Pfaff 1193 - Thread Check Spring and Thread Regulator (on the PFAFF 1193)

Adjustment
11 - 14
11.16 Thread check spring and thread regulator (on the PFAFF 1193)
Requirement
1. The motion of the thread check spring should have ceased when the needle point
enters the material (spring stroke approximately
7 mm7 mm
7 mm7 mm
7 mm).
2. If the largest possible thread loop is formed when the thread is passed around the
hook, the thread check spring should have moved approximately
1 mm1 mm
1 mm1 mm
1 mm.
● Adjust thread tension 1 (screw 2) in accordance with the requirement.
● Check the needle thread tension, see Chapter 11.15 Needle thread tension release,
and re-adjust it if necessary.
● Adjust thread regulator 3 (screws 4) in accordance with requirement 2.
Due to technical reasons, it may be necessary to alter the specified spring
stroke.
Slide thread regulator 3 (screw 4) towards " + " (= more thread) or " - " (less
thread).
Fig. 11 - 13
4
3
-
1
2
+
7 mm