Advanced Search

I have no idea about anything you are talking about.
I just type ethercat sdos and ethercat pdos and write the xml file we need.

We did work out the deiwu settings and is in my git
github.com/rodw-au/linuxcnc-cia402/blob/...hercat-conf.xml#L158
Note this is slave 3 in my config. That may be different for you.
Some devices, there are existing drivers in the repo I linked earlier but this one we needed to use the generic driver and define its pins. Take the time to read the docs in that repo.

Now I'm even more confused. I'm not sure if your most recent comment was a response to mine.

The ethercat xml format (esi) is a standard by beckhoff.
www.ethercat.org/en/downloads/downloads_...B2BB2686BBA963EC.htm

It would seem that the driver used for cnc linux is using a different format and that, to be frank, seems like a very odd decision.

They use strange language too, it's a "EtherCAT SubDevice Information (ESI) " that's normally used, a device description file as they are generically known similar to gsdml or iodd. A driver is really a different thing but maybe that's normal language in the cnc world. Tis stuff isn't a windows / linux issue.

I bought one from aliexpress but I suspect the vendor won't have a xml file for it now. I need one in the standard format unfortunately maybe the one created here is based off the standardised format?

I'm surprise you guys aren't using the SOEM library for you master is there a reason? Does the one you linked run in user space?

Ok i have given these commands and linuxcnc-hal widgets appeared in qtdesigner

Thank you all very much for your help. Input common wasn't connected, now it's working.

Do I understand correctly that for the velocity loop, usually only P and I coefficients with FFC are used? And for the position loop, only P is used?

thanks. Now i just need some monies to waste on this!
anyone wanna buy some used pizza crusts?


ATC placement on the v1 machine (functionally the same as my current prototype). It's barely bigger than the servo.
 

But why would 24V work just fine with the old controller? What difference does the new controller make to where we are all of the sudden skipping steps?

I believe both computers were bought and LinuxCNC installed at the same time, the ASRock was not used until we tried to set up the router. The mill has been running LinuxCNC for a long time.

Those hal commands should work as-is
as long as you know what needs to connect
to heat-on and how-hot (maybe those could be replaced
by spindle enable and spindle speed)

This is a fairly drastic solution but using a 48 volt power supply will more than double torque (but you would need to replace the drivers with a DM542 or similar). That will certainly fix any missing steps.

I don't know why these Chinese machines only use 24v. We are in the process of retrofitting a 2400mm x 1200mm plasma table with rack and pinion drives and a 24 volt power supply.  We are replacing the motors of unknown origin with quality ones, adding 5:1 planetary gearboxes and using Lam Technologies Stepper drivers with a 60 volt AC power supply. We use a Mesa 7i76e. We expect rapids to increase from 5 m/min to 25 m/min or higher.

You set up a new system with LinuxCNC 2.5?

I guess a Breakout board/parallel port/cabling issue is possible as well
 

Private messaging is disabled in this forum.

Typically this would be done with nested PID loops
The inner loop being a velocity control loop and an outer
position loop. If this is a high bandwidth mechanical system
you would likely need to have a 4 KHz or higher servo thread rate.

Yes, what is used on WIndows is not helpful. The git for the Linuxcnc driver has documentation
github.com/linuxcnc-ethercat/linuxcnc-ethercat

zmrdko wrote:

i have seen in other thread, that you are from Slovakia. Me too, PM me
 

world is small everywhere...    I can not to send the PM but I do not know why?! I have spamming mail at my profile right now... please text me anything till I will change it..