6.4 Adjusting the thread regulator
Caution: danger of injury
Turn off the main switch.
The thread regulator may only be adjusted with the sewing machine
switched off.
The thread regulator 3 controls the quantity of needle thread required
for stitch formation.
The thread regulator must be precisely adjusted for an optimum result.
The thread-regulator setting depends on the following factors:
–
Stitch length
–
Material thickness
–
Characteristics of the sewing yarn in use.
At the correct setting the needle-thread loop must slide at low tension
over the thickest point of the shuttle.
–
Undo screws 1 and 2.
–
Adjust the thread regulator 3.
–
Tighten screws 1 and 2.
Adjustment hint:
If the maximum quantity of thread is required the thread-tensioning
spring 4 must be pulled upwards about 0.5 mm from its lower limit
position. This is the case when the needle-thread loop passes the
maximum shuttle diameter.
Adjusting the thread regulator
–
Undo screws 1 and 2.
–
Move the thread regulator 3:
to the left for more thread,
to the left for less thread.
–
Tighten screws 1 and 2.
12
1
23
4
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