Instruction manual

EFKA AB221A/AB321A + AB222A/AB322A (BA)
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9.9 Intermediate Backtack / Single Stitch (Correction Sewing), (Mode 31)
Function with control panel V810 V820
Function “intermediate backtack / single stitch” on input in1 F-240 = 76 F-240 = 76
Function “single stitch” On/Off Key 3 Key 8
An intermediate backtack with all options described in chapter “Intermediate Backtack” can be activated during machine
run using a key connected to input in1.
One stitch will be performed at stop in the seam. The single stitch function can be disabled on the Variocontrol.
9.10 Stitch Regulator Suppression/Recall
Effective in standard and ornamental backtack
The next backtack and/or stitch condensing operation can be suppressed or recalled once by pressing an external key
according to the pre-selection of parameters 240...249.
Upon pressing Start backtack/ Start backtack/ End backtack/ End backtack/
Stitch condensing Stitch condensing Stitch condensing Stitch condensing
On Off On Off
Before start of No backtack/ Backtack/ ----- -----
seam Stitch condensing Stitch condensing
In the seam ----- ----- No backtack/ Backtack/
Stitch condensing Stitch condensing
The double backtack is performed in the above cases.
See List of Parameters chapter Connection Diagram!
9.11 Holding Power of the Stitch Regulator Solenoid
Function with or without control panel Parameter
Time of full power (t10) 212
Holding power of the stitch regulator solenoid (t11) 213
Upper limit stitch regulator ON period (EV-) 255
The stitch regulator solenoid is engaged by full power. Then the system switches automatically to partial power in order to
reduce the load for the control and the connected solenoid. Set the duration of full power using parameter 212 and the
partial holding power using parameter 213.
Value Duty ratio (ED) Effect
1 1 % low holding power
100 100 % high holding power (full power)
CAUTION!
If the holding power is set too high, the solenoid and the control may be permanently
damaged. Please observe the permissible duty ratio (ED) of the solenoid and set the
appropriate value according to the table below.