Remora - ethernet NVEM / EC300 / EC500 cnc board

Any idea about the pin out for spindle 0-10v output? PWM I noticed in your config/other pinouts but voltage based seems to be missing.

Thanks again
Alessandro

I dont have the hardware for the rt1052, but most units arent directly controlling an analog voltage, but rather sending a PWM to an opamp which makes 0-10v. When this is the case, the PWM signal is out of 100, so PWM 100 = 10v = max spindle speed. From the configs Ive seen for the RT1052 I will assume its the same, but I cannot find an example that says otherwise.

Can confirm this portion actually controlled voltage up to 10v on NVEMs (MX1052) output

net spindle-cw remora.output.09
loadrt pwmgen output_type=1
loadrt scale count=1
loadrt lowpass count=1
loadrt abs count=1
addf scale.0 servo-thread
addf lowpass.0 servo-thread
addf abs.0 servo-thread
setp scale.0.gain 0.00416666667
net spindle-cmd-rpm spindle.0.speed-out => scale.0.in
net spindle-cmd-rpm-abs scale.0.out => abs.0.in
net spindle-speed-DAC abs.0.out => remora.SP.0
net spindle-cw <= spindle.0.forward

 

Hello

I have an NVEM v5. The stlink is to be delivered tomorrow. I think after everything I've read here, I'll be able to flash the firmware. I am currently building a small lathe into CNC. The spindle drive becomes an AC servo. I still have to see that I get it connected with step/dir, should be feasible. Then the machine gets another MPG, no problem either. But I still have an encoder only with a/b without index. Do I have any connections left for this? Does thread cutting work with it?

Encoder:
de.aliexpress.com/item/1005006363767037....gatewayAdapt=glo2deu

Servo:
de.aliexpress.com/item/1005006659782702....gatewayAdapt=glo2deu
 

Hey Scott, sorry to bother you with this, but can you explain this a bit more? Im wondering how we can just do a math to figure it out. Ive been bruteforcing pid stuff for a few days but i cant get my overshoot down to less than 5 steps, but this question comes up on discord a bunch also.

using a 1mm distance for the example to make it easier(?)

ff1 * cmd_d + error * pgain = velcmd

ff1 = number in ini file
cmd_d = old pos - new data? this is the D ?
error = ?
pgain = ini number

edit, holy shit it my issue was a typo this whole time.

my issue is typo related, but the question still stands, is there a math way to figure it out?

Hi Cakeslob,

The stepgen "PID" was adopted from the PID component. There is some auto tuning code in there but I've not looked closely at it.

github.com/LinuxCNC/linuxcnc/blob/master...hal/components/pid.c