Adjusting the thread trimmer
Service Instructions 171/173 - 00.0 - 01/2020 39
Adjusting the thread advancing device for needle and hook thread
Fig. 27: Adjusting the thread trimmer (7)
Proper setting
The thread tensions are opened and the thread advancing devices (16)
for needle thread and hook thread are pressed while the thread is being
cut. The advanced, tension-free thread serves to ensure proper stitch
formation at the next seam beginning.
No more thread than is required should be advanced as this determines
the length of the thread end remaining at the seam beginning.
To adjust the thread advancing device for needle and hook thread:
1. Adjust the stop (17) to advance more or less thread.
The thread advancing device (18) is stepped.
(16) - Thread advancing device (17) - Stop
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