Chapter 10
197
UM10350_PCNC770_Manual_0916A
Troubleshooting
Axis Drive Subsystem Checklist
Table 4.4
DC bus power distribution
The DC bus board contains four fuses which are used to individually fuse power to the axis driver modules.
A fth fuse is provided on the supply boards for the Z-axis brake. Fuses are noted on the circuit board.
Note that the control power circuit must be on (Machine LED is on).
Fuse Number on DC
Bus Board
Function
Wire Numbers to
Monitor with Common
Lead (0V) listed rst
Voltage when DC
Bus is OK and When
Fuse is Good
F1 X X-axis 163 164 55-75 VDC
F2 Y Y-axis 165 166 55-75 VDC
F3 Z Z-axis 167 168 55-75 VDC
F4 A A-axis 169 170 55-75 VDC
F5 Brake Brake for Z-axis 326 327 55-75 VDC
Axes Drive Subsystem Checklist
Table 4.5
Axis movement is extremely noisy or bumps
Possible Cause Probability Action to Identify Cause of Problem Discussion
Loose wire
connection or
failed connector
High/Low
Power off and tighten all screw
connections
Inspect green power
connector for signs
of overheating.
Defective axis
driver module
Medium See Table 4.2
There have been cases of
a noisy axis relating to a
defective driver. This may be
temperature dependant.
Failing controller,
or controller not
suited for M3
Low Contact Tormach Technical Support
A aky controller will not
produce smooth step signals
for good axis motion.
Loose sheet metal High Feel for vibrating sheet metal
Often loose sheet metal is
mistakenly diagnosed as a noisy
axis motor. On some systems,
certain axis motor speeds can
cause excessive vibration in
the sheet metal stands. Identify
problem areas and treat with
butyl tape or silicone sealer..
(connued on next page...)
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