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Adjustment Procedures
1. How to install and use the synchronization adjustment gauge
(1) Put the steel rod
setscrew
.
(Caution) Use a key wrench (3 mm) instead of the steel rod
necessary.
(2) Loosen the setscrew
with the steel rod
(3) Install the throat plate
(4) Rotate the pulley to move the steel rod
set the clearance between the right surface of the steel rod and the
left surface of the throat plate
securing the front looper base
(5) Rotate the pulley counterclockwise and stop it when the steel rod
touches the left surface of the throat plate
(6) Mount the timing gauge
the timing gauge so that the top surface of the timing gauge
touches the bottom surface of the lower needle bar bushing
(Caution) Use a clip instead of the timing gauge
(7) When the pulley is rotated clockwise, the steel rod
side to side.
Touch the steel rod with the left surface of the throat plate
this moment, make sure that the clearance between the bottom
surface of the lower needle bar bushing
the timing gauge
(Caution) The bottom surface of the lower needle bar bushing
may touch the top surface of the timing gauge
of the other touch. In such a case, make sure that the
clearance between the steel rod
is within the allowable range.
(8) If the timing between the looper (steel rod
is inappropriate, follow the procedure below.
2. Corrective points and corrective measures
(1) For adjusting the timing between the looper (steel rod
needle bar
, loosen 9 setscrews
and remove the rear top cover
(2) Loosen 3 fixing nuts
couplings (
and
setscrew
to move the front main shaft coupling
counterclockwise direction for adjustment while keeping the rear
main shaft coupling
spanner.)
(Caution) 1. Align the match marks.
2. For moving the front main shaft coupling
temporarily tighten one of the fixing nuts
is close to the match mark, and make an adjustment.
o
To increase the clearance between the steel rod
, rotate the front main shaft coupling
o
To decrease the clearance between the steel rod
, rotate the front main shaft coupling
(3) After adjustment, put the rear top cover
and tighten the setscrew
in the front looper base
slightly and move the front looper base
integrated to the most left position.
and tighten the setscrew
to the most left position,
to 19 mm, and tighten the setscrew
.
to the needle bar
is within the allowable range.
securing the rear top cover
and the packing.
securing the front and rear main shaft
) and engage a key wrench (3/32") with the
unmoved. (For the fixing nut
clockwise.
counterclockwise.
and packing
.
and tighten the
if
.
.
. Be sure to mount
.
if necessary.
moves from
again.At
and the top surface of
ahead
and the throat plate
) and the needle bar
) and the
in the clockwise-
, use a 1/4"
,
, which
and throat plate
and throat plate
back on
– 13 –
Results of Improper Adjustment
o Improper synchronization position
adjustment may cause stitch
skipping or thread breakage.
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