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if you're referring to my back it's as good as it is going to get. I have to be careful how much I lift
because If I do to much weight I could inadvertently start loosening the screws. For the most
part though I'm good.

Thanks for that great info on the drives, I hadn't identified the model yet.
I'm diving deeper into the user manual/electrical prints. They are pretty well done. tormach.com/support/mill/1500mx-documents

The prints confirm you are right on all counts. They are getting the I/O from the drives. The I/O board is called "Tormach Servo IO Breakout". and its connected to each drive with a cable.

And the axis drives are listed as:
"Inovance SV660N, AC Servo Drive, Ethercat, 220 Vac, 5.5 A, STO Function"

I'm likely going to add a 4th axis anyway. So either 5in 3out more will be enough for me, or I'll just buy a Beckhof module like PCW mentioned.

I'm sure I could repurpose some of those existing 25/15 I/O, I'm not going to have flood coolant, for example. But it would be nice to leave the factory stuff alone as much as I can, just for simplicity.

I also noticed the ATC option, which I was going to get, looks like it gives 2 more In and 1 more out unused. It looks like I've got plenty of I/O options.

Thanks for your response!

I can go back to a stable Debian system on this computer if needed. I have your original 2.10 on my HP, and it is working. I'm just trying to get the AMD system up with 2.10. It is not a panic situation at all.

Thank you.

 

Friends,

from what I can only assume is inconsistencies in diameter or something but 533.33 is the number.

with 533 after 20+ revolutions you can see the starting point creep earlier -- indicating its just short of the number of steps to complete a full circle.

with 534 after 20+ it goes the opposite way.

I have a few follow up questions:

- what should i have the dip switches set to? Now that we've figured out they don't do anything to effect the steps per revolution is there an optimal value for this? I dont need insane amounts of torque or rpms

- is this something i can easily fix with the encoder once i do move to LCNC and tune in the encoder error?

thanks all for sanity checking me thus far, nice to know im not 100% crazy.

forum.linuxcnc.org/18-computer/44828-rem...-cnc-board?start=380
I found something here, it's not easy to follow so many different cards and so many different topics in a discussion, it's even hard to find them!

Yes i meant the RPI required part.
I got fed up with RPI, first when i bought 3 and found out they are utterly underpowered and require huge amounts of time to get anything working on them (this was back in the RPI3B era), and got disgusted by youtubers shoveling them as the only option to run Klipper/3D printers during the pandemic when the price got to over 180$ !!! Second hand laptops are much cheaper and much more powerful, and can easily run Klipper.

Certainly possible but likely needs a hardware specific driver,
perhaps the RPI GPIO driver could be used as an example.