Instruction Manual 24Vdc MAGNAVALVES FOR AIR BLAST MACHINE SHOT FLOW CONTROL Models included in this manual: 576-24 1 kg/min 2 lbs/min 577-24 4.5 kg/min 10 lbs/min 578-24 13.5 kg/min 30 lbs/min 579-24 45 kg/min 100 lbs/min 580-24 90 kg/min 200 lbs/min 590-24 135 kg/min 300 lbs/min Electronics Inc. 56790 Magnetic Drive Mishawaka, Indiana 46545 1-800-832-5653 (Toll Free) Phone: 1-574-256-5001 Fax: 1-574-256-5222 E-mail: sales@electronics-inc.com Made in the USA Website: www.
Table of Contents NOTICE OF REVISION 3 PRODUCT DESCRIPTION 4 THEORY OF OPERATION 4 LOCATION OF ADJUSTMENTS 4 PRELIMINARY ADJUSTMENTS 4 INSTALLATION 5 GENERAL WIRING DIAGRAM 11 GENERAL SPECIFICATIONS 12 BASIC WIRING CONECTIONS 12 PLC W/SERVO AND MAGNAVALVES 13 FRONT PANEL DESCRIPTION 13 OPERATION 13 FRONT PANEL 14 CALIBRATION 16 SPARE PARTS LIST 25 TROUBLE SHOOTING GUIDE 25 MAINTENANCE 25 MAGNAVALVE SELECTOR GUIDE 26 2
NOTICE The revision level (B) of this manual reflects changes made to the 5xx-24 MagnaValves and is applicable to valves with serial numbers 072904-01 and later. Manuals for 5xx-24 MagnaValves with serial numbers prior to 072904-01 can be found at www.electronics-inc.com.
PRODUCT DESCRIPTION The redesigned 5xx-24 Series MagnaValves provide improved performance and reliability with an easier calibration mode. MagnaValves regulate the flow of ferrous media in abrasive blast cleaning and shot peening machines. The 5xx-24 valves have a magnetic control section (upper portion) and a shot flow rate sensing section (lower portion). This system of control makes the valve useful in both Open Loop and Closed Loop systems.
INSTALLATION Mount the MagnaValve in a vertical position with an adequate supply of media above it. Utilizing pipe unions will allow correct alignment of the valve. The MagnaValve is appropriate for use in all three types of air blast machines (direct pressure, suction nozzle and gravity assisted suction nozzle). For direct pressure applications a suitable mechanical grit valve or pinch-tube type of shutoff is necessary to prevent the air pressure from forcing media through the magnetic field.
During operation the equalized air pressure from the pressure pot and the blast line input at the mixing tee allows the MagnaValve to dispense shot into the mixing tee. It is necessary to exhaust the pressure pot at the end of the blast cycle if mechanical valves are not present. Failing to exhaust pressure pot air will force shot through the MagnaValve and down into the mixing tee. It is not required to exhaust the pressure pot at the end of the cycle if mechanical valves are used.
For suction blast applications (valve located on the floor) provide an aspiration air inlet, with a recommended minimum opening of 12mm, to convey the media to the nozzle. Do not restrict this air inlet since it will increase the suction and may pull media through the valve.
Recommendations: 1)Use pipe unions to easily align or remove the MagnaValve. With the provided manual shut-off valve there is no need to drain the pressure pot of shot to clear contaminants that have lodged in the MagnaValve 2)If a negative pressure exists in the shot hopper (i.e. when a pneumatic reclaim system is used to recycle the shot), then allow about 6-inches (15 cm) minimum distance between the top of the MagnaValve and the bottom of the shot hopper.
For gravity-assisted applications (valve located on the top of blast cabinet, below the media hopper) provide an aspiration air inlet, with a recommended minimum opening of 12mm, to convey the media to the nozzle. Do not restrict this air inlet since it will increase the suction and may pull media through the valve.
Notice: 1)Use pipe unions to easily alignment or remove of the MagnaValve. With the provided manual shut-off valve there is no need to drain the pressure pot of shot to clear contaminants that have lodged in the MagnaValve. 2)If a negative pressure exists in the shot hopper (i.e. when a pneumatic reclaim system is used to recycle the shot), then allow about 6-inches (15 cm) minimum distance between the top of the MagnaValve and the bottom of the shot hopper.
GENERAL SPECIFICATIONS FOR 24V SERIES MAGNAVALVES Display Enable Output Adjustments Accuracy Input Enable SENSOR LED’S +24V Power Command input, Valve ON 0 - 10Vdc Zero, Span, Pulse Rate See MagnaValve Datasheet Power Calibration Max. Pressure Media Mode Temp.
PLC w/servo and MagnaValves with built-in Flow Sensors (24Vdc) 250-24 500-24 576-24 577-24 578-24 579-24 580-24 590-24 24Vdc MagnaValves with built-in flow sensors operate with the model FC-24 control. These controls provide the servo loop the function to set and maintain the shot flow rate. They can receive an analog 0-10Vdc signal from a customer supplied remote analog voltage for the set point or they can operate independently without customer computer interface.
