Timing Of Needle Bar And Feed - Brother BL6200 Service Manual

4. TIMING OF NEEDLE BAR AND FEED (B341 ⋅ B349 ⋅ B351 ⋅ B352)
STANDARD
When the needle bar is at its highest position, the mark on the horizontal feed cam should be at its topmost
position.
(Horizontal feed should start when needle bar reaches at the position of -7 ~ -17° from its highest position.)
(Turn the pulley counterclockwise.)
ADJUSTMENT
1. Set pattern dial to straight stitch and stitch length to "4".
2. Loosen two screws on eccentric counter weight.
3. Adjust the eccentric counter weight so the needle is at its highest point when the mark on the horizontal
feed cam of the upper shaft is at its topmost position.
4. Tighten two screws.
5. Make sure that timing was adjusted correctly by turning the pulley counterclockwise.
6. Loosen two screws of thread control cam.
7. Fit the both marks of thread control cam and eccentric counter weight by turning the thread control cam.
8. Tighten two screws.
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