forum.cncdrive.com

I understand that certain modern wireless probes have a deliberate and deterministic delay between "touch" and the signal being asserted - 5ms was mentioned in a recent presentation I saw from Renishaw. Clearly the controller needs to take account of this, by subtracting the distance moves in 5ms at the feed rate from the captured value. Longer delays may be programmed for applications that are prone to false triggering. Does UCCNC have the ability to set a delay parameter or would the user need to do this in the probe macro please?

That's why double probing is recommended (and also written in both the M31 sample macro and the probe screen). You run a fast probe first to find the target, retract a little and run a slow probe to get the exact position. If the second probe is slow enough then the latency can not take effect. (In metric mode I usually recommend 25 mm/min for the fine probe.)

Thanks, but that wasn't my question - does UCCNC have a configurable delay parameter? In another thread cncdrive stated that at least one of their controllers hardware-interrupts the processor with the probe signal and records the axis values at that instant, then decelerates to a stop. If the probe signal has a known delay between touch and edge and controller knows what it is then the true probed value can be calculated and sent to UCCNC (or the latter can do the calculation). If not then the macro has to do it.

No, there's no delay parameter. That's why I wrote how you can manage the delay.