home z before cutting each detail

You only need to home an axis once.

Is your plasma equipped with a floating torch with a probe input?

John

dzarek wrote:

I'm looking for how to do homez during program execution, befor cutting each detail in my plasma

You want to home to the limit switch? I am not sure how to do that, though it might be possible using a custom M-code something likeAlternatively, if that has undesired side-effects, or doesn't work (I don't think you can home in "auto" mode) then you might be able to use a Probe command to search for the home switch. I don't think that you will be able to use a shared limit/home switch for this.

What are you trying to achieve? It might be that there is a better way to get the same effect.

To be honest, if you need to re-home more than once a day, something is wrong.

dzarek wrote:

thin sheet metal bends when cutting, so I would like to reset the axle before any detail
I want to connect the SW home switch so that it worked when the torch touches the material

I think what you need to do is probe, not home.
You could then use G10 to set the Z height on the basis of the probe result.

Better still would be an automatic torch height control, lots of people have that, including JT.

dzarek wrote:

thin sheet metal bends when cutting, so I would like to reset the axle before any detail
I want to connect the SW home switch so that it worked when the torch touches the material

Connect a switch to motion probe input and use a probe motion as Andy suggested.

John

After the touchoff I use G92 to set the Z position of my Torch.

www.linuxcnc.org/docview/html/gcode_main...ub:G92,-G92.1,-G92.2,

After the cutting is done I turn off the offset with G92.1

John

Not without disconnecting it from the probe input in HAL. If you trip the probe input while not probing you get an error. You can however share the limit switch and home switch.

John