FRONT PANEL Zero – Turn adjustment until both LED’s are OFF or blinking. This will set the output signal to zero ± .050 Vdc during no-flow. Gain – This section controls the amplification or gain of the sensor signal. It has been factory set (see label for flow range). If the gain is changed it will be necessary to run a one minute catchand-weigh test to confirm the calibration. The full scale output signal is set to 10 Vdc for calibration flow range. (30lbs/min.
9. CALIBRATION Calibrate the MagnaValve by a catch-and-weigh test. To calibrate allow Media to flow through the valve for a timed period, usually one minute. Weigh the shot and compare the weight to the requested amount. Make fine adjustments at the MagnaValve Gain adjustment knob. Note: Full-scale outputs of the valve for kilogram calibrations or pound calibrations are 10Vdc. Change the flow range from 20lbs/min to 30lbs/min just by typing 30 instead of 20.
Push the button on our special data cable and the following text will appear on your computer: “Press any key to start Terminal Program” Press a key and the following screen will appear.
This Home Screen is an information center. All 24V products using this control board have the ability to store data in 5 different tables. This allows the use of different media types and sizes without recalibration. Table Number: The first line of the screen has the table number in use. It is possible to add special labels to the table, such as S-230, to help identification. Flow Limit: The second line indicates the maximum calibrated flow rate for the valve.
A) Decimal Location: Purpose: To change the resolution of the display. There are 2 modes that toggle when the A key is selected. 1. 999.99 for Air Valves. 2. 9999.9 for Wheel Valves. B) Std/Metric: Purpose: To change the display from lb/min. to kg/min. by pressing the B key. C) Auto Zero on/off Purpose: To activate or deactivate the auto-zero function.
E) Zero Lock on/off Purpose: To activate or deactivate the zero lock feature. This feature will establish and maintain a zero output voltage even if the sensor detects 0-10% signal level. An invalid output signal may occur due to metallic dust accumulation within the sensor. Suppress invalid output signals by turning on the zero lock. Function: Zero Lock on: PA-24 NOT enabled and sensor signal is <10%: the output signal will be 0.0Vdc. PA-24 ENABLED: output signal is normal (i.e.
Press 2 and the following screen appears. A) View Setpoint List Displays the present values stored in the Table. The following screen will appear. This displays the present table name (S-230) and maximum flow setting. These values may be copied and pasted into an Excel spreadsheet or text file for storage or data logging. PWM: The percentage of valve opening. Catch lb/min.: The actual weight caught in one minute. Sensor signal: The percent of measured signal during the catch test.
B) Add Setpoint to List Purpose: Ten additional setpoints may be added for calibration. There are 10 factory setpoints at 10% increments starting at 15% ending with 100%. For more accuracy, use this function to add additional percent points up to 80%. C) Remove Setpoint from List. Purpose: Use this function to remove unwanted setpoints from list. If the valve is very linear D) Edit Catch Values Purpose: Use to change the actual catch weights in the list.
I) Perform Catch Test Purpose: To perform the internal catch and weigh calibration procedure. When pressed the following screen will appear. Y) Backup this Table Purpose: Use this function to copy the data to a backup location after performing a complete calibration on the unit. Z) Restore Table from Backup Purpose: Use this function to restore the calibration data to the last good stored calibration.
A) Table Number: Purpose: Allows the user to change to 1 of 5 tables for data entry. B) Test Duration: Purpose: When selected, this will toggle to 10, 20, 30, and 60-second flow tests. C) Setpoint: Purpose: This selects the setpoint percentage for the testing. This will display the present setpoint from the list starting with the highest. It will show the latest catch weight in the list and the sensor signal measured during the test.
The results of the test are displayed under Results: This will also show the error between the present value in the table and test results. If the test results are valid, select F) to enter the data. F) Enter Catch Data Purpose: Select to enter test results into memory. Failing to select F) after each test results in data loss, because it is not automatically stored in memory after each test. E) Start Remote Test Purpose: Start the selected test remotely using the Enable signal to the valve.
10. SPARE PARTS LIST There are no spare parts for this series of MagnaValves 11. TROUBLE-SHOOTING GUIDE The primary trouble-shooting is accomplished by reporting the status of the 4-LED indicators on the valve. They must all be ON in order for media to flow.
MagnaValve Selector Guide Shot Size S‐70 S‐110 S‐170 S‐230 S‐280 S‐330 S‐390 S‐460 S‐550 S‐660 CCW‐14 CCW‐23 CCW‐28 CCW‐32 CCW‐35 576‐24 Lbs. Kg. 2.2 1 2.2 1 2.2 1 2.2 1 ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ 577‐24 Lbs. Kg. 10 4.5 10 4.5 10 4.5 10 4.5 10 4.5 ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ 578‐24 Lbs. Kg. 33 15 33 15 33 15 33 15 28 13 26 12 25 11 11 25 ‐ ‐ ‐ ‐ 579‐24 Lbs. Kg. 100 45 100 45 100 45 100 45 100 45 100 45 100 45 85 38.5 70 32 ‐ ‐ 590‐24 Lbs. Kg.
