Operation Manual

Operation
Operating Instructions 610-01/630-01 - 02.0 - 08/2015 35
Correct setting
The correct setting is dependent on the stitch length and the seam
type ( 5.7.1 Th
read types and seam appearance, pg. 32).
In particular for extreme settings, it must be ensured that the looper
threa
d quantity is not too large:
Extreme
settings
• Elastic seam (largest possible th
read quantity) with very short
stitch length
• Considerable enlargement of the stitch leng
th for elastic
seams
Faults due to excessively large looper thread quantity
• Missed stitches
• Looper thread jumps off the thread pick-up disk.
Fig. 14: Adjusting the looper thread take-up
(1) – Thread down-holder
(2) – Thread down-holder:
Lower bar
(3) – Looper thread take-up:
Hole for thread guide
(4) – Looper thread take-up edge:
Scale reading point
(5) – Looper thread take-up
(6) – Fastening screw
④
④
②
⑤
③
①
⑥