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Adjusting The Needle And Feed Mechanism Timing - Brother S-7220C Instruction Manual

Single needle direct drive needle feed lock stitcher with thread trimmer
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8. STANDARD ADJUSTMENTS

8-6. Adjusting the needle and feed mechanism timing

<-4[]3>
Approx.
2 mm
39
The standard timing is for the tip of the needle to be in the
3773M
position given below when the machine pulley is turned
<-405>
forward to raise the feed dog (1) from its lowest position until
it is flush with the top of the needle plate (2).
(At this time, the "-" mark on the lower shaft will be aligned
Approx.
with the center of the scale (4) ("O" mark) on the vertical cam
4 mm
(3).)
<-4[]3>... There is a gap of approximately 2 mm between
<-405>... There is a gap of approximately 4 mm between
1. Set the stitch length dial to the maximum setting.
2. Tilt back the machine head.
3. Loosen the two set screws (5), and then turn the vertical
cam (3) sligtly to adjust the timing.
NOTE: Use the standard needle and feed mechanism
4. After adjustment is completed, securely tighten the two
screws (5).
0578D
S-7220C
the tip of the needle and the top of the needle
plate (2).
the tip of the needle and the top of the needle
plate (2).
timing.
If the timing is changed, broken needles may
occur.

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