HEIDENHAIN TNC 407 (243 020) Technical Manual - Manual (Page 211)

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TNC 407/TNC 415/TNC 425 3 Servo positioning of the NC-axes 01.98
3.5.3 Monitoring the analogue voltage
Monitoring of the analogue voltage is only possible in operation with feedforward control.
If it exceeds 10 V, the flashing error message
"Gross positioning error B"
is displayed.
3.5.4 Movement-monitoring
The movement-monitoring functions in operation with feedforward control as well as with lag.
During movement monitoring, the actual path travelled is compared with a nominal path calculated
by the NC at short intervals (several servo cycles). If, during this period, the actual path travelled
differs from the calculated path, the flashing error message
"Gross positioning error C"
is displayed.
In machine parameter MP1140 a voltage can be stored, below which the movement-monitoring is
out of action.
If 10 [V] is entered in this machine parameter, the movement-monitoring becomes
inactive. It is not possible to operate the machine safely without movement
monitoring.
MP1140 Movement monitoring
Entry: 0.030 to 10.000 (V)
MP1140.0 Axis X
MP1140.1 Axis Y
MP1140.2 Axis Z
MP1140.3 4th axis
MP1140.4 5th axis