFF "ON" : Alarm ON by a voltage drop below the specified voltage Select "VOLT" of the "*EXT VOLT" setting items using (JOG) button up or down operation, and set the voltage at which the alarm begins to sound with the (+) button or (-) button.
Setting the gear ratio Display page 2 using (JOG) button left or right operation. Select "RATIO" of the "R.P.M" setting items using (JOG) button up or down operation, and set the location the sensor is to actually measure and the gear ratio of the motor and engine with the (+) button or (-) button. There is no alarm function. When completed, move the cursor to [RT] using the (JOG) button, and return to the HOME screen by pressing the (JOG) button twice. Gear ratio (moderating ratio) 0.
2 (Recording cycle setting) Select the "CYCL" setting item using (JOG) button up or down operation, and set the data acquisition interval from a minimum 0.1 second to a maximum 60 seconds with the (+) button or (-) button. The maximum recordable time set by CYCL is displayed at END TIME shown below. 3 (Count alarm ON/OFF) Select the "ALRM" setting item using (JOG) button up or down operation. To sound an electronic beep at each log count, set "ALRM" to ON with the (+) button or (-) button.
Log Data List The log data list can be called up when checking the log data memorized by logging operation . The maximum log data is up to 200 counts. Refer to the map on page 116 for the log list screen. Example: Receiver power supply voltage log list screen. Displays the type of log data. Displays the log data elapsed time. Displays the data Receiver power supply voltage. Receiver power supply voltage log. Refer to the below map for the display method of each log list screen.
Reference Ratings *Specifications and ratings are subject to change without prior notice. Communication method:One-way operation system Maximum operating range:100m (Optimum condition) For safety: F/S, B-F/S, ID Transmitter T4GRS-2.4G (T-FHSS/S-FHSS/FHSS system, 2 stick type, 4 channels) Transmitting frequency: 2.4GHz band Power requirement: AA Dry cell batteries x 4 (6V) Current drain: 150mA or less Transmission antenna: 1/2λ di-pole Receiver R304SB: (T-FHSS system, 4 channels) Power requirement: 4.
Warning Displays Backup Error LCD screen: If the data is lost for an unknown reason, an audible alarm will sound and "MEMORY BACK UP ERROR" will be displayed on the LCD screen. Audible alarm: Tone will sound (9 times), then repeat. Warning When a backup error is generated, immediately stop using the system and request repair from the Futaba Service Center.
Memory Error LCD screen: If the data in the transmitter is not transferred normally when the power is turned on, an audible alarm will sound and "MAIN MEMORY ACCESS ERROR" will be displayed on the LCD. - To stop the alarm, turn off the power. - Turn the power back on. If the alarm is not generated again, there is no problem.
Optional Parts The following parts are available as 4GRS options. Purchase them to match your application. For other optional parts, refer to our catalog. Transmitter Battery When purchasing a transmitter battery use the following: Part name HT5F1800B (6V/1800mAh) NiMH battery FT2F1700V2(6.6V/1700mAh)/2100BV2 (6.4V/2100mAh) LiFe battery Please do not use the transmitter batteries HT5F1800B and FT2F1700V2/2100BV2 as the receiver's battery.
Federal Communications Commission Interference Statement (for U.S.A.) This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
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