50 PFAFF
50 Step-cut (feather-cut) trimming mechanism (only on 3822-1/24)
50.1 Note on motor control
Setting deviates from 1st stopping position !!
Requirement: When the teeth of the descending feed dog are in line with the top surface
of the needle plate, the first stopping position must be made.
50.2 Preparations for adjusting the trimmer
Remove: - Presser foot
- Complete top knife bracket 1 (loosen screws 2, Fig. 1)
- Cover of knife drive
50.3 Setting the longest knife stroke
Set actuating lever 3 (Fig. 2) right at bottom of elongated hole in lever 4 (nut 5).
50.4 Setting the top reversal point of the knife
Requirement: When the eye of the descending needle is level with the needle plate, the
downwards movement of the top knife must begin.
.1 Switch on trimming mechanism (key , LED on, Fig. 3).
.2 Adjustment: eccentric 6.
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