Singer 471U - Adjustment of Feed Cam Segment

im Adjustment of feed cam segment
When theseadjustments are not complete,the timingfor the bar tackingperiodsand thetenison releasingwillbe
adversely affected, resulting in thread breakage or uneven stitches.
1. Position adjustment of stop cam segment
1. Turn the handle with the machine in the stopped
position until the two screws O are in a position
where they can be easily removed.
2. Loosen the two screws and then tighten them
again after moving the stop cam segment AO to its
lowest position.
2. Position adjustment of tension releasing cam segment B
Loosen the two screwsO and adjust the position of the tension releasingcam segment
BO so that the auxiliary
tension disc stops the slack one to three stitches before the end of bar tacking in the inner bar tacking. When the
slack period for the auxiliary tension disc is too early, the seam will tend to the left as in Fig. A, and when the
slack period is too late, the seam will tend to the right as in Fig. B.
3. Position adjustment of tension releasing cam segment F
Upper thread is
no sewn.
Uneven stitch
Loosen the two screws0 and adjust the tension releasingcam segment F O so that the period for the tension
releasingat the beginning of sewing ends after two to three stitches. When the slack period of the auxiliary
tension disc is early, the end of the thread will slip out of the scissors, and when it is late, the puarl will be
adversely affected.
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From the library of: Superior Sewing Machine & Supply LLC