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Ahhh I see now, thanks for that. Haven't really looked at the ethernet code (working out the ssreial code for the 7i90 was a journey in itself, but the ethernet code would mean also coming familiar with the etherent chip), for the price of trying to implement that at home it doesn't make sense.

I really I didn't swap from an electronics trade to carpentry when I was a teenager......but being outside and using my hands was a greater calling.

Linuxcnc is miles ahead of what is running 3D printers.

I've been running my 3 axis mill for years with no limit, homing switches or position feedback, the parts come out fine.

Without seeing the actual error it's hard to tell. I'd just boot into a live session and use fdisk to remove the existing partitions and try the installer again.

If you are unsure about anything, and I'm going to be that guy, the documentation is there, full of information. The devs spend time writing them, so give them a read, even after all these years I still read them.

it does work. i was just about to do it until you told me that thanks. are there any drawbacks to doing it anyway?

777funk wrote:

Would I be able to adapt the existing motors to new driver boards and run LinuxCNC?

I do that, often, if the drives and motors are in good working condition.
Still, to know exactly we would need much more info about the drives, or pictures and videos of ... everything.

I am curious how practical it would be to re-use much of an existing CNC Router. The problem is that it used software that seems unobtainable.

I'm assuming this means that the existing motor control will be trashed. Maybe I can use the power supply.

Would I be able to adapt the existing motors to new driver boards and run LinuxCNC?

I just hate throwing out good components.

Coming along.
Anyone ever have custom way covers made?

jg00163206 wrote:

what isolcpus settings do i need for an 8 core ryzen machine?

I use Ryzen 7 3700X CPU, never had to do isolcpu, it just works. Same on Ryzen 5 3600.

@Hi,

Tonight i went to the production machine with a hard-drive for testing hal-core.
After figuring out how to setup hal parport and run posix realtime etc for a few hours,
i managed to run the machine on hal-core.

Most of you know halcore uses no python and is very compact coded.
It run's posix realtime, so i am happy for today.



github up to date

i have not installed everything yet. i will get to that and let you know how the latency is after running it for a day or so. thank both of you for all your help.

Absolutely brilliant. thats the ticket right there. even without isolcups. its been running for several hours now and i haven't gotten the dreaded error finishing read error.

Hi Arciera,

I understand now.

Then my interpolation proposal seems correct :

G1 X1 Y2 Z3 A10 C20
G1 X11 Y2 Z3 A20 C40

Here the xyz moves 10 mm = Line lenght xyz.
Lets assume the spline or fillet lenght from "Q0 to Q1" -> "A10 C20 to A20 C40" = 40mm

Then the interpolation for xyz at 5mm = t0.5 (for interpolation i use time 0 to 1 for a segment)
For Q0 to Q1 is t0.5*40mm = 20mm on the spline or fillet path.

Then we can calculate new vector for A & C. This vector then has a A and a C value for radians.


This whole circus can be done offline in opencascade cad.
So just like you proposed, we do the

1. Run the clothoid fillets algo based on G64 P & Q input values. In one gcode file different fillet sizes can be given.
2. Run a tool orientation algo for a & b axis. I think using A & B is simplest. This then solves smoothing for A & B axis toolpath.
3. Run a check if A & C orientation's can be made in the xyz move time, otherwise xyz velocity must be lowered down.

Did we miss something? Or is it ready to be coded?
 

Yes, the deal is this. I found a guy with a "new" in the box 6040 with 4th axis lathe attachment for $400US, bought a desktop PC to drive it for $40 and the StarTech LPT board for $20.

This wasn't my first choice, it was just an opportunity that presented itself and I thought I'd try out a router because I was thinking of building a PrintNC. A coworker recommended LinuxCNC. I keep wondering why people aren't just running these things off a 3D printer board running Klipper or a slightly modified Klipper... seems like a better option overall than these parallel port controllers.

Obviously everything is a bit questionable, the router is probably underpowered, there are no endstops or position feedback. I can imagine skipping a step really screw you up. But for $500? Meh...

Now if only I could figure out how I screwed up my install and why when I try to reinstall off the USB key it keeps complaining there's an error while trying to create the main ext4 partition.

Thanks for the feedback on the schematic, that was my read as well, I just was unsure what the controls were called on LinuxCNC/stepconf

xylos wrote:

Hello Herr Columbo,

I am fishing in the same "trüben Teich".
Just started with the liniuxcnc thing ... my last project was a retrofit of an EMCO 3 axis router runing at MACH4.
Now I want retofit an old TOS with 5 Axis and LINUXCNC....
My equipment so far is a Beckhoff EK1100 and EL6751 (SLAVE), Dell Optiplex i7 SFF and some DELTA Servos (B3M).
The Servo motors are with CANopen so thats why the EL6751 should translate to EtherCAT - right?
Right now I am following

tu get further...
Maybe you could give me some advice to get out of the struggle?
Thanks a lot in advance!
Jürgen
Could you share

I have similar setup, except I have b3 ethercat servos. But I have el6751, since I wanted to use CANOpen vfd. It is possible quite easy to make it work in Twincat. You just make sure you have CANOpen wiring right - you need 120 Ohm resistors on both ends.

isolcpus=7

Note that if you have ~10 ms latency this is not likely to be fixed by isolcpus

Did you install the Realtek DKMS driver?

If you did, what are the current results of the ping test?

Homing and machine limits are setup in the .ini file:

linuxcnc.org/docs/html/config/ini-homing.html

linuxcnc.org/docs/html/config/ini-config.html

(for machine limits see the "AXIS" section)