Singer Confidence 7463 Service Manual page 35

FEED CONTROL UNIT - Full step version
A. Position of pulse motor gear at origin point
Rotational ratio of gear (A) vs pulse motor gear (B) is 1:5. Rotation of motor gear (A) is 7.5 degrees (1 step
per 1 pulse) resulting in the gear (B) rotated at 1.5 (7.5 divided by 5) degree.
There are 48-step exciting positions (segments) with 7.5 degree rotation per 1 step on the pulse motor.
Therefore, 7.5 degree rotation per 1 pulse coincides with all exciting positions.
Stitch length is set at 0.25 mm for rotation of motor gear (A) of 7.5 degrees per 1 pulse.
B. Position of feed regulator at maximum forward feed
Maximum possible forward feed amount is 4.5 mm from the position shifted 7.5 degrees with 2 pulses from
the origin point.
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Added: January, 2006