Adjusting The Vertical Feed Amount - Brother S-7300A Service Manual

7. ADJUSTMENTS
7-5-5.

Adjusting the vertical feed amount

Normally this adjustment is not necessary.
In cases such as the following, adjusting the vertical feed amount may be useful for solving problems.
If the feed dog height is set to a high level when sewing heavy-weight materials, the vertical movement of the feed dog
・
may be insufficient and the material may be fed backwards by mistake.
・ If the feed dog height is set to a low level when sewing extra light-weight materials, the vertical movement of the feed
dog may be too great and the stitch length may become too short.
Reference
line
-[][]3
standard
position
Vertical feed amount becomes
smaller
125
Vertical feed amount becomes
larger
-[][]5
standard
position
1084D
1. Loosen the screw (1).
2. Adjust the position of the vertical feed crank using the
reference line position as a reference.
3. Tighten the screw (1).
4. Adjust the needle and feed timing. (Refer to "7-5-4-3.
Adjusting the needle and feed mechanism timing ".)
5. After adjusting, turn on the power and turn the pulley by
hand to operate the sewing machine, and check that none
of the drive parts touch any other parts.
S-7300A