Adjusting The Thread Regulator - Dürkopp Adler 667 Operating Instuructions

3.5 Adjusting the thread regulator

1
3
2
Fig. 6
Caution: Risk of injury!
Switch off the main switch.
The thread regulator may only be adjusted with the sewing machine switched
off.
The thread regulator 1 controls the quantity of needle thread required for
stitch formation. The thread regulator must be precisely adjusted for an
optimum result.
With correct setting the needle-thread loop must slide with low tension over
the thickest point of the hook.
– Loosen screw 2.
– Adjust the position of thread regulator 1: thread regulator to the left
= more thread; thread regulator to the right = less thread
– Tighten screw 2.
Adjustment information:
If the maximum quantity of thread is required, the thread-tensioning spring 3
must be pulled upwards approx. 0.5 mm from its lower limit position. This is
the case when the needle-thread loop passes the maximum hook diameter.
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