Tormach 8L - Page 65

7: TROUBLESHOOTING
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Specifications subject to change without notice.
Page 65 UM10753: 8L Operator's Manual (Version 0321B)
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Cause: There's a defective or malfunctioning axis driver.
Probability How-To Steps Need More?
Medium
1. Power off the machine (see "Power Off the Machine" (page35)).
4. On the malfunctioning axis driver, replace the ribbon cable connector for
the control signals and the motor/DC supply connector with those from a
functioning axis driver.
6. Power on the machine (see "Power On the Machine" (page33)).
7. Jog the malfunctioning axis in both directions.
If the malfunctioning axis now moves properly, then it's likely that the
malfunctioning axis driver is defective.
8. Jog the functioning axis in both directions.
A defective malfunctioning axis driver is confirmed if the previously
functioning axis has the same problem.
Swapping control signals between axis
drivers is very helpful during
troubleshooting (there are at least
three identical axis drivers in this
subsystem).
Note: If control signals are
switched from the driver on
the non-functioning axis to a
driver on a functioning axis,
the end of travel limit switch
on the non-functioning axis
won't work. Take care to
avoid reaching the end of
travel when moving an axis.
Cause: There's a blown fuse on the DC-BUS board.
Probability How-To Steps Need More?
Medium
1. Power off the machine (see "Power Off the Machine" (page35)).
2. Remove the cover from the DC-BUS board.
3. Measure the continuity on each fuse with a multimeter. Then, visually
inspect each fuse.
If a fuse is blown, replace it with an equivalent fuse.
A blown fuse usually is the result of a
defective drive or wiring. Inspect the
axis' wiring carefully and repair any
damage observed. If you replace a fuse
and it immediately blows, it's likely a
defective axis drive or its wiring.
Cause: There's a loose axis motor coupling.
Probability How-To Steps
Low
l Jog the axis and listen to determine if you can hear the motor run.
l Remove the cover plate over the coupling and make witness marks to determine if the motor's turning but the screw
isn't.