HEIDENHAIN TNC 426 CB, Technical Manual

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6 – 150 HEIDENHAIN Technical Manual TNC 426, TNC 430
6.9 Offset Adjustment
Digital axes:
An offset adjustment at the output of the current controller is automatically
compensated.
Analog axes:
An offset at the output of the current controller can be compensated in various
ways:
n
Offset adjustment by code number
n
Automatic cyclic offset adjustment
n
Offset adjustment with integral factor
The maximum permissible offset voltage in the control is 100 mV. If this
voltage is exceeded, the error message
EXCESSIVE OFFSET IN <AXIS> appears.
6.9.1 Offset Adjustment by Code Number
7
7 7
7 Activate the offset adjustment with the code number 75 368.
The TNC displays the offset values of the analog axes in the dialog line. The
values show the setting of the voltage in 0.15-mV steps.
Display value 10 means: 10 · 0.15 mV = 1.5 mV.
The displayed offset value consists of the offset values that are generated in
the motor controller and in the control.
If the values are to be automatically compensated:
7 7 7 7 Press the ENT key or the CONTINUE soft key. The control outputs a
corresponding countervoltage.
If nothing is to be changed:
7 7 7 7 Press the END soft key.
If the offset adjustment is to be switched off again:
7
7 7
7 Enter the code number 75 368 and press the NO ENT key or the CANCEL
soft key.
The offset values are saved in the control and remain safe in the event of
power interruption. After a control is exchanged, the offset adjustment must
be repeated by means of the code number.
Note
Automatic cyclic offset adjustment and offset adjustment by integral factor
must not both be active at the same time!