Instruction manual

EFKA AB221A/AB321A + AB222A/AB322A (BA)
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9.22.1 Thread Trimmer/Thread Wiper (Lockstitch Modes)
Function with or without control panel Parameter
Stop during thread trimming depending on angle (dr°) 197
Thread wiper time (t6) 205
Thread wiper switch-on delay (dFw) 209
Holding power output M1 of the thread trimmer backward (t11) 213
Thread trimmer activation angle (iFA) 250
Thread tension release switch-off delay (FSA) 251
Thread tension release switch-on delay (FSE) 252
Stop time for thread trimmer (tFA) 253
Upper limit ON period of thread trimmer backward (EV-) 255
Switch-on delay angle of the thread trimmer (FAE) 259
Thread trimming in the lockstitch modes is performed at trimming speed.
When the thread trimmer is off, the drive stops in position 2 at the seam end; it stops in position 1 at the end of
programmed seams.
The thread wiper ON period can be set depending on the selected trimming mode (see chapter "Timing Diagrams" in the
List of Parameters). The delay time (t7) (parameter 206) prevents sewing foot lifting before the thread wiper is in its initial
position.
If the thread wiper is not connected, there will be a delay time (tFL) after thread trimming until sewing foot lifting.
9.22.2 Trimming Speed
Function with or without control panel Parameter
Trimming speed (n7) 116
9.22.3 Activation of Short Trimmer
With sewing machines equipped with a short trimmer system, the required functional sequence can be activated using
parameter 168. The selected value determines from which output the signal required for short trimming will be issued. The
thread trimming function must be On.
Function with or without control panel Parameter
Short trimmer function Off (kFA) 168 = 0
Short trimmer On (Dürkopp Adler model 767 mode 3) 168 = 3
Short trimmer On (Juki LU1521N-7 mode 30) 168 = 9
Short trimmer On (Juki LU2210 mode 25) 168 = 12
9.22.4 Chainstitch Thread Trimmer (Various Modes)
Thread trimming in the chainstitch modes is performed at machine standstill in position 2.
The signal sequence of M1...M4 and sewing foot lifting at the seam end can be set as desired using parameters 280...288
(parallel or sequential).
When the thread trimmer is off, the drive stops in position 2 at the seam end.
9.22.5 Chainstitch Machine Trimming Signal Times
Signal delay times and ON periods can be set with the help of the following parameters.
See chapter 8 »Setting the Basic Functions, Selection of Functional Sequences« in this manual for further information on
chain stitch seam end variants and chapter »Timing Diagrams« in the List of Parameters.
Function with or without control panel Parameter
Delay time output M1 (kd1) 280
ON period output M1 (kt1) 281
Delay time output M2 (kd2) 282
ON period output M2 (kt2) 283
Delay time output M3 (kd3) 284
ON period output M3 (kt3) 285
Delay time output M4 (kd4) 286
ON period output M4 (kt4) 287
Delay time until sewing foot On (kdF) 288
ON period output M7 (signal if parameter 290 = 16) (kt5) 289