JUKI IP-100A Engineer's Manual page 17

Adjustment Procedures
[Feed 0 adjustment]
For the adjustment of feed 0 position, perform fine adjustment of the
direction of rotation of feed adjustor 1.
1) Tilt the machine head and loosen two setscrews 2 in the stepping
motor link C.
2) Adjust feed link shaft 3 to the slippage amount of feed using a slotted
screwdriver and temporarily tighten two setscrews 2 in the stepping
motor link C.
* Feed link shaft 3 consists of eccenric pin.
Normal feed
large
Reverse feed
small
3) Return the machine head to the home position, turn ON the power, set
the operation panel to straight stitching, and set normal feed amount
to "0".
* Set the speed variable resistor of operation panel to the extreme left
end and set the sewing speed to 200 rpm.
4) Insert a sheet of paper under the presser foot and depress the pedal
to operate the sewing machine.
At this time, check the needle entry on the paper to check that feed
amount becomes "0".
5) When feed amount is "0", tilt the sewing machine head after turning
OFF the power and securely tighten two setscrews 2 in the stepping
motor link C.
After securely tightening the setscrews, check that feed adjustor 1
smoothly moves with the presser foot lifted.
When the feed amount does not become "0", turn OFF the power
again and repeat the work of steps 1) and 2).
[Feed 0 adjustment] : When feed amount does not become "0" by
adjusting feed link shaft 3 only.
1) Loosen three fixing screws 4 in the feed stepping motor unit and
perform the vertical adjustment of feed stepping motor unit 5.
2) After the adjustment, check that feed adjustor link 6 smoothly moves
with the presser foot lifted.
3) The standard that feed adjustor link 6 smoothly moves is the feed
mechanism torque (less than 700g by the spring balancer) before
setting the feed stepping motor unit. (Be sure to perform the centering
work so that the torque is less than 1,000g.)
[Normal/reverse feed amount control]
1) Input max. feed amount limitation value of normal/reverse feed with
the information of operation panel
* For the information operation, refer to Instruction Manual.
* Normal/reverse feed amount has been factory-set to the standard
adjustment value of JUKI standard delivery gauge (Part No. 40018430
... max. feed amount of normal/reverse stitching is 5 mm).
There are cases where the feed amount varies from the actual input
value in accordance with the material used or kind of gauge. Then
perform the input compensation.
Results of Improper Adjustment
™ Start the work of the feed amount
"0" adjustment after performing 3-
(2)-2) Adjusting the feed timing (A-
SR only).
Normal feed
small
Reverse feed
large
™ When there is a torque, one-sided
worn-out of feed link or step-out of
feed stepping motor 5 will be
caused.
™ When there is a torque, one-sided
worn-out of feed link or step-out of
feed stepping motor 5 will be
caused.
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