February 2012 21 – 351
21.2.4 Possible error causes
Excessive machining feed rate
Spindle speed too low
Blunt tool
Insufficient lubrication
Mechanical shock, strong machine vibrations
Mechanical stiffness
Wear and tear of mechanical parts, aging of the machine tool
Mechanical defects
Fault in hydraulics
Fault in pneumatics
Overloaded driver
Motor (carbon brushes, tachometer brushes, winding, etc.) defective
Servo defective
Defective cables
Insufficient contacting
Poor shielding and grounding
Excessive drift
Defective speedometer
Nominal speed value interface of CMA-H defective
21.2.5 Sequence for finding errors in the control loop
In the event of error messages related to movement, acceleration or standstill, for example:
Positioning error
Excessive servo lag
Nominal speed value too high
Movement monitoring
Standstill monitoring
or if there are problems such as:
Poor workpiece quality
Unusual noise during axis movements
Unusual vibrations
... you can check machine components in a defined order to find the fault.
--> See ”Sequence for finding errors in the control loop” on page 6 – 58.
There is a large variety of possible error causes.
Profound knowledge of the machine and the interaction of the components is very helpful
especially for this type of errors.
When error messages are generated, press the HELP key.
You will obtain information on possible error causes and tips for corrective action.
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