Hello
In my version of sheetcam there is a variable I can set to determine distance between probing. It is set within the post processor. I'm not at home now and can't give you the exact directions but I think it's under option, machine, post processor - pick your post and then click edit. You can set the distance between probes there in mine (I use the TNC3in1 height control). I am unsure about Proma posts but a lot of people use them so there must me a good post processor somewhere for them.
Steve