Needle Bar - Dürkopp Adler 366 Instructions For Mechanics Manual

2.3 Hook and needle bar
Please note the safety instructions!
2.3.1 Hook movement
Explanation:
The hook movement must be adapted to the movement of the needle
bar.
Rule:
When the needle bar is about 3 mm from its lower dead point, the
driver should be at its left inversion point (fig. 6).
Control:
- Move the driver to its left point of inversion.
- Push the block B/13 (ref. no. 981 15 000 2) on the needle bar
against the bush and fasten by screws.
(The needle bar may be damaged if the block is tightened
excessevely!).
- Turn the handwheel in the direction of rotation until the needle has
reached its lowest point.
- Determine the distance between the top of the block and the bush.
Correction:
- Loosen screw e/3.
- Turn eccentric E/3.
2.3.2 Loop stroke
Explanation:
The loop stroke is the way of the needle from its lower dead point
up to the moment when the formed thread loop is picked up by the
hook.
Rule:
When the needle has been lifted 5 mm from its lower dead point, the
hook point should be in alignment with the right side of the needle
(fig. 4).
Control:
- Adjust the stitch width zero.
- Move the needle by the handwheel into its lowest position.
- Push the 5 mm long stroke gauge (ref. no. 981 15 001 2) on the
needle bar against the bush and fasten the block (ref. no.
981 15 000 2) by screw (fig. 13).
- Remove the gauge and turn the handwheel in the direction of ratation
until the block touches the bush. (Loop formation position).
- Press the hook M/14 counter-clockwise against the driver 0/14 and
check the position of the hook point.
Correction:
- Loosen n/16 screws.
- Turn N/16 shaft.