HEIDENHAIN TNC 415 (259 9x0) Service Manual User Manual
Page 16
SERVICE MANUAL TNC 415B/425
Page
13
Issue: 20.08.95
Error Messages GROSS POSITIONING ERROR:
Axes with Integrated Digital Speed Controller
Display (blinking)
Error Cause
GROSS POSITIONING ERROR
<AXIS> YA
GROSS POSITIONING ERROR
<AXIS> YB
GROSS POSITIONING ERROR
<AXIS> YC
GROSS POSITIONING ERROR
<AXIS> YD
GROSS POSITIONING ERROR
<AXIS> YE
GROSS POSITIONING ERROR
<AXIS> YF
Positioning (Servo Lag) Monitoring
- Operation with feed forward control:
position monitoring range exceeded
(range defined in MP1420.X)
- Operation with servo lag:
servo lag monitoring range exceeded
(range defined in MP1720.X)
- Operation with gantry axes:
positions of master and slave axes deviate by more than
the value set in MP855.X. (displayed axis = slave axis)
Monitoring of the Analogue Voltage Limit
- The nominal voltage calculated by the control has
reached its limit of
±
10 V (
±
20 V for spindle).
(only with feed forward control)
Movement Monitoring
- The difference between the path information of the
position encoder (LS) and that of the speed encoder
(ROD) has reached the tolerance limit defined in
MP1970.x.
Standstill Monitoring
- The deviation from the nominal position of an axis in
standstill has exceeded the value programmed in the
machine parameter MP1110.x.
Monitoring of the Offset Voltage
- The offset voltage limit of 100mV has been reached
during an automatic offset adjustment with MP1220.
Monitoring of the Integrated Digital Speed
Controller
- The monitoring limit of the integrated speed controller
Y = CPU number 1 = main processor
2 = geometry processor
3 = CLP processor
Error Location
When the error message GROSS POSITIONING ERROR is displayed, the error may be located
in any element of the closed loop.
e.g.: - Error in control (e.g. CLP board)
- Excessive offset voltage at the servo amplifier
- Monitoring function of servo amplifier has responded
(e.g. monitoring of current intensity)
- Electrical defect at the servo amplifier
- Motor, tachometer, encoder or cabling defective
- Mechanical error (bearing, spindle, guides)
- Excessive mechanical forces on a drive