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this is what i went with and the cheapest is what drove this decision. Since i have never done a plasma machine before top-of-the-line stuff is is not something i want to do on a first-time build for plasma., these drives are rated for 42V so 36v is safe and should do what i need them to do. i plan on keeping the gantry very light, plasma should not need anything to rigid. my thought is 11-gauge square tube should do fine, i honestly don't think you need much more than 1 linear rail on the gantry maybe 2 on the Z but 1 there too would probably be enough.

i will be doing my planning in fusion 360 to work out a final game plan, i might try to design things so i can add a rotary later down the road if i want to get into than later. This straight torch is pretty long so a z with lots of travel is probably something i will factor into a design. Z height is something i would avoid in a milling application but with plasma it should not matter much.

Merged. thank you.

Hi everybody
Sorry, but I didn't read all the 73 pages of this topic. I start using Probe-Screen but have a little bit a problem with missing M6 command.

At the moment I have several tools with SK30 holder. Every tool has it own length in the tool table and I make manual toolchange. Now I want to add a 3d probe sensor.

I don't have a tool length sensor mounted on the bed. I only use it to measure the tools.
So I would like to keep it that way.

What would be the best way to solve this problem?

The Deiwu I/O does not output PWM,
Rtelligent has one that does.
But as Hakan says an Ethercat stepper driver would be the best solution
eg Rtelligent ECR60 but Leadshine also do one now. 

royka wrote:

Alright, I assumed you would have one since you have an rpi image builder. But likely it uses a prebuild from Debian that seems to be patched already.

Yes, I built the Pi images for Linuxcnc you find on the downloads page. I shared my repo for the builder on this thread earlier. Bear in mind the pi5 was released just after we released Linuxcnc 2.91 and at the time pi5 support was patchy in the upstream builder. I've since updated the builder and it has been tested on the Pi5 and the shortcomings are reported to be gone.

We actually build the kernel .deb from the official Raspberry pi kernel repo and wrap Debian around it and build a compressed image. The 6.12  kernel should be supported by the builder. You should give it a go. As its cross compiled, building the kernel will be quicker than  it can ever be on a Pi and the kernel as well as an optional img (which we compress) is built.

nah, go 48v if your drives can support it. its the current which matters. You could drive the motors at 72 volt with the right drivers if you wanted and still not break them,