8
104 73 15-26
10. The gap between the needle and the hook
The gap should be as small as possible, but max 0.15 mm - Straight stitch 2.5
mm.
11. Setting the needle plate (the hook cover) in relation to the needle in the feeding
direction.
The needle should, in the feeding direction, descend right into the middle of the
needle hole of the needle plate.
9. The play of the hook gear
It is impossible to obtain an equally large play in one rotation of the cog wheel,
but it should be as small as possible at the tightest spot during the revolution.
2. Belt tension, motor belt
Move the motor unit (b) util a correct belt tension is obtained.
Settings - Quick reference
1. Belt tension, drive belt
The belt tension shall be adjusted by re-position tensioning roller by push
it up or down until it is a fi rm belt tension.
Settings - Quick reference
6. Setting the needle in centre position
The needle should always get to the centre position, when the main switch is turned.
3 Upper shaft axial play
No lateral play between main shaft collar and bushing and main shaft should
rotates smoothly. Screws (a, b) used for adjustment.
8. The timing of the hook in relation to the needle
When the needle is in its centre position and the needle is
moving upwards, the tip of the hook should pass behind the
centre of the needle, when the needle is 2.3 mm above its lower
turning position.
4. Take up lever
When turning the hand wheel no noise should appear in the thread take up lever.
5. Timing of the Feeding in relation to the needle
When is in its needle lowest point.The feed lifting rock cam (a) and the screw (b)
of feed rock cam (c) should now be parallel.
7. Zigzag movement of the needle adjustment
On Zig-zag 4x7 mm and while urn the hand wheel to move the needle bar
upward. The vertical distance in which the needle point goes up until it swings
over to the right side should be 6.0~6.2mm.
1
3~4m/m
2
b
d
c
a
b
1
d
c
a
b
1
a
b
1
1
Needle plate
6.0-6.2mm
1
0.05~0.1 mm
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