Tool Zeroing

[NormB]

I have looked at several posts for tool zero macros etc. tried several but with no success.  I obviously do not unerstand how htis works.  One I was really interested in was a simple copper plate of a known thicknedd two leads one to the controller and the other to the tool with a cli[ when the tool touched the copper it would auto register a prefixed dimension of the copper plate.  I tried many ways to make this work I needf help this would save me a lot of time if I can get it to work.

[Tweakie.CNC]

Hi NormB,

If you are lucky and the tool is already at GND potential then you only need the one lead, connected to the copper plate. This lead is connected to any spare input and configured within Mach as the Probe. There are numerous macro's for the auto tool zero button and you just choose which one best suits you.

If it is any help, the way I have implemented it is shown in the bottom half of this page. http://www.cooperman.talktalk.net/files/17.htm

Tweakie.

[ger21]

How do you have the plate wired? You may need a pullup resistor on the input.

[NormB]

The plate works connected to the controller as normally open when the tool touches it reacts but the macro makes it go nuts.  I never know where the tool will end up.  it will rise but sometimes an inch and sometimes 1/2 inch etc.