Adjustment
13.
04.21
Thread check spring ( 1471E1 )
Requirement
1. The motion of the thread check spring
7
must be completed when the needle point
enters the material ( spring travel approx.
7 mm
).
2. When the thread loop is at its largest when going around the hook, the thread check
spring
7
must be slightly raised above the support
1
.
_
2
7 mm
7
1
6
5
+
3
4
Fig. 13 - 20
●
Move support
1
( screw
2
) in accordance with
requirement 1.
●
Turn screw
3
( screw
4
) to adjust the spring power.
●
Move the slack thread regulator
5
( screw
6
) 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 described here.
Move the slack thread regulator
5
( screw
6
) toward the „
+
“ ( = more thread )
or toward the „
-
“ ( = less thread ).
13 - 25