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Fig. 47: Retention spring on the looper
(1) - Holding point
(2) - Retention spring
Setting steps
1. Bend the retention spring (2) so that it rests flat against the looper (3).
2. Loosen the screw (5).
3. Set the distance to 0.5 mm by sliding the retention spring (2).
Important:
The force of the pressure of the spring against the looper must be checked
when the machine is completed and threaded.
4. Tilt the upper part of the machine backwards and turn by hand.
5. Check the described stitch formation during the right-to-left and left-to-
Sequence
Perform the sewing process and check the stitch formation.
54
①
②
Make sure that the pressure is greatest in front at the holding point (1).
right looper motion.
If required, if the needle thread loop is not pushed beyond the holding
point (1) reduce the pressure of the retention spring by bending it, or
increase the pressure if the needle thread loop is not held at the holding
point (1) until the needle enters the thread triangle on the left in front
of the needle thread loop.
③
⑤
(3) - Looper
(5) - Screw
Service Instructions 610/630 - 00.0 - 10/2014
Setting the looper
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