Adjusting the bobbin case lifter
62 Service Instructions M-TYPE DELTA - 00.0 - 12/2019
7. Insert the plug (1) into the slot.
8. Perform a sewing test.
9.2.2 For machines with a short thread cutter
Fig. 47: Adjusting the timing for lifting
Proper setting
The bobbin case lifter starts to open exactly at the point when the hook tip
is located below the bobbin case lifter after the loop is taken up.
In 1-needle machines, this happens when the handwheel position is
approx. 350°.
For 125° or 298°, the threaded pin (4) on the left hook bearing is exactly in
the middle of the slot. (Insert allen key in the threaded pin for orientation.)
To adjust the timing for lifting:
1. Tilt the machine head ( p. 18).
2. Remove the plug (1) on the bottom side of the hook housing (2).
3. Loosen the threaded pin (4) through the slot.
4. Turn the handwheel until the hook tip is exactly below the bobbin case
lifter.
5. Use the allen key to turn the control cam (3) so that the bobbin case
lifter opens at the correct point in time.
6. Tighten the threaded pin (4).
7. Insert the plug (1) into the slot.
8. Perform a sewing test.
(1) - Plug
(2) - Hook housing
(3) - Control cam
(4) - Threaded pin
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