HEIDENHAIN CNC Pilot 4290 - Manual (Page 358)

7 Parameters 346
Continued
7.2 Mac
hine P
a
ra
met
ers
Parameters, C-axis (continued)
1020, 1070 Angle compensation in C axis – Parameters are entered by the machine tool builder.
1021..1026, 1071..1076 Compensation values of C axis – Parameters are entered by the machine tool builder.
Parameters for linear axes
1107, 1157, ... Backlash compensation, linear axes
In backlash compensation the ”value of backlash
compensation” is calculated into every change in
direction.
■ Type of backlash compensation
■ 0: No backlash compensation
■ 1: Encoder is built into the motor. The backlash compensation
accounts for the reversal error between the motor and table. During
each change in direction, the nominal value is adjusted by the value
entered in the ”backlash compensation value” option.
■ 2: With direct measurement, the backlash compensation
compensates the reversal error between the motor and encoder.
During each change in direction, the nominal value is corrected by the
value entered in the ”Backlash compensation value” option.
■ Backlash compensation value:
■ For type=1: compensation value with positive sign
■ For type=2: compensation value with negative sign
1110, 1160, ... Load monitoring, linear axis
Evaluation: Load monitoring
■ Start-up time for monitoring [0..1000 ms] – (evaluated if ”Omit
paths of rapid traverse” is active) The load monitoring function is not
activated if the nominal acceleration of the spindle exceeds the limit
value (limit value = 15% of acceleration ramp / brake ramp). As soon
as nominal acceleration falls below the limit value, the monitoring
function is activated after the start-up time for monitoring has elapsed.
■ Number of measured values to be averaged [1..50]: The mean value
is calculated from the number of values to be averaged. This reduces
the sensitivity to short-term peak load during monitoring.
■ Maximum torque – not used at present
■ Reaction delay time P1, P2 [0..1000 ms]
The system reports a limit violation as soon as the delay time for P1 or
P2 (limit torque 1 or 2) has been exceeded.