40
Guiding of the feeding movement
Pre-setting of the step motor
Do not mount the step motor but connect the flat
cable from the front panel, transformer and step
motor to the circuit in the rear cover. Note that the
wire of the step motor is connected to the lower
out let on the printed circuit. Loosen the screw
(11/7) in the driving gear until it can be turned
on its shaft. Connect the machine and turn on
the main switch. Note that the fork and eccentric
must be in such a position as to enable the
handwheel to be turned. Press the button for
straight stitching and set at maximum stitch
length. Insert a 0.5 mm feeler gauge at the left
stop of the drive wheel and push the cog segment
until the cog wheel is resting on the feeler gauge.
Turn the handwheel 2-3 revolutions and stop with
the needle in the lower position. The step motor
is now at its electrical starting point. Retain
some axial play in the cog wheel and well tighten
the stop screw (11/9), but do not overdo it. If the
reverse feeding button is depressed, the
segment will change sides but the stop
is fixed at 6.5 mm reverse feed and
the-machine will only sew 3.5 mm in reverse.
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