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I am looking for some guidance on switching my plasma table from hypertherm controls with servo motors/drivers to linuxcnc.  I have retrofitted my other plasma table that uses steppers to qtplasmac/mesa hardware, however the servo wiring is beyond me.  The current hypertherm controls cuts fine, however the microedge has been spontaneously rebooting and unreliable.I have a thcad 5 and thcad 10 already on hand, after reading around, I believe a mesa 7i97t is what I need?  Either way I am unsure of the wiring that needs done.  I apologize for my incompetence and am willing to learn.  I really like the qtplasmac interface over hypertherms softwareI attached pictures of the hardware. Would it be possible to leave the pcb that the servo drivers connect to on the back panel and replace the microedge controller with some mesa hardware and the needed power supplies and linux computer?

Hi automata,

Yes you are right.

We will try to implement 3d clothoid.
If this won't succeed we revert to your method.

Something like 3 weekends later and the rotational parts move as they should. I got lucky with my material choices trying to keep things cheap. I ended up with about .005 to spare on the surfaces that mater and ended up with some mismatched surfaces just from the stock not being round. I got lucky this time. now if i can get it to seal in the right places and direct the air in the right places I'm in business the rest is downhill on this on this side. the other end is more complicated yet
 

Can you check if you have an accumulated error?
(does the spindle return to the same reference position when done)

Hi,
to my hal file: loadusr -W hal_manualtoolchangenet 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 added this line: "loadusr linuxcncrsh -n --name localhost, -p , --port 5007" at the end of my hal file, and there didn't appear any error when I ran the CNC manually the Axis Gui. Everything works. But when i tried to run in this command "telnet localhost 5007", through the Terminal I got this error:Trying ::1...
Connection failed: Conexión rehusada
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]' I am using parallel port 0x378 What is missing or is wrong?Thanks a lot.

@Fabian,

Thanks for writing me. Mabye you could help us?

The frego paper i tried to read it tonight. It brings up several idea's how clothoids where solved in the past.
And then it bring's up a closed form solution.
However i just miss the knowlegde here to understand how it's done.

This paper i would bring under attention, it uses 4 clothoids to generate a clothoid spline fillet in 3d.
The mathematics are quite well documented. And the result pictures look very promising.
clothoid paper 3d_1

Adding a shield to the step cable has not changed anything.
I will scope the step signal in the next few days...
I tried it at least 8 times today at different speeds.... it was quite intriguing that the offset diameter increased when the speed was increased, but the offset angle always remained constant.


Anyone have any other recommendations on how to fix this?

Lcvette wrote:

nice.. have you considered simply adding the probing tool number parameter to the toolchange call with an if statement? this way anytime you load or unload the probe tool it would activate a subroutine to either deploy the probe or retract it?
 

 

I made it like this now, reading the tool number, converting to float, compare with wcomp.
3D_Probe_Extend is bound to an output pin on my mesa daughter card.
 

Hello.

I have exotic servo drive from China, I tried to control it via cia402 hal, but it doesn't work, status word is always zero.
Then I tried to trigger the state machine manually via halcmd and halshow. The drive still doesn't work, it is in OP state, but the status word is always zero. I tried different configurations - but without success.

I also tried to control it via CodeSys control RTE (CiA402 ethercat) on my Windows laptop - everything works, the same settings, rxpdo, txpdo, dc.

Any ideas what the problem could be?

I attach my configuration and XML from the manufacturer:
 
 

I use debian bookworm with preempt-rt kernel and isolcpus. I tried to run servo drives from another manufacturer with same software - they work like a charm.

Thanks.

Hi all, 

This is my fist post on the forum.

I have a CNC setup running on an old PC. I wanted to have a go at it and try to go to a rapsberry pi 4B to run it. much more compact etc. 
I have ordered from byte2 bot a board to make the raspberry pi with an serial connection connecting to a CNC break out board. 

I have installed this  LinuxCNC 2.9.4  Raspberry Pi 4 OS based on Debian Bookworm  Raspberry Pi 4 Uspace compatible with Mesa Ethernet and SPI interface boards.

I have also installed  xrdp and tight vncserver

When I connect from my home computer on windows 11 I am able to find the raspberry pi via my home network but when I log in I get a pixeled image. (see attachment.)

Is there something that has had the same issue and has an idea how to get rid of it? 

Thanks in advance!