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TROUBLESHOOTING (Continued)
--PROBLEM--
Traverse motor
does not work.
--POSSIBLE CAUSE--
A--Traverse Motor Switch is
not on.
B--Blown fuse.
C--No voltage going to motor.
D--Bad traverse motor.
--REMEDY--
Turn on motor switch.
Replace the 2 amp slo-blo
fuse on the control board and
decrease stock removal rate.
Replace actuator bearings if
they are worn and do not
rotate freely. (For more detail,
see actuator maintenance in
the adjustment section of the
manual.)
Replace the lineal bearings in
the main carriage. Carriage
should traverse freely with a 3
lb. maximum loading. Also
check for excessive bearing
preload. (For more detail see
carriage bearing replacement
in the adjustment section of
the manual.)
Check for 90 volt DC at the
circuit board leads going to the
motor. Across terminals A1
and A2, check reading with a
voltage meter. When there is
voltage from the circuit board
but DC motor does not run,
check wiring and connections.
The voltage reading varies
with speed pot setting.
NOTE: Make sure speed pot
setting is towards the maxi-
mum dial reading for 90 volts.
Check for incoming voltage at
L1 to L2 for at least 105 Volts
AC Red power light is on.
Remove the brushes one at a
time and maintain orientation
for reinsertion. See if brush is
worn short 3/8" [9.5 mm]
minimum length, and look at
wear pattern on commuter for
arcing. Replace brushes if
necessary. Replace motor if
brushes are good.
Remove wires from A1 to A2
from the spin motor. Check
with the ohm meter for "0"
ohms across the white and
black wires.
26
TRAVERSING
--REASON--
Extremely heavy grinding
cuts cause excessive
loading of the motor.
Worn and binding actuators
causes heavy loading to
motor.
Grinding grit over a period
of time does get into the
lineal bearings and causes
excessive drive torque of
carriage.
This checks to see that
voltage is getting to the
control board.
A short brush does not
make an adequate electrical
connection to run the
electrical motor. NOTE:
Brushes are long lived and
seldom need replacing.
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