Adjustment Of The Zigzag Width For Bh Right Over Edging - promelectroavtomat XL2120 Service Manual

Adjustment

8. Adjustment of the zigzag width for BH Right Over Edging

• The zigzag width for BH right over edging should be so that the difference with the zigzag width of BH left
over edging (BH b) is 0.2 mm or less.
1 Attach a J presser foot, lower the presser lever, and attach a cover.
2 Turn the selection dial to select the BH left over edging (BH b).
3 Attach a BH presser foot.
4 Hold a piece of paper by hand and turn the pulley to pierce the paper with the tip of the needle.
5 While holding the piece of paper by hand, turn the selection dial to select the BH right over edging (BH d).
6 Hold the piece of paper by hand and turn the pulley to pierce the paper with the tip of the needle.
7 Check the zigzag width of right over edging against that of left over edging.
8 Loosen the screw (Screw, pan M 3 × 8) of the adjusting nut. (Lower right screw)
9 Turn the adjusting nut with a spanner to adjust the zigzag width of right over edging to make it equal to that
of left over edging.
0 Tighten the screw (Screw, pan M 3 × 8) of the adjusting nut.
A Repeat steps 1 through 5 above to check the zigzag width again.
a b
| a - b | ≤ 0.2mm
3 - 8
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