JUKI AMB-289, Engineer'S Manual

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4) Adjusting the top feed sensor in the vertical direction
1. Set the button gauge supplied with the chuck as accessories.
2. Display K57 of level 2 of the memory switch. (At this time, set the
parameter display to “0”.)
3. Adjust the sensor position so that the clearance between the
bottom side of the chuck and the top side of the tongue stopper
becomes 0 to 0.5 mm when the pedal is depressed once to
perform origin retrieval.
4. To change the position of sensor, loosen setscrews , move sen-
sor along the slit, and fix setscrews .
5. Correct the value of K57 so that the clearance between the bottom
side of the chuck and the top side of the tongue stopper
becomes 0 to 0.1 mm. After changing the value of K57, depress-
ing the pedal replaces the pre-corrected clearance with the cor-
rected clearance.
(Caution) The chuck and tongue stopper should be self-
supported.
5) Adjusting the sensor of loader
1. Display K59 of level 2 of the memory switch. (At this time, set the
parameter display to “0”.)
2. Move the position of sensor so that the distance from the center
of needle to the front edge of button set pin is 29.5 mm when
depressing the pedal once and performing the origin retrieval.
3. To change the position of sensor , loosen setscrew , move
sensor along the slit, and fix setscrew .
4. After performing the adjustment of 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 K59.
6) Adjusting the thread drawing motor sensor
1. Fix the position of sensor with setscrews which are symmetri-
cally set from the center of the slit.
2. Display K58 of level 2 of the memory switch. (Set the parameter to
0 at that time.)
3. Loosen the setscrews and adjust the position of the thread guide
No. 2 so that the strained thread hardly touches the upper
side of the thread drawing hole (of thread guide No. 2 ), then
tighten the setscrews again.
Adjustment Procedure Results of Improper Adjustment