Adjusting And Checking The Stop Position Of Sewing Machine - JUKI LU-1520NCS-7 Instruction Manual

32. ADJUSTING AND CHECKING THE STOP POSITION OF SEWING MACHINE

[Needle-down stop position]
A B
After setting up the machine head on the table, set up the stop position of the machine.
* If the stop position is not set, it may cause malfunction of the thread trimming.
[Needle-down stop position]
1) Set "0" for the SC-922 function setting No. 10.
2) Step the pedal lightly to idle the machine for a few stitches, and then stop. (At this time, do not thread the
needle, keep the presser down, and use no sewing object.)
3) Check the position of the handwheel (engraved marker position).
Check that the "arm engraved point A" of the arm side and the "yellow engraved point B" of the hand-
wheel are matched.
4) If the "yellow engraved point B" does not match, loosen the screw ❶ on the "L" marker side of the hand-
wheel, and adjust the position within the long hole range.
5) After adjustment, tighten the screw ❶ .
6) Repeat step 2) and 3).
[Needle-up stop position]
1) Set "1" for the SC-922 function setting No. 10.
2) Step the pedal to idle the machine for a few stitches, and then stop. (At this time, do not thread the nee-
dle, keep the presser down, and use no sewing object.)
3) Check the engraved marker position of the handwheel.
Check that the "arm engraved point A" of the arm side and the "white engraved point C and the center
of the white engraved point C" of the handwheel are matched.
4) If the "white engraved point C and the center of the white engraved point C" does not match, loosen the
screw ❷ on the "U" marker side of the handwheel, and adjust the position within the long hole range.
5) After adjustment, tighten the screw ❷ .
6) Repeat step 2) and 3).
7) Set "0" for the SC-922 function setting No. 10. (Restore.)
8) Set "0" for the SC-922 function setting No. 56.
9) Step the pedal to idle the machine for a few stitches, and then stop.
10) Reversely tread on the pedal to trim the thread.
11) Check the position of the handwheel (engraved marker point) after the thread trimming.
Check that the "arm engraved point A" of the arm side and the "white engraved point C and the center
of the white engraved point C" of the handwheel are matched.
12) If the "white engraved point C and the center of the white engraved point C" does not match, loosen the
screw ❷ on the "U" marker side of the handwheel, and adjust the position within the long hole range.
13) After adjustment, tighten the screw ❷ . Repeat step 9) to 12) and check the stop position.
14) After adjusting the stop position, set "1" for SC-922 function No. 56. (Restore.)
* Steps of procedure 8) through 14) represents the checking procedure which helps reduce variation
in the stop position.
* In the case of LU-1520NCS-7, the signals related to the thread trimming are detected with reference
to the upper position, therefore, if the upper stop position (white engraved point C and the center of
the white engraved point C) are off, it may cause malfunction of the thread trimming.
[Needle-up stop position]
A C
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❶
❷