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7i84 has two separate V-Field power supply inputs, so it should be easy to have one set at 24V and the other at 5V, granted everything has the same ground/0V.
Not sure that affects the inputs, but it does outputs as far as i can recall i have one such setup i did many years ago, so a bit fuzzy on details.
Either way, the 4 inputs should work as is with 5V when set to MPG mode, again if i recall correctly.

I ran a couple of tests this morning to see if I could figure out why the velocity started working OK. These two scope captures are both at 200 RPM, running the same threading program. It shows me that 10 teeth is not adequate for some operations, and that I should modify the spindle with a new gear with more teeth. I'm thinking I'll do 180 teeth/rev. It'll take me a while to make the modifications.

I don't expect this to fix the original problem of threads not aligning at different speeds, but it should fix the slightly varying thread pitch..

HAL using: net spindle-position encoder.0.position => spindle.0.revs



HAL using: net spindle-position encoder.0.position-interpolated => spindle.0.revs



 

The scale is odd because you have the .00035 scale factor (so the full scale value (to get PWM=1) is 2857 )

Do you need the scale component? Eliminating it and setting the output scale to 24000 would certainly
simplify debugging.

With the existing scaling, setting the output scale (and max output) to 8.4 should be about right:

MAX_OUTPUT = 8.4
OUTPUT_SCALE = 8.4
OUTPUT_MIN_LIMIT = 1.75
OUTPUT_MAX_LIMIT = 8.4

But why would you do that?

MAX_OUTPUT = 24000.0
OUTPUT_SCALE = 24000
OUTPUT_MIN_LIMIT = 5000
OUTPUT_MAX_LIMIT = 24000

and no scale component is 100% easier to understand


 

Thank you cornholio.

I'm looking to cut wood for building boats.

If I run into issues doing the above well, I earned a living doing Unix driver and kernel work a while ago; I would like to contribute now if I could. I have experience with a number of device driver debugging and kernel development techniques.

Let me get some hardware and software in. Again, if there is a certain feature that doesn't work that should work, let me know.

Thanks,
Tom Alborough

No, the host Ethernet address should be say 10.10.10.100

 

This is a dedicated PC for LinuxCNC for my lathe. It has built in WiFi that connects to our home network. The Ethernet port is dedicated to the MESA card. I don't plan to connect with anything else via that Ethernet port, just the Mesa card.

I have my config here for ec500 with nvmpg: github.com/zelo/linuxcnc-remora-ec500-rt1052-cfg

- For now basic spindle controll works
- Stepper drivers (DM556T) using DMA stepgen.
- NVMPG - signal generator, multiplier button, and axis selection

I have still issues with following joint errors, but thats with faster movement or direction change. I guess when i jog too fast with the wheel it cant keep up.
EDIT: fixed following joint errors by setting lower max velocity values