Thread Check Spring And Slack Thread Regulator - Pfaff 1051 Instruction Manual

Adjustment
11

Thread check spring and slack thread regulator

.05.15
Requirement
1. The motion of the thread check spring must be completed when the needle point
enters the material (spring stroke approx. 7 mm).
2. When the thread loop is at its largest when going around the hook, the thread check
spring must have moved by approx. 1 mm.
Fig. 11 - 16
Turn thread tension 1 (screw 2) according to requirement 1.
Turn thread tension 3 (screw 4) according to requirement 2.
Due to technical sewing reasons it may be necessary to deviate from the
spring stroke indicated above.
Move the slack thread regulator 3 (screw 4) toward the "+" (= more thread) or
toward the "-" (= less thread)
4
+
3
2
-
1
11 - 17