Scissor Tripping-Lever In Relation To The Control Cam Of The Scissor - Pfaff 1491E1 Instruction Manual

Adjustment
13.

Scissor tripping-lever in relation to the control cam of the scissor

07.08
13 - 41
Requirements
At the left point of reversal of the rock shaft 3
1. the roller of tripping lever 4 and the roller of back-racking lever 5 must be in the middle
of control cam 6 and
2. there must be a distance of 0.3 mm between the roller of tripping lever 4 and the
external circumference of control cam 6.
6
4
3
1
Fig. 13 - 37
Bring the needle bar to BDC and activate the tripping lever by hand.
Loosen screws 1 and 2.
Turn the handwheel in the direction of rotation until rock shaft 3 is at its left point of
reversal.
Move tripping lever 4 and back-racking lever 5 in accordance with requirement 1.
Turn tripping lever 4 in accordance with requirement 2.
In this position and observing requirement 1, tighten screw 1.
Screw 2 remains loosened for the following adjustment.
5
2
6
4