Table of Contents
Advertisement
12. No upper thread trimming.
13. No lower thread trimming.
14. Second and third stitches incor-
rectly locked at the beginning of
sewing after previous trimming.
15. Insuggicient quality of trimming.
11.2 Upper thread out of tensioning
dishes and 2x caught by hook
point.
11.3 Insufficient gap between needle
and piercing hole from hook side.
12.1 Incorrectly threaded thread.
12.2 Upper thread excessively braked
when moving upwards due to thin
needle, thick elastic material, low
feeder position, low thread tension.
12.3 Tensioner electromagnet cuts
soon main tensioner during trim-
ming.
12.4 Fixed trimming knife does not fit
with all its width against movable
knife.
12.5 Movable knife does not run over
movable knife edge.
12.6 During trimming cycle, safety
clutch against hook overload gets
disengaged.
13.1 Incorrect movable knife path set-
ting.
13.2 Short movable knife path.
13.3 Incorrect cam setting.
13.4 Incorrect trimming knife height
setting.
14.1 Incorrect setting of lower hook
thread retaining spring.
15.1 Incorrect setting of the cutting sur-
face (cutting edge) against the edge
of the throat plate insert.
Incorrect setting of the cutting sur-
face (cutting edge) against the nee-
dle.
Knife (cutting edge) height incor-
rectly set - according too the trim-
med material.
15.2 Excessive blunting of the knife cut-
ting edge.
19
Thread upper thread according to NP, par.
6.1.
Set side position of the throat plate post
according to SK par. 3.3.3.
Thread the thread according to NP, par.
6.1.
Insert thicker needle according to NP, par.
6.5.
Lift wheel feeder according to SK, par.
3.5.3.2.1.
Delay position of cutting the main ten-
sioner according to SK, par. 4.9 and ac-
cording NP, part B, par. 5.2.2, 5.3.2; Mini-
stop, par. 5.2.5 - parameter 192.
Set knives according to SK, par. 4.7.
Set knife according to SK, par. 4.5.
Increase clutch disengaging moment
according SK, par. 3.9.2.
Set knife according to SK, par. 4.5.
Increase path by correct fork setting
according to SK, par. 4.4.
Set cam according to SK, par. 4.3.
Set height according to SK, par. 4.6.
Set spring according to SK, par. 4.8.
Set the knife for material trimming ac-
cording to SK par. 5.3.
Sharpen the trimming knife according to
SK, par. 5.7. A correctly sharpened knife
trims the material by pulling.
Advertisement
Table of Contents
