Adjusting the thread trimmer
38 Service Instructions 171/173 - 00.0 - 01/2020
To assemble the thread trimmer and adjust the end positions:
1. Loosen the screws (3).
2. Remove the movable knife (4).
3. Position the thread trimmer such that the knife carrier (10) fits over
the ball lever (14).
4. Tighten the screws (2).
5. Screw the piston rod (11) into the block (12) until the piston rod (11)
lines up flush with the front of the block.
Fig. 26: Adjusting the thread trimmer (6)
6. Adjust the end position of cylinder (13) using the screw (15).
When the piston rod (11) is moved to the right end position, the edge
of the knife carrier (10) is flush with the edge (14) of the plate.
7. Use the screw (3) to tighten the movable knife (4) in such a way that
the settings are as follows:
• Point (1) points to the notch (7)
• The cutting edges of the knife move over top of each other at
approx 1 mm
8. Perform a cutting test by sewing with the shortest and with the longest
stitch length.
9. If necessary, correct the point (1) slightly.
(13) - Cylinder (15) - Screw
To Next Page
Loading...
