Remora - ethernet NVEM cnc board

GeramyL wrote:

Dropped my accuracy down to 0.0005mm per step about 10,000 pulses per per full rotation being 5mm.
 

I never seen your machine, but I don't believe that any amateur CNC has real accuracy better than 0.01 mm...

Haha i know right, but its more about resolution not about accuracy. If you move at 0.01 movements with a stepper motor it wont be smooth, it will be very jagged, where a servo and may i say are beautiful, would work great with lower resolution because they dont step they are constant. When you lower resolution on a stepper you get less smooth movements at least from my experience, I do have smooth stepping enabled on my drivers which are super high quality drivers with tuning and rs232 but you can only get so much out of steppers.

remora-docs.readthedocs.io/en/latest/sof...indle-control-simple

Im not seeing a config example in the nvem repo, but here is how we are doing it otherwise.

Change remora.SP.x to what ever is in your config, and adjust the gain to spindle rpm. I think it works out to 100/24000 . another user did this the other day, here is a snippet from his config




edit, honestly ive been thinking the same as tux,
im surprised remora can keep up with that many steps. I need some kind of step/freq calculator

Hey,

I flashed my NVEM v5 with github.com/scottalford75/Remora-RT1052-c...ora-rt1052-1.1.0.bin

Which JSON config I should upload and which LinuxCNC sample config I should start with to get it to work with NVMPG?

Ahhh okay, it seems my PWM settings on my VFD are backwards or something haha, when I put spindle speed at 0% I get 100% spindle speed, when i put linuxcnc at 100% spindle speed my actually spindle speed is 0% or well not 0% because I have a required minimum so i don’t damage the drive.

Need help, please.
I successfully managed to install the firmware. At first the steppers made some cracking sound (which I thought came from being the pc not ideal with a slow clocked Pentium J5005), but I used the 0.2.1 image.
After flashing the remora-rt1052-1.1.0.bin file and uploading the config, the steppers are running smooth now.

Now I have two questions:

My Novusun NVEM v5 controller only came with a v2 manual and on my controller there are no 12V connector for the limit switches, instead there are COM connectors next to the input pins. If I connect a microswitch between COM and IN4 there are no changes in the HAL Meter visible. Should I connect the microswitch between the most right 12V and IN4 ?

And my second question, I removed the unused A, B, Z axis from the config file and some MPG config entries, uploaded the config again, but they still show up in the HALshow. Is this right? Or should I just upload the full-config? Are there any performance improvements if I delete some unused pins?

Thank you.

On my v5 there is 12V pull-up on, for example, INP3 pin. You can check it with multimeter, there should be +12V between COM and INP3.

With `nvem-rt1052.txt` config uploaded with:
$ python3 remora-rt1052-basic/upload_config.py nvem-rt1052.txt

I see an action in HAL on `remora.input.06` when I connect COM and INP3 together.

Thank you so much. I measured only 6V, but after changing the input voltage of the nvem board from 12,5V to 24V it works (now I only have to get the 0-10V spindle output working)!!

Do you, by any chance, have NVMPG? Because that's the only thing I was not able to get working so far.

No, I do not own one, yet.