Corrected from:
- i700 servo inverter (encoder variant) V01.06.03.9953
Response of the new version:
With the i700 encoder variant, the current speed at the time of the TP edge has virtually no influence on the detected TP position.
The internal dead time has now been compensated for.
What happens?The detected TP position deviates in proportion to the speed from the actual mechanical position.
This is due to an internal deadtime of the actual position detection of 132 µs effective with the i700 encoder variant. The deadtime leads to an offset of the detected TP positions towards earlier positions (overcompensation).
See also article doc ID: 201400148 with information on a similar issue concerning the resolver variant.
When does the problem occur?
The problem occurs with the i700 encoder variant when using the touch probe function.
Which products are affected?
- i700 servo inverter (encoder variant) ≤ V01.05.06.9665
Short-term measures/recommendations:
None.
The described 'overcompensation' cannot be compensated via the TP deadtime compensation setting.
Only when using a TP sensor with an actual delay time equal to the overcompensation time, compensation would be achieved. In this case, the dead time compensation would have to be set to the delay time of the TP sensor less 132 µs.
Evaluation:
Depending on the requirements of the application and the accuracy required, the resolver variant can be used, if necessary.
