EFKA DA82GA3312
44
6.24 Thread Trimming Operation
Functions Parameter V820
Thread trimmer On lefthand arrow On Key 5
Thread trimmer and thread wiper On both arrows On
Thread wiper On righthand arrow On
Thread trimmer and thread wiper Off both arrows Off
Thread trimmer On/Off (FA) 013
Thread wiper On/Off (FW) 014
Functions Parameter
Last stitch at the seam end backward/forward short trimmer (FAr) 136
Thread trimmer activation angle by means of increments (iFA) 190
Thread tension release switch-off delay (FSA) 191
Thread tension release switch-on delay by means of increments (FSE) 192
Stop time for thread trimmer (tFA) 193
Thread trimmer switch-on delay by means of increments (FAE) 194
Thread wiper ON period (t6) 205
Delay time from end of thread wiper to start of sewing foot lift (t7) 206
The thread trimmer and thread wiper functions can be enabled and disabled using key 5 on the control panel.
The thread trimming operation is initiated by full heelback or automatically at the end of a counted seam section or
automatically by light barrier sensing after the light barrier compensating stitches. When the thread trimmer is Off, the
drive stops immediately in the set reverse position.
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 and On with short trimmer signal. 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.
The thread trimmer signal is enabled for 1msec with the first stitch after power On. Thread monitor sensitivity is thereby
switched to 100% provided that a thread wiper function has been activated using parameter 195.
6.24.1 Thread Trimmer
The thread trimmer signal is enabled when reaching trimming speed with leading position 1 and after a switch-on delay
(parameter 194) and is disabled after completion of the angle which can be adjusted (parameter 190), or at the very latest
with the stop in position 2. A stop time for the thread trimmer, during which the drive is at standstill after reaching position
1, can be set with parameter 193. If position 2 is not reached due to a mechanical defect, the thread trimmer signal is
disabled after 10 sec.
6.24.2 Thread Wiper
The thread wiper signal is enabled for a time that can be regulated with parameter 205 after reaching position 2. After the
thread wiper has been disabled, there will be a time lag that can be regulated with 206 until the sewing foot is lifted. The
thread wiper signal is active if parameter 136 is set to “0” or “1”. At setting “2” the short trimmer function is active.
6.24.3 Thread Tension Release
The thread tension release signal can be enabled with a time lag relative to the thread trimmer. The time lag is an angular
value ( 1 increment = 0.7°) consisting of increments inputted in parameter 192. The signal is disabled in position 2. It can,
however, be extended for a time that can be regulated with parameter 191.
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