Pfaff 1540 - Manual (Page 66)

64
Stitching off
34. Adjustment of needle threader
Requirement:
With the threader lever pushed fully down, prong 115 must pass through in the center between the top
and bottom edge of the needle eye of a size 70 needle (fig. 69).
The prong must have the same distance to either side of the walls of the needle eye.
Check:
z Insert a new system 130/705 H, size 70 needle.
z Move the needle bar to its top position by turning the handwheel.
z Push threader lever 116 fully down and swivel it forwards.
z Carry out a visual check.
Height adjustment:
z Disconnect pull-spring 117 from above (fig. 71).
z Press threader bracket 118 down and hold it in this position.
z Loosen Phillips screw 119 by just 1/4 of a turn.
z Push threader bracket 123 upward or downward until prong 115 has the same distance from the top
and bottom edge of the needle eye (fig. 69).
z Tighten screw 119 in this position.
Cross-check 1:
z Use the button to move threader prong 115 to the rear and to the front again.
z At the same time, carry out a visual check of the prong height.
Lateral adjustment:
z Use button 116 to turn the threader prong 115 to the front into the needle eye.
z Loosen screw 120 by just 1/8 of a turn (fig. 70).
z Move prong bracket 121 laterally until prong 115 is precisely centered in the needle eye.
z Tighten screw 120.
Cross-check 2:
z Use the button to move threader prong 115 to the rear and to the front again.
z At the same time, carry out a visual check of the lateral position of the prong.
z Rotate pull-spring 117 by two full turns counter-clockwise and engage it in hook 122 in such a way that
the body of the spring is positioned outwards to the left (fig. 71).
This ensures that the threader is swung automatically backwards.
z Operate the threader button and carry out a visual and functional check.