48 PFAFF
49.4 Positioning the top knife in sewing direction
Requirement: The needle must be at the middle of the top-knife cutting edge (Fig. 6).
Shift knife bracket 11 (Fig. 7) according to requirement (screw 12).
49.5 Positioning the top knife crosswise to sewing direction
Requirement: Top knife 9 must rest on the counter knife with a light pressure (the knife
spur must not strike the counter knife!)
.1 Switch on the trimming mechanism (key , LED on, Fig. 2).
.2 Set top knife at lowest position (balance wheel).
.3 Place top knife with light pressure against counter knife (screws 13, Fig. 7).
Requirement: Top knife 9 (Fig. 8) must be at a slight diagonal to counter knife 14 (shearing
action).
.4 Set knife bracket 11 (Fig. 7) at a slight diagonal (screw 15).
49.6 Adjusting the stop eccentric
Requirement: When stop 16 (Fig. 9) is resting on eccentric 17, there must be a clearance of
about 5 mm between the front edge of housing 18 and lever 19.
.1 Disconnect compressed air.
.2 Pull plunger 20 fully downwards.
.3 Making sure that stop 16 is resting on eccentric 17, set eccentric 17 acording to requirement
(screw 21).
.4 Re-connect compressed air.
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