Adjustment
11 - 31
11
.04.27
Thread check springs (PFAFF 574)
Requirement
1. The movement of thread check springs
3
and
6
should be completed when the needle
points penetrate the fabric (spring stroke approx.
7 mm
).
2. When the largest thread loop is formed while the thread is passed around the hook, the
thread check springs
3
and
6
should rise slightly from supports
1
and
9
.
●
Adjust support
1
(screw
2
) according to
requirement 1
.
●
To adjust the spring tension of thread check spring
3
turn screw
4
(screw
5
).
●
To adjust the spring tension of thread check spring
6
turn bush
7
(screw
8
).
●
Adjust support
9
(screw
10
) according to
requirement 1
. (If the adjustment range is too
low, support
9
can be screwed into another hole).
●
Adjust the thread regulator
11
(screw
12
) according to
requirement 2
.
For technical reasons it may be necessary to deviate from the specified spring
stroke or spring tension.
Move the thread regulator
11
(screw
12
) towards "
+
" (= more thread) or "
-
" (=
less thread).
Fig. 11 - 27
61-046
5
3
2
4
6
7
8
9
10
12
1
7 mm
11
+
