Needle Rise, Hook-To-Needle Clearance And Needle Height - Pfaff 335 Adjustment Manual

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Needle rise, hook-to-needle clearance and needle height

.04.08
Requirement
With the stitch length set at "3" (1.8 mm after the bdc of the needle bar) the following
must be correct:
1. The hook point must be opposite the middle of the needle and the distance to the needle
must be 0.05 - 0.1 mm.
2. The top edge of the needle eye must be 0.8 mm from the hook point.
Fig. 13 - 08
Set the stitch length at "3" and loosen screws 1 and 2 (screw 2 is on the back of the
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machine).
Set the needle bar at b.d.c. and place the 1.8 mm thick feeler gauge with its cutout close
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under the lower needle bar bearing.
Remove the measuring plate and turn the handwheel in its direction of rotation until the
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screw clamp is touching the needle bar bearing.
Move the hook on the hook shaft in accordance with requirement 1.
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Rotate the hook in accordance with requirement 2 (adjust needle height if necessary).
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Bring the hook shaft bearing 3 to rest on the hook and tighten screw 2.
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Taking care to ensure that the bevel gear 4 is resting on the bearing 5, tighten screws 1.
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1 3
1 2
On machines with a thread trimmer the adjustment of the axial play on the
hook shaft and the adjustment of the hook shaft bearing 3 are not necessary.
Adjustment
4
5
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