Remora - ethernet NVEM / EC300 / EC500 cnc board

No it's still the same. The first clip is in CSS mode. The signal is gradually tapering up and down when moving in 10mm moves. You can hear the spindle nearly stopping as it's tapering up or down, only when it levels out again it goes to the required speed.

The second clip is out of CSS mode and manually pressing the Jog buttons. The signal has sharp edges as it's going straight to the required speed instead of tapering up or down .

I still can't figure out why this is happening. My VFD requires a 0-10v input. I'll hook up an oscilloscope to the speed input on the VFD and see what's happening.

Hello, everybody!

About 1.5 years ago I tried going the Remora route on my NVEM V2 with the STM32F207 and a Raspberry Pi 4. After a steep learning curve I finally managed to get the motors to turn, but experienced an issue where the motors would stutter, or skip steps, for some reason. Despite some kind peoples best effort to help, I was never successful in solving the issue and my PrintNC has been out of order since then.

I finally gathered some energy and wanted to give this another go, so I bought a mini-PC, a Lenovo M93p, mainly because I feel more comfortable using a real PC rather than a RasPi, and because it feels like there is more support for it.
Anyway, I followed all the same steps as the last time to get Remora up and running, but unfortunately the result is the same, the motors turn, but stutters.

1.5 years is a long time in the world of open source firmware development, so first of all I would like to ask if the Remora-NVEM repo is still the latest one for the NVEM V2? Or has the old NVEM V2 been integrated in another repo and has seen some updates since?

My next question would be, if it turns out that I simply can't get the NVEM to work properly, what is the board to buy nowadays? Is it the EC300?

Regards,
Christian

I have been using EC300 with Remora for the last four months, and it has been great. Once I got it up and running, I didn't have any problems. You can now get an EC300 with Remora firmware on eBay.

I noticed when looking at encoderS0.position I'm getting no valves. Also no valves when looking at spindle.0.revs in halshow. Could this be causing the issue ? EncoderS0.phase-Z is getting the signal from one of the remora input pins(my encoder index) which both are blinking in halshow when triggered. Should I be seeing the spindle.0.revs displaying a valve in halshow?

normally yes, it will increase, and then during threading i think, there is a reset index command which turns it to 0 i think. during css operation im not sure.

did you end up getting the abz encoder? did you do the spindle.speed-in stuff? monitor that while your doing the css and see if it takes a dive while the speed is changing. the remora.sp0 signal looks exactly as i would expect though, with the speed tapering up or down as the diameter changes.

Yes iv A and B hooked up to the PV which is working, counting fwd and back. Iv another encoder that came with the machine stock (emco encoder) that I'm using for the Z as it's 24v and hooked straight to an input pin. Yes iv the spindle speed in , in my Hal file same as yours.

When I hook a multimeter up to the vfd 10v in, the voltage physically drops near to Zero if a lot of speed adjustments are done. So I can see now what is happening but iv no idea why the voltage drops so much. It must be something to do with how remora outputs the signal ? 

I spent the whole day going through different code with chatgpt and still nothing, it's still dipping. Should I ask this in a general new topic in the forum or is this specific to remora do you think 

cakeslob wrote:

thanks vp, that will save us a lot of work. we need to archive this shit for the repo or something

darkpheonix - that is good to hear

spyder - this is my WIP remora spindle template (no encoder edition). murphy is also using it. some might be duplicate to what you have now

#########################################################################################
# Remora Spindle hal remora_spindle.hal
#
# this hal file includes the following
# - connecting Remora outputs to LinuxCNC motion spindle.0 enable/direction
# - connecting spindle signals to LinuxCNC motion spindle.0 pins
# - converting the LinuxCNC motion spindle.0.speed-out-abs to signal with scale
# - connecting converted LinuxCNC motion spindle.0.speed-out-abs to Remora PWM
#
#########################################################################################

# conenct LinuxCNC motion spindle.0 on/enable to remora output 01
net spindle-on <= spindle.0.on => remora.output.01
# conenct LinuxCNC motion spindle.0 direction to remora output 02
net spindle-cw <= spindle.0.forward => remora.output.02

# connect spindle signals to LinuxCNC motion spindle.0
net spindle-cmd-rpm <= spindle.0.speed-out
net spindle-cmd-rps <= spindle.0.speed-out-rps
net spindle-cmd-rps-abs <= spindle.0.speed-out-rps-abs
net spindle-at-speed => spindle.0.at-speed

### Connect and configure spindle PWM/0-10v signal ###
###########################################################
# Spindle PWM 0-100 control
# converting the LinuxCNC spindle speed output
# into a useable output signal for our remora pwm component
# - for pwm the math is 100/ [MAX SPINDLE RPM] = gain
# 100/(5000rpm) = .02 , the gain is 0.02
###########################################################

# load a linuxCNC scale module,
loadrt scale names=scale_to_rpm.0,scale-rpm
addf scale-rpm servo-thread
# configure spindle rpm to pwm
# pwm 100 / max rpm = gain number
#setp scale-rpm.gain 0.02 # 100/ rpm (5000) = .02
setp scale-rpm.gain [SPINDLE_0]RPM_GAIN # 100/ rpm (5000) = .02
# connect the LinuxCNC motion spindle.0 speed-out-abs to the pwm scale
net spindle-speed-scale spindle.0.speed-out-abs => scale-rpm.in
# connect pwm scale output to remora spindle pwm SP.0
net spindle-speed-abs scale-rpm.out => remora.SP.0


# Manual toolchange

loadusr -W hal_manualtoolchange
net tool-change iocontrol.0.tool-change => hal_manualtoolchange.change
net tool-changed iocontrol.0.tool-changed <= hal_manualtoolchange.changed
net tool-number iocontrol.0.tool-prep-number => hal_manualtoolchange.number
net tool-prepare-loopback iocontrol.0.tool-prepare => iocontrol.0.tool-prepared

 

I tried this spindle config and I get the following error - ./remora-ec500.hal:79: Ini variable '[SPINDLE_0]RPM_GAIN' not found. Would you or anyone else know what might be wrong and how to fix it?

Try deleting [spindle0]

setp scale-rpm.gain .02
put that in instead

Murphy wrote:

Try deleting [spindle0]

setp scale-rpm.gain .02
put that in instead
 

 

At least that gets me to the next error - ./remora-ec500.hal:127: Pin 'remora.output.02' was already linked to signal 'spindle-cw'

line 127 is - net mist    remora.output.02     => iocontrol.0.coolant-mist

Edit: I figured out that the pin for the spindle was wrong, it should of been .00 not .02. Now I have the spindle turning on. First time I have seen the spindle run sense the day the machine shipped. No speed control and I am unsure how to fix that, but at least I am making progress. At this rate I might even see the mill actually working before fall.