Question:
How is the touch probe residual distance processed after the touch probe signal has occurred? What would happen, if negative values were put in for the touch probe residual distance?
Answer:
The touch probe residual distance is always considered as absolute value for the calculation of the new position target; this means that negative values are considered as positive ones.
The actual processing direction of the touch probe residual distance (TP distance) depends on the positioning direction when the touch probe occurs.
This means, if the touch probe is reached in positive direction, the TP distance is also reached in positive direction (in case of negative direction the other way round).
Traversing direction positive:
(New Target) = (TP position)
+ | TP distance |
Traversing direction negative:
(New Target) = (TP position)
- | TP distance |
The description in the old manual of the 9300 EP positioning controller has not been correct. In the new manual the description is corrected.
Tip:
For applications, in which the TP distance is supposed to be processed in the opposite direction, we suggest the following solution:
- Touch probe positioning with velocity changeover and TP distance = 0, afterwards relative positioning back.
PS1:
- Touch probe positioning
- Final speed = positioning speed
- No waiting time
- Jump to PS2
PS2:
- Relative positioning in requested direction
- Waiting time is possible
