Driver Reversal Point And Needle Bar Rise - Pfaff 3339 Instruction Manual

11.
10.04

Driver reversal point and needle bar rise

Requirement
With the needle bar at its b.d.c. the hook point must be at its left point of reversal.
1
Fig. 11 - 12
Loosen screw 1 on driver 2 just enough so that the driver can be rotated with difficulty
on its shaft.
Insert the hook into the hook race and bring the needle bar to its b.d.c.
Set the needle bar rise at 2.4 mm (use the clamp screw).
Turn the hook simultaneously with the driver so that the hook point is directly behind
the needle.
Rotate the V-belt wheel backwards until the clamp screw is touching the needle bar
frame. The hook point must once again be directly behind the needle.
Continued on next page.
Check that on the parts on the drive shaft (e.g. spur toothed wheel, eccentric
and worm) the first screw in the direction of rotation is on the surface/in the
groove and all the screws are tightened.
2
Adjustment
11 - 13