Thread Check Spring And Slack Thread Regulator - Pfaff 1183-712/02 Adjustment Manual

12

Thread check spring and slack thread regulator

.05.06
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 sp-
ring must have moved by approx. 1 mm.
Fig. 12 - 07
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
Adjustment
-
1
12 - 8