Brother Z-8550A Service Manual download pdf (Page 85)

Z-8550A, 8560A

9. ADJUSTMENTS

9-13. Needle zigzag load

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.

9-14. Needle and rotary hook timing

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.)

(Continued on next page)

3523M

1150B

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Brother Z-8550A Service Manual Page 85