The Timing Of The Hook In Relation To The Needle - Husqvarna 6690 Manual

Setting the timing of the hook in relation to the needle
Requirements
Connect the machine and turn on the main
switch. As the needle is moving upwards the
tip of the hook should pass the centre of the
needle when the needle is 2.5 mm above the
lower turning position (the distance for
formning the loop).
Adjustment
Remove the cover (5/13) under the base plate.
There are three screws on the pulley (9/27, 28, 29),
one untreated and two black ones. Unscrew the
untreated screw and one of the black ones
completely, then loosen the other black screw so
that the lower shaft is still transported when the
handwheel is turned.
Turn the handwheel until the needle is at the
lower turning position. Place the setting gauge
411 1752 on the needle bar. Push the gauge
up until the spring-loaded stud just touches the
needle bar frame and tighten the screw. Remove
the hook cover (9/15). Turn the handwheel in the
same direction as the machine is running until the
spring-loaded stud rests against its stop in the
gauge, according to the right-hand figure. The
needle has now moved up 2.5 mm from the turning
position (the distance for forming the loop). Hold
the handwheel fast and turn the hook and the driver
so that the tip of the hook comes in front of the centre
of the needle. Screw fast one of the black screws.
Turn the handwheel in the opposite direction until
the needle returns to the lower turning position.
Hold the hook back with one finger, so that it is
pushed downwards and backwards, and turn the
handwheel in the same direction as the machine
is running. When the stud on the setting gauge is
once again resting against its stop, the tip of the
hook should be in the centre of the needle. When
tightening the screws on the pulley, the untreated
screw, which is a tipped screw, should change
places with the black screw which was unscrewed
earlier. Otherwise there is a risk that the untreated
screw returns to its previous position. Fit on the
hook cover and the cover under the base plate.
20
Setting gauge
411 1752-01
The lower turning
point of the needle
NOTE!
The tip of the
hook at the
centre of the
needle.