Timing Of The Hook In Relation To The Needle - Husqvarna 1200 Service Manual

9 Timing of the hook in relation to the needle

Requirements
Switch on main switch, and set the machine for straight
stitching.
As the needle is moving upward the tip of the hook
should pass the centre line of the needle when
the needle is 2,5mm above the lower turning position
(the distance for forming the loop).
Check
Remove the rear cover, the lamp cover and the handwheel.
Remove the hook cover.
1. Turn the arm shaft by means of the driver pin so
that the needle reaches its lower turning position.
2. Place the setting gauge 411 17 52-01 on the
needle bar until the spring-loaded stud (A)
touches the needle bar frame and tighten the
screw.
3. Move the needle up by pulling the short cog belt
in toward the machine until the spring-loaded
stud rests against its stop in the gauge, according
to the figure on the right.
The needle has now moved up 2,5mm from the
turning position (the distance for forming the
loop).
Hold the hook back so that it is pushed downward
and backward. The tip of the hook shall now be in
the centre of the needle.
Adjustment
-Remove the pointed screw (B) and undo the other
two screws.
-Repeat the checking points 1,2 and 3.
- Hold the arm shaft and turn the hook and the driver
by pulling the short cog belt in toward the machine
until the tip of the hook comes in front of the centre
of the needle.
When tightening the screws on the pulley, the pointed
screw should change places with the black screw that
was unsrewed earlier. Otherwise the pointed screw
might retake its earlier position.
Mount the hook cover, the rear cover, the lamp cover and the handwheel.
(Note! the position of the handwheel in the screen).
Comments
By moving the needle all the time by means of the short cog belt, this
will counteract any possible play between the long cog belt and the cog wheels.
NOTE!
The axial play of the arm shaft might change when loosening the screws.
Maximum play may be 0,05 mm.
30 Husqvarna service manual 104 72 30-26
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