MICRO PRODUCTS GP0, Service Manual

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6.0 SPECIAL ADJUSTMENT
6.1 HEADPIECE CLOSED SPACE ADJUSTMENT
Closed space between dies should be 7/32” when the space-
adjusting cam is set at zero.
To make this adjustment first move the space-adjusting cam
to zero, then check the spacing between the dies.
If the space between the dies is not 7/32” at this time,
loosen the locknut on the space adjusting screw. Turn screw
clockwise for more space and counterclockwise for less
space. Once space has been set tighten the locknut on the
space adjusting screw.
6.2 OPEN SPACE ADJUSTMENT
This adjustment determines the amount of upset burr. The
adjustment is made by the space-adjusting cam. A pointer
reflects the cam positioning. Refer to accompanying charts
for approximate settings.
6.3 WELD LIMIT SWITCH
Do not put any wire in the dies when making this
adjustment. Set the space-adjusting cam at #1 on cam. With
a voltmeter measure across the clamp fingers with power
applied to the welder. Press the weld button. The voltmeter
reading should be approximately one VAC with welder at the
highest heat setting. If no voltage is read move the space
cam to higher number. Return the cam to #1 while watching
the voltmeter. The voltage should shut off at #1 on the
cam.
Loosen locknut on the limit switch adjusting screw and
adjust until the welder shuts off at #1 on the space-
adjusting cam. After setting tighten locknut on the limit
switch adjusting screw.
6.4 UPSET PRESSURE
Upset pressure adjustments are obtained by rotating knurled
knob on right hand side of stationary headpiece. When
outside edge of upset adjusting screw is flush with outside
edge of thumb knob, movable headpiece should just close
when pulled to the left by hand. A calibrating screw and
nut located on right hand headpiece will assist in setting
the neutral position. Accompanying charts will assist in
correct setting for neutral position. Accompanying charts
will assist in correct setting for various sizes of wire.
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