VM Series Maintenance and Safety Manual 704-0212-209 Machine Maintenance 3- 43
If a machine malfunction occurs, then consider the following issues:
• Is another machine that uses high current connected to the AC distribution
power supply line?
• Is the ground impedance of the AC distribution power supply line sufficient?
• Are there fluctuations in the input voltage to the machine?
• Is there a source of “noise” nearby (crane, welder, etc.)?
• If other CNC or NC machines are connected to the same group of circuits, do
any of those machines demonstrate similar problems?
• Was another machine operating at the same time the problem occurred?
• Does the problem occur mainly at a certain time of day?
Coolant System
Refer to the table below if a problem occurs with the coolant system.
Table 3–21. Troubleshooting: Coolant System
Motion and Spindle Rotation
Refer to the table below if a problem occurs with the spindle unit.
Table 3–22. Troubleshooting: Spindle Unit
Power surges can occur when large loads are suddenly placed on, or
removed from, an electrical system.
Problem Cause Solution
Coolant flows
slowly or stops.
• Clogging due to
dirty coolant.
• Pump is not
working properly.
• Flush lines, clean filters, drain and refill
the system with fresh coolant.
• Check and service the pump. For mist
system, check shop air pressure.
Coolant fails to
start.
• Coolant is not
programmed to be
On.
• Coolant pump not
working.
• Check the operating mode (auto or
manual) or programming.
•Check connector.
Cause Solution
Program might not have proper
RPM setting.
Check the RPM setting in the program. If this setting is
wrong, check and correct the entire program.
Spindle drive breaker is tripped. Power down the machine, reset the breaker on the
spindle amp, and turn on power.
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