Adjustment
13.04.22 Thread check springs ( 1474E1 )
Requirement
1. The motion of the thread check springs 3 and 6 must be finished when the needle
points enter the material ( spring travel approx. 7 mm ).
2. When the thread loops are at their largest when going around the hook, the thread
check springs 3 and 6 must be slightly raised above the supports 1 und 9.
● Move support 1 ( screw 2 ) in accordance with requirement 1.
● Turn screw 4 ( screw 5 ) to adjust the tension of the thread check spring 3.
● Turn sleeve 7 ( screw 8 ) to adjust the tension of the thread check spring 6.
● Move support 9 ( screw 10 ) in accordance with requirement 1. ( If the adjustment
range is too small, the support 9 may be screwed into another hole. )
● Move the slack thread regulator 11 ( screw 12 ) in accordance with requirement 2.
Due to technical reasons related to sewing, it may be necessary to deviate
from the spring travel or the spring power mentioned here.
Move the slack thread regulator 11 ( screw 12 ) toward the „+“ ( = more
thread ) or toward the „-“ ( = less thread ).
Fig. 13 - 21
3
2
4
6
7
8
9
10
12
1
7 mm
5
11
+
13 - 26