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Adjustment Procedures
1. Installation of upper feed roller
(1) Raise the upper feed roller pressing shaft
feed roller pressing shaft
feed roller frame set
Simultaneously at that time, insert the lever connecting section
in between the roller connecting section
(2) Install the roller pressure adjusting screw
(3) Confirm that a standard clearance (Clearance gauge: 0.08mm to
0.13mm) is secured between the upper feed roller
face of the throat plate
(4) Confirm that there is proper pressure at the upper feed roller
enough to feed the material cloth.
c Pressure adjustment
o
Turning the roller pressure adjusting screw
pressure to increase.
o
Turning the roller pressure adjusting screw
causes the pressure to decrease.
(Caution) Confirm that the upper feed roller pressing shaft
be raised by both hands when installing the roller
pressure adjusting screw
2. Clearance adjustment between upper feed roller and throat plate
(1) If the standard clearance adjustment seems to be improper, loosen
two setscrews
and raise the upper feed roller pressing shaft
Insert the clearance gauge in between the upper face of the throat
plate
and the lower position of the upper feed roller
lower the upper feed roller pressing shaft
(2) Tighten two setscrews
of the guide finger
the guide support block
(3) In the state as seen from behind, confirm that the vertical clearance
of the upper feed roller
conjunction with the throat plate
(4) In the state as seen from behind, confirm that the front and rear
right/left clearances on the right side of the upper feed roller
uniformly maintained in conjunction with the feed dog
(Caution) The right/left clearance between the upper feed roller
and the feed dog
feed dog
3. Adjustment of parallelism between upper feed roller and feed dog
(1) Loosen the setscrew
to the right and left to confirm that uniform clearances are retained
in front / rear and right / left positions between the upper feed roller
and the feed dog
4. Adjustment to eliminate right and left rattling in the upper feed roller
(1) If there is right and left rattling in the upper feed roller
setscrew
and hold the guide finger
rattling, using the right/left guide plate
setscrew
.
in the frame shaft hole of the upper
. Then, tighten the setscrew
to join it.
.
.
under the condition that the bottom face
is put on to keep contact with the upper face of
.
is maintained at the standard level in
shall be confirmed while the
is positioned at the highest level.
and turn the upper feed roller pressing shaft
. Since then, tighten the setscrew
to eliminate right and left
. Since then, tighten the
and insert the upper
.
.
and the upper
,
clockwise causes the
counterclockwise
can
.
. Then,
.
are
.
.
, loosen the
– 33 –
Results of Improper Adjustment
o If the upper feed roller
the throat plate
and there is too
much pressure, this will be a
cause of cutting off the .
o If the clearance is too much
between the upper feed roller
and the throat plate
be a cause of failure in supplying
the
o If pressure of the upper feed roller
is too weak for the material
cloth, uneven feeding may arise.
touches
, this will
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