Scissor Return Control - Pfaff 1491E1 Instruction Manual

13.

Scissor return control

07.11
Requirements
1. When the point of the trip of control cam 1 is exactly at the roller of tripping lever 2 and
trip 3 is touching the beginning of the angular edge of guide plate 5 ( see arrow ) there
must be a clearance of approx. 0.6 mm between trip 3 and guide plate 5.
2. When the rock shaft has sprung back to its starting position the maximum clearance
between trip 3 and guide plate 5 must be 0.3 mm.
1
Fig. 13 - 40
Position the point of the trip of control cam 1 exactly at the roller of tripping lever 2 by
turning the handwheel.
Move trip 3 ( screw 4 ) in accordance with requirement 1.
Bring rock shaft back to its starting position.
Check requirement 2. If necessary, position guide plate 5 appropriately.
5
4
3
2
Adjustment
1
2
13 - 44