HEIDENHAIN TNC 306 Service Manual - Manual (Page 13)

SERVICE MANUAL TNC 306/360
Page 9
HEIDENHAIN Service
Screen Display
(blinking error message) Error Cause
GROSS POSITIONING ERROR
<AXIS> A
GROSS POSITIOINING ERROR
<AXIS> B
GROSS POSITIONING ERROR
<AXIS> C
GROSS POSITIONING ERROR
<AXIS> D
GROSS POSITIONING ERROR
<AXIS> E
GROSS POSITIONING ERROR
<AXIS> F
Position Monitoring (Servo Lag)
- Operation with feed pre-control:
position monitoring range exceeded (range defined
in machine parameter 1420)
- Operation with servo lag:
servo lag monitoring range exceeded (defined in
machine parameter 1720)
Monitoring of the Analog Voltage Limit
- The nominal voltage calculated by the control has
reached its limit of
±
10 V (only with feed precontrol).
Movement Monitoring
- The voltage difference calculated by the control has
reached the limit programmed in the machine para-
meter 1140.
Standstill Monitoring
- The deviation from the nominal position of an axis in
standstill has exceeded the value programmed in
machine parameter 1110.
- The nominal position was moved beyond during
positioning (overshooting).
Monitoring of Offset Voltage
- The offset voltage of 100 mV has been reached during
an automatic offset adjustment with machine parameter
1220. (see section 16.5)
Central Drive Monitoring
- An error in the configuration of the central drive has been
detected (e.g. two analog outputs are active
simultaneously).
Possible location of the error, when the error message
"GROSS POSITIONING ERROR <AXIS> A/B/C/D/E/F" is generated:
When this error message is generated, the error may be located in any element of the
closed loop.
e.g. - Control error (e.g. CLP board)
- Excessive offset voltage at the servo amplifier
- Monitoring function of the servo amplifier has responded
(e.g. power monitoring)
- Servo amplifier defective
- Motor, tachometer, encoder or cables defective
- Mechanical defect (bearings, spindle, guides)
- Excessive mechanical forces on a drive