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
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6.6.2 End Backtacking Stitch Count
Functions Parameter
Number of stitches backward (Err) 002
Number of stitches forward (Erv) 003
The number of end backtacking stitches can be set using the above parameters directly on the V810/V820 control panel.
For fast operator information (HIT) when using the V820 control panel, the value of the function enabled using key 4 can
be displayed for approx. 3 seconds. During this time, the value can be varied directly by pressing key + or -.
6.6.3 Last Stitch Backward
Functions Parameter
Last stitch backward On/Off (FAr) 136
For some sewing procedures it is desirable that the backtack solenoid in the single end backtack is disabled only after
trimming. This function can be selected using parameter 136 and works only in the single end backtack.
Parameter 136 = 0 Trimming stitch forward and thread wiper function On.
Parameter 136 = 1 Trimming stitch backward and thread wiper function On.
Parameter 136 = 2 Trimming stitch forward with short trimmer signal On. Thread wiper function Off.
Parameter 136 = 3 Trimming stitch forward with signal for stitch length reduction during softstart and
signal for short trimmer On. Thread wiper function Off.
Parameter 136 = 4 Trimming stitch forward with signal for stitch length reduction during softstart.
Thread wiper function Off.
6.6.4 Double End Backtack
The backward section will be executed for a number of stitches that can be set. Then the stitch regulator will be disabled
and the forward section will be executed. The number of stitches for the two sections can be set separately.
After stitch counting (parameter 003) the trimming function will be initiated. During the entire operation the sewing speed
is reduced to speed n4, with the exception of the last stitch, which will be performed at positioning speed n1.
6.6.5 Single End Backtack
The single end backtack is performed at end backtack speed (n4). During the last stitch the speed is reduced to positioning
speed. The stitch regulator remains On or is disabled depending on parameter 136.
6.6.6 Backtack Synchronization
Function Parameter
Backtack synchronization for start and end backtack On/Off (nSo) 123
Backtack synchronization speed (nrS) 124
If parameter 123 is on, the backtack speed will be switched to backtack synchronization speed one stitch before engaging
and disengaging of the backtack solenoid. The backtack speed is released at the next position 2. If the synchronization
speed, that can be set using parameter 124, is higher than the backtack speed, the latter is maintained. Backtack
synchronization is possible in the start and end backtack.
6.7 Start and End Backtack with Switch-On and Switch-Off Delay
It is possible to compensate inertia of the start and end backtack system by parameter setting. Use parameter 101 and 102
for the start backtack and parameter 103 and 104 for the end backtack.