JUKI AMB-289, Engineer'S Manual

Page: 39 / 177

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1) Adjusting the needle throwing motor origin sensor
1. After assembling the needle throwing components, turn ON the
power to display K51 of level 2 of the memory switch. (At this time,
set the parameter display to “0”.)
2. Move the position of sensor to the direction of arrow mark so
that the needle is positioned to align with engraved marker line
A
on the machine bed when depressing the pedal once and per-
forming the origin retrieval.
3. To change the position of the sensor, loosen setscrews , move
sensor along the slit, and fix setscrews .
4. Compensation of the needle throwing motor origin
o After performing adjustment of the sensor, when the needle is
out of the center, compensation of the position can be performed
with the panel.
o Display K51 of level 2.
o By changing the parameter, compensation can be performed to
the right and left sides up to 5 mm.
2) Adjusting the bottom feed origin sensor (Adjust after confirming that
the needle throwing motor origin has been adjusted.)
1. Display K54 of level 2 of the memory switch. (At this time, set the
parameter display to “0”.)
2. Move the position of sensor to the direction of arrow mark so
that the needle aligns with position
B
of tongue stopper in the
longitudinal direction when depressing the pedal once and per-
forming the origin retrieval.
3. To change the position of the sensor, loosen setscrews , move
sensor along the slit, and fix setscrews .
4. Compensation of the bottom feed motor origin
o After performing adjustment of the sensor, when the tongue stop-
per in terms of the needle is out of the position, compensation of
the position can be performed by changing the parameter of
K54.
o By changing the parameter, compensation can be performed to
the front and rear sides up to 5 mm.
3) Adjusting the top feed origin sensor (Adjust after confirming that the
needle throwing motor origin has been adjusted.)
1. Set the button gauge supplied with the chuck as accessories.
2. Display K52 and K53 of level 2 of the memory switch. (At this time,
set the parameter display to “0”.)
3. Position where the needle aligns with the hole in the center of the
gauge is the position of origin when depressing the pedal once
and performing the origin retrieval.
4. Move the position of position sensor in the longitudinal direc-
tion to the direction of arrow mark.
5. To change the position of sensor, loosen setscrews , move sen-
sor along the slit, and fix setscrews .
6. Adjust the sensor position in the X direction by changing the pa-
rameter of K52 in memory switch level 2 because the sensor posi-
tion is physically fixed.
7. By changing the parameter, adjustment can be performed to the
right and left sides up to 2 mm.
8. For the adjustment of the position in the longitudinal direction, com-
pensation of the position is performed by changing the parameter
of K53 of level 2 of the memory switch.
9. By changing the parameter, compensation can be performed to
the front and rear sides up to 5 mm.
Adjustment Procedure Results of Improper Adjustment