Adjustment Of The Amount Of Needle Bar Rise - promelectroavtomat XL2120 Service Manual

Adjustment

12.Adjustment of the Amount of Needle Bar Rise

• When a needle (#14) is raised by 2.9 to 3.3 mm above the lowest point of its zigzag (max.) left needle down
position, the rotary hook point should be even with the perimeter of the needle.
1 Attach a J presser foot, lower the presser lever, and attach a cover.
2 Select the maximum zigzag width.
3 Turn the pulley by hand to bring the needle to the lowest point of its left needle down position.
4 Loosen the two screws (Set screw, socket, FT, M5 × 5) on the lower shaft pulley.
5 Adjust assembly of the lower shaft and the lower shaft pulley so that the right edge of the needle and the
rotary hook point are even when the needle bar is raised by 2.9 to 3.3 mm above the reference line of the
needle bar's lowest point.
6 Tighten the socket type set screws (Set screw, socket, FT) on the lower shaft pulley to secure it.
2.9 - 3.3mm
2.9 - 3.3mm
3 - 12
Lower shaft pully D
The right edge of the needle and the tip
coincide at a point 2.9 - 3.3 mm above the
lowest point for the needle
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Set screw, socket
(FT) M5 × 5 (three)