Operation Manual

Operation
Operating Instructions 610-01/630-01 - 02.0 - 08/201532
5.7 Adjusting the thread quantity, thread tension
and seam appearance
5.7.1 Thread types and seam appearance
Both the thread tension and the thread quantity for stitch formation
must be adjusted to the desired seam appearance for both needle
thread and looper thread.
A differentiation is made between 3 seam types:
• Tight seams (a)
• Normal seams (a)
• Looser seam (highly elastic) (b)
Fig. 12: Different seam types
5.7.2 Adjusting the thread tension
Correct setting
The desired stitch formation is achie
ved. The tension of the needle
thread must be tighter than the tension of the looper thread.
Faults due to incorrectly set tension
• Excessively tight tensions: The sewing material is pulled
toge
ther
• Looper thread tension too loose: Missed stitches
The thread tension is set using the control panel.
(a) – Tight and normal seam (b) – Looser seam
(a) (b)