Singer 20U - Knee Operating Stitch Width Control

KNEE OPERATING STITCH WIDTH CONTROL
A knee operated bell crank complete (A and B) shown in the
sketch at right is fastened to the underside of the bed. Bell crank A
is used for lifting the presser foot, and bell crank B is used for regu-
lating the stitch width with your knee.
To control the width of zigzag stitches with your knee and leave
both hands free to handle the fabric, loosen screw D and move lift-
ing arm C so that it is positioned just under the bell crank B; then
tighten screw D.
The stitch width can now be controlled from zero to maximum
width of 9 mm with your knee by pushing the knee plate E to the
right. The further you push the knee plate to the right, the wider
the stitch width you will obtain.
NOTE: The presser foot cannot be raised with the knee lifter when
machine is set up for knee operating stitch width control. If there
is an occasion you wish to use the knee lifter, merely move lifting
arm C away from you and position it just under bell crank A.
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