JUKI MEB-3200 Engineer's Manual page 69

Adjustment Procedures
1) Remove the presser unit, left and right.
2) Remove four side cover setscrews 1, and remove side cover
2 and side cover packing 3.
3) Call Test mode No. 5 and change over the pattern No. to cloth
cutting knife position display (Item No. 1). (See the item
"Checking the cloth cutting knife origin.)
4) Press [RIGHT ] key of the operation panel and lower knife
holder 8 to the position where knife holder 8 aligns with cloth
cutting knife 9.
5) Press [RIGHT ] key of the operation panel and raise knife
holder 8 by 1,130 pulses ( 20 mm) from the position where
knife holder 8 has aligned with cloth cutting knife 9.
Ex. 1 : When knife holder 8 and cloth cutting knife 9 have
aligned with each other, in the case where the 4-digit
LED display of the operation panel is "1250", press
[RIGHT ] key and make the 4-digit LED display
"120" (= 1250 - 1130).
Ex. 2 : When knife holder 8 and cloth cutting knife 9 have
aligned with each other, in the case where the 4-digit
LED display of the operation panel is "1040", press
[RIGHT ] key and make the 4-digit LED display "-
90" (= 1040 - 1130).
6) Change over the pattern No. to the sensor display of Test mode
No. 5 (Item No. 0).
7) Loosen two setscrews 4 in the cloth cutting origin sensor
installing plate.
8) Adjust cloth cutting origin sensor installing plate 5 in the
direction of the arrow mark "a" so that the 4-digit LED display
1] " (LED of cloth cutting origin sensor 6 lights up
lights up [
from hole 7 of the cloth cutting origin sensor installing plate).
9) Temporarily tighten two setscrews 4 in the cloth cutting origin
sensor installing plate and perform again the origin retrieval of
cloth cutting.
10) Change over to the cloth cutting knife position display of Test
mode No. 5 (Item No. 1) and press again [RIGHT
the operation panel to lower knife holder 8 to the position
where knife holder 8 aligns with cloth cutting knife 9. At this
time, make sure that the 4-digit LED display of the operation
panel is 1120 to 1140.
11) If the 4-digit LED display of the operation panel is not within
the range of 1120 to 1140, perform again the steps 4. through
9., and adjust so that the display is within the range of 1120 to
1140.
Results of Improper Adjustment
When the position of the cloth
cutting origin sensor is slipped :
™ Error No. 7 (cloth cutting knife
stepping motor origin sensor
error) occurs.
™ Step-out of the cloth cutting knife
stepping motor may occur.
™ Thread trimming failure occurs.
™ Cloth cutting knife or knife holder
may be broken.
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