Needle Zigzag Load; Needle And Rotary Hook Timing - Brother Z-8550A Service Manual

9-13. Needle zigzag load

9-14. Needle and rotary hook timing

This adjusts the resistance load for needle zigzagging.
1. Turn off the power switch.
2. Loosen the nut (1).
3. Tighten the screw (2) to increase the needle zigzag load.
* Adjust so that the load is 12-15 N.m when the needle
bar (3) moves sideways.
4. Securely tighten the nut (1).
* Be careful not to turn the screw (2) at this time.
* After adjusting, check the needle zigzag load again.
1150B
1. Turn on the power switch.
2. Press the TEST key (1) and check that the TEST icon (2)
illuminates.
(For safety purposes, be sure to carry out this step. it
prevents the motor from operating even if the treadle is
depressed.)
3. Set both the zigzag width and the zigzag base line
position to "0".
(Refer to "6-2-4. Setting the zigzag base line position"
and "6-2-5. Setting the zigzag stop position" of the
Instruction Manual.)
3523M
Z-8550A, 8560A
9. ADJUSTMENTS
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