from the motor slips and isn't driving the innards. Also the
position where your
timing is adjusted may have worked loose.
Perhaps you could give a little
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note the details. 1. When the two loopers pass. their relative
position left and right is critical, as is the distance apart from factor..as this dictates the relative
position for all other movements and
timing. I have just looked through a service manual for a similar
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needle in ascending travel of the needle bar from its lowest
position, at the right needle drop
position, the distance between the upper 3.3 ± 0.3 mm. You also need to look at the
timing HOOK
TIMING With the needle bar swung to the right at
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bobbin thread. So I don't think anything is wrong with the
timing. I also don't think anything is wrong with the side-to-side positioning of the needle bar; the needle strikes just at the midpoint
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came across it today. What model machine do you have ?
Timing is fairly straightforward.......if a top loader, then: Remove the bobbin case, the needle (as it rises).......the zigzag will be in the left
position of it's swing (so the hook is travelling it's greatest
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put everything back together you need to adjust the hook/needle
timing and clearances. Quite frankly, this is a major job and it in case you want to tackle it, the hook must be positioned so that it almost touches the needle(with the saddle assembly) and
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bobbin thread all the time the needle moves to the right positions for the stitches but does not produce the correct stitch I results. I don't know anything about how to check the
timing but think this may be a factor any help would be
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