BUG-O Systems AGS-4000 - Manual (Page 41)

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ARC GOUGING MODULAR DRIVE TROUBLESHOOTING GUIDE, (CONT’D.)
PROBLEM POSSIBLE CAUSE TEST BASE SYSTEM TEST PROCEDURE / REMEDY
No tractor Faulty Control 2F Install one voltmeter lead on TP4 and the other lead on TP5.
speed control module, speed Turn on the main power. Set the control module for continuous
and display card, or motor. forward tractor motion. If the control module has any type of
is lit. motion enable switch, turn it to enable. Rotate the tractor speed
control knob while observing the voltmeter output. It is possible
to vary this voltage between 0 and 8 volts DC using a good
control module.
a) if the voltage does not vary, replace the control module card.
b) If the voltage does not vary, turn the machine OFF and then
ON using the main power switch. Observe LED L5. L5
should light for a moment or two during power-up while
safety circuits hold the tractor OFF until full power is
reached. L5 should turn OFF indicating power is reached.
L5 should turn OFF indicating power has been applied to
the motor and motion should start.
1) If the L5 never lights, replace the speed card.
2) If the L5 turns ON, turns OFF, and then turns ON, check for
shorted motor connections. If none are found, replace the
speed card.
3) If the L5 turns ON and stays ON, check that the control
module is set up as defined above and retest 2T. A second
failure indicates a bad speed card. Replace Speed Card.
4) If L5 turns ON and then OFF and the motor doesn’t start
running, thru the tractor speed up. If the motor does not
begin to turn, check the motor speed card wiring for faults
and repair as needed. If the motor still fails to turn, replace
the speed card.
Tractor High Frequency 3A Turn OFF ARC GOUGING unit. The unit should operate
Moves a short Interference normally.
distance and
then stops 3B Verify load on the carriage does not exceed the factory
rating.
3C Remove unit from track and set the controls to forward
tractor motion. If the pinion motion stops after a short time or
a check shows that the weight placed on the machine is not
excessive, then the problem is most likely brake related.
Return machine for repair.