Question:
Which function do the codes C0430/x touch probe delay have during touch probe processing?
Answer:
The codes C0430/1....C0430/4 serve for entering a fixed deceleration time, dependent on the used sensor, for the touch probe inputs with the connected sensors.
For each of the touch probe inputs E1...E4 for the position set value an individual deceleration time can be set. It contains all deceleration times from the first occurrence of the event to the actual registration in the positioning controller.
From the deceleration time C0430 and the current speed in the controller when the touch probe (MCTRL-NACT) occurs, a correction of the detected touch probe position is automatically calculated (s = v x t) and considered. Consequently, influences of the speed on the detected touch probe position are eliminated as far as possible.
Tip:
Practically the default values in C0430 are to be modified only in case of especially high demands. If there are no data for the deceleration times of the sensor including cable, it will be possible to detect the setting empirically:
- Detection of the touch probe position in case of different speeds
- For this purpose execute touch probe positioning by the program sets or touch probe storage in POS-TP with manual positioning.
- The stored touch probe position is displayed in C1380/101...104 (VTPOS-101...104).
- In case of different speeds the detected touch probe positioning must remain as constant as possible.
- If with increasing speed the touch probe position becomes closer with regard to the driving direction, there will be overcompensation --> Reduce touch probe deceleration in C0430/x.
- Opposite: If with increasing speed the touch probe position becomes more far with regard to the driving direction, there will be undercompensation --> Increase touch probe deceleration in C0430/x.
The touch probe input E5 for the master frequency input X9 has a separate code C0429 for compensating the speed-dependent offset.
