Instruction manual
Table Of Contents
- Range of Applications
- Scope of Supply
- Operation
- Putting into Service
- Setting the Basic Functions
- Functions and Settings
- First Stitch after Power On
- Softstart
- Sewing Foot Lifting
- Sewing Foot Pressure Reduction
- Start Backtack
- End Backtack
- Start and End Backtack with Switch-On and Switch-Off Delay
- Start Ornamental Backtack
- End Ornamental Backtack
- Multiple Backtacking
- Catch backtacking
- Intermediate Backtack
- Backtack Suppression/Recall
- Holding Power of the Stitch Regulator Solenoid
- Reverse Motor Rotation
- Machine Run Blockage (Safety Switch)
- Thread Monitor
- Input Signals
- Parameter 195 = 0 – No Thread Monitor Function
- Parameter 195 = 1 – Model 270 / No Stop / Sewing Foot Down after Seam End
- Parameter 195 = 2 – Model 767, N291 / With Stop / Sewing Foot Up after Seam End
- Parameter 195 = 3 – Model 767, N291 / With Stop / Sewing Foot Down after Seam End
- Parameter 195 = 4 – With Thread Monitor Stitch Counting
- Needle Cooling
- High Lift for Walking Foot
- Manual High Lift for Walking Foot – Speed Limitation
- Maximum High Lift for Walking Foot by Using a Key
- High Lift for Walking Foot Operational Mode Not Stored (Pa. 138 = OFF, Pa. 184 = 0)
- High Lift for Walking Foot Operational Mode Stored (Pa. 138 = ON)
- High Lift for Walking Foot Operational Mode Not Stored with Minimum Number of Stitches (Pa. 138 = OFF, Pa. 184 = >0)
- Speed Limitation
- Switch Stitch Length
- Roller
- Thread Clamp
- Thread Trimming Operation
- Seam with Stitch Counting
- Free Seam and Seam with Light Barrier
- Light Barrier
- Needle Up/Down / Single Stitch
- F1/F2 Function Key Assignment on the V810/V820 Control Panels
- Signal Output Position 2
- Signal Output 512 Impulses per Rotation
- Actuator
- Acoustic Signal
- Master Reset
- Input and Output Function Test
- Error Displays
- Operating Elements of the V810 Control Panel
- Operating Elements of the V820 Control Panel
EFKA DA82GA3312
37
6.17 Thread Monitor
Functions Parameter
Number of thread monitor stitches (cFw) 085
Thread monitor mode (rFw) 195
If the thread monitor function is On (parameter 195 = 1...4), the type of control and the set maximum speed are displayed
for 1 sec. After power On.
Display of maximum speed: Type of control
(e. g. 4000 RPM)
Then the thread monitor status display appears.
Number of thread monitor stitches: Status display
(e. g. 250 stitches)
At this point (after power On) the number of stitches can be regulated in steps of 10 using the +/- key.
The function DED = Direct Input of Speed Limitation is available only after having started sewing or trimming.
6.17.1 Input Signals
The form of input signal helps distinguish which of the bobbins is empty.
Righthand bobbin empty: = Continuous signal (min. 1 sec.)
Lefthand bobbin empty: = Frequency 5 Hz or signal for approx. 100 msec
Lefthand and righthand bobbin empty: = Frequency 10 Hz or signal for approx. 50 msec
6.17.2 Parameter 195 = 0 – No Thread Monitor Function
The thread monitor function is Off.
6.17.3 Parameter 195 = 1 – Model 270 / No Stop / Sewing Foot Down after Seam End
After the bobbin is empty, the bobbin thread counter is activated when receiving an input signal, and the thread monitor
symbol blinks on the display of the V810 or V820 control panel. After counting, C is displayed for the lefthand bobbin and
D for the righthand bobbin on the V810 control panel. On the V820 control panel, another symbol for the righthand,
lefthand bobbin or both bobbins is displayed instead of the type designation. Furthermore, the respective LEDs blink with
approx. 4 Hz on the machine (righthand, lefthand or both). The displays remain on even if the input signal is no longer
received. The sewing foot is not lifted after thread trimming and after counting. The sewing foot is lifted only after the
pedal has been heeled back from position 0 (neutral). The displays go off (the blinking frequency of 4 Hz is disabled), if no
more input signals are received after thread trimming and the subsequent sewing start after 14 stitches. This is an indicator
that the bobbin has been replaced, and the bobbin thread counter is reset to zero.
6.17.4 Parameter 195 = 2 – Model 767, N291 / With Stop / Sewing Foot Up after Seam
End
After the bobbin is empty, the bobbin thread counter is activated when receiving an input signal, and the thread monitor
symbol blinks on the display of the V810 or V820 control panel. After counting, C is displayed for the lefthand bobbin and
D for the righthand bobbin on the V810 control panel. On the V820 control panel, another symbol for the righthand,
lefthand bobbin or both bobbins is displayed instead of the type designation. Furthermore, the respective LEDs blink with
approx. 4 Hz on the machine (righthand, lefthand or both), and the drive stops. Even automatic seam sections like seams
with stitch counting or light barrier seams are interrupted. They can be completed by pressing the pedal forward from
position 0 (neutral).
Note the following exceptions:
If bobbin thread counting is completed in the start backtack, the latter will be completed and the drive stops.
If bobbin thread counting is completed in the end backtack, the latter will be fully completed with the thread trimming
operation.
After thread trimming the sewing foot is automatically lifted. The displays go off (the blinking frequency of 4 Hz is
disabled), if no more input signals are received after thread trimming and the subsequent sewing start after 14 stitches. This
is an indicator that the bobbin has been replaced, and the bobbin thread counter is reset to zero.
4000 dA82GA
250 --II--