Shaping-Module Pressure Cylinder - Duerkopp Adler 743-221 Service Manual

3.4.2

Shaping-module pressure cylinder

1
2
3
4
5
6
Regulation and inspection
The pressure cylinder 3 closes the shaping module.
The clamping frame 1 is supported on a shaft. The pressure cylinder 3
is free to swing. The return movement is carried out by the spring
plate 7. When the shaping module is fitted the roller bracket is
opposite the control cam 6.
Caution: danger of injury
Turn off the main switch.
The pressure cylinder may only be adjusted with the sewing machine
switched off.
Adjustment
1. Adjusting the height.
–
Turn the handwheel until the needle is at top dead centre.
–
Move the shaping module. The guide roller 5 of the pressure
cylinder 3 must press on the curve of control cam 6.
–
Undo screw 2 and move the pressure cylinder 3 in the clamping
frame 1.
The distance between the tip of the needle and the upper side of
the shaping module is 2.5 mm. The inner surfaces 4 of the roller
bracket must be parallel to the control cam 6.
–
Retighten screw 2.
2. Adjusting the spring plate 5.
–
Undo clamping screw 8.
–
Move the spring plate 7 along the shaft.
5 mm of the spring plate must be in contact with the clamping
frame.
The guide roller 5 is above the centre of the control cam.
–
Retighten clamping screw 8.
IMPORTANT !
The slide surface of the spring plate 7 must always be kept greased.
7 8
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