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1. How to install and use the synchronization adjustment gauge
(1) Put the steel rod
in the front looper base
and tighten the
setscrew
.
(Caution) Use a key wrench (3 mm) instead of the steel rod
if
necessary.
(2) Loosen the setscrew
slightly and move the front looper base
with the steel rod
integrated to the most left position.
(3) Install the throat plate
and tighten the setscrew
.
(4) Rotate the pulley to move the steel rod
to the most left position,
set the clearance between the right surface of the steel rod and the
left surface of the throat plate
to 19 mm, and tighten the setscrew
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
to the needle bar
. Be sure to mount
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
if necessary.
(7) When the pulley is rotated clockwise, the steel rod
moves from
side to side.
Touch the steel rod with the left surface of the throat plate
again.At
this moment, make sure that the clearance between the bottom
surface of the lower needle bar bushing
and the top surface of
the timing gauge
is within the allowable range.
(Caution) The bottom surface of the lower needle bar bushing
may touch the top surface of the timing gauge
ahead
of the other touch. In such a case, make sure that the
clearance between the steel rod
and the throat plate
is within the allowable range.
(8) If the timing between the looper (steel rod
) and the needle bar
is inappropriate, follow the procedure below.
2. Corrective points and corrective measures
(1) For adjusting the timing between the looper (steel rod
) and the
needle bar
, loosen 9 setscrews
securing the rear top cover
and remove the rear top cover
and the packing.
(2) Loosen 3 fixing nuts
securing the front and rear main shaft
couplings (
and
) and engage a key wrench (3/32") with the
setscrew
to move the front main shaft coupling
in the clockwise-
counterclockwise direction for adjustment while keeping the rear
main shaft coupling
unmoved. (For the fixing nut
, use a 1/4"
spanner.)
(Caution) 1. Align the match marks.
2. For moving the front main shaft coupling
,
temporarily tighten one of the fixing nuts
, which
is close to the match mark, and make an adjustment.
o
To increase the clearance between the steel rod
and throat plate
, rotate the front main shaft coupling
clockwise.
o
To decrease the clearance between the steel rod
and throat plate
, rotate the front main shaft coupling
counterclockwise.
(3) After adjustment, put the rear top cover
and packing
back on
and tighten the setscrew
.
o Improper synchronization position
adjustment may cause stitch
skipping or thread breakage.
Adjustment Procedures
Results of Improper Adjustment
Summary of Contents for 35800 Series
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