Feed Amounts For Reverse Stitching And Condense Stitching; Needle And Feed Timing - Brother Z-8550A Service Manual

9-8. Feed amounts for reverse stitching and condense stitching

9-9. Needle and feed timing

The feed amounts for reverse stitching and condense
stitching are set using the condense dial (1).
If the stitch length for the finished stitches differs greatly from
the scale, carry out the following adjustment. (The scale is
intended as a guide.)
1. Set the condense dial (1) to "0".
2. With the reverse stitching lever (2) pushed down, turn the
machine pulley about 10 times and check that the
material feed amount is zero.
If the feed amount is not zero, carry out the adjustments
in steps 3. and 4. below.
3. Move the condense dial (1) slightly to the left or right from
the "0" position on the scale.
Repeat the check in step 2. above, and find the position
where the material feed amount is zero.
4. At the position where the material feed amount is zero,
loosen the screw (3), turn only the dial of the condense
dial (1) to align it with the "0" position on the scale, and
then secure it by tightening the screw (3).
0142B
Adjust so that the
0143B
(2) is aligned with the
connecting rod (3) when the reference line on the thread
take-up lever (1) is aligned with the mark ("B" for the 8550A,
"C" for the 8560A) on the face plate.
1. Tilt back the machine head.
2. Align the reference line on the thread take-up lever (1)
with the "B" mark (for the 8550A) or the "C" mark (for the
8560A) on the face plate.
3. Loosen the four set screws (4).
4. Turn the level feed eccentric wheel (2) to align
the mark with the
connecting rod (3).
5. Securely tighten the four set screws (4).
* After the needle and feed timing has been adjusted, also
carry out the adjustment in "9-14. Needle and rotary hook
timing".
For the 8560A, also carry out the adjustment in "9-21.
Adjusting the position of the thread trimming cam".
1181B
Z-8550A, 8560A
9. ADJUSTMENTS
mark on the level feed eccentric wheel
mark on the feed driving
mark on the feed driving
72