Search Results (Searched for: )

  • Mtndrew77
15 Aug 2026 14:40
Replied by Mtndrew77 on topic Okuma encoders and drives
Can you tell me what encoder model you were pulling the data from? I know the resolution between the different generations can vary greatly. I think the latest generation claims about 10 million PPR.

Thanks
  • muddiver
15 Aug 2026 14:10 - 16 Aug 2026 08:57
Replied by muddiver on topic Wechsel Mach3 auf Linux CNC bestehendes Handrad weiterverwendbar
deleted
  • mediocre_chloride
15 Aug 2026 13:59 - 15 Aug 2026 14:00
Replied by mediocre_chloride on topic radiusendpunkt nicht gefunden
Das sieht nach einem Programmierproblem aus. Ist der Radiusmittelpunkt Absolut oder relativ? ich sehe in deinem Programmkopf G91.1 (relativ). Wechsle dies mal auf G90.1 und versuch es nochmal.
PS: Das Programm im Anhang würde helfen
  • JThom
15 Aug 2026 13:56
Replied by JThom on topic Colchester 4000L retrofit
It has a single MPG wheel mounted on the door/control. I might re-use it, but since most of the rest of the existing controls are going away (many worn out keys), I think a detachable pendant with some buttons might be nice for setting up longer work.

More importantly for anyone interested, I think I was wrong on the encoder/commutation stuff. After further investigation, it seems ABZ encoder outputs are available from the VCU and I don't need to worry about commutation, although there is a different wrinkle that's escaping me right now.

A couple of days after I posted about this, I got commandeered to look at a similar vintage milling machine for a repair, or similar refit. A week into that, I had to move on to a more urgent broken production tool. It's been fun. I'll update the thread with my lathe progress, success or failure when I get back to it, but it could be a while.

Having been using chat-bot assistance, I'm mindful that much of it's info on the topic is scraped and recombined from these very forums, so it's important to give back real accurate information about a project's actual viability and methodology when I can.
  • mediocre_chloride
15 Aug 2026 13:41
El2521 Configuration was created by mediocre_chloride
Hi 
I used Beckhoff EL2521 recently to Build a 2 Axis Configuration. Had a bit of a Journey until i managed to configure the EL2521's correctly.
Wanted to share this here as kind of "Documentation", as it may help people having the same issue

My Config:
gitlab.com/Lolipop333/linuxcnc_ec_plasma...1cff00b5afe3ec75813/

Explanation Video:
  • skunkworks
15 Aug 2026 13:27
Replied by skunkworks on topic spindle speed pick-up using the bull gear
We used gear tooth sensors.... for rigid tapping you would need 3 - a,b and z

Jon from pico systems did the same thing...

pico-systems.com/bridge_spindle.html

Good writeup..

sam
  • mediocre_chloride
15 Aug 2026 13:27 - 15 Aug 2026 13:32
Replied by mediocre_chloride on topic LinuxCNC 2.9 / Debian 12 RT – EtherCAT Master Setup für 750W Servo gesucht
Hi
Danke für den Thread.
Mit A6 Drives hatte ich auch das Problem, dass die Slave manchmal nicht richtig startet, ein restart des Pi's hat das gelöst. Später habe ich eine bessere Lösung gefunden: Seite 241 im Manual, Parameter C13.05: EtherCAT synchronization mode setting.

Warning: Spoiler!


Ich gehe davon aus das der Jitter vom Hostcontroller mehr als ein uS ist (gemessen auf rpi5 wurde um die 6000ns jitter auf dem servo thread). Deshalb habe ich diesen Parameter auf 2 gesetzt. jetzt starten Sie alle und brauchen auch nicht mehr ewigs. nur wenn die Drives laufen, linuxcnc geschlossen wird und wieder geöffnet habe ich einen "Ethercat synchro loss error" aber kurzes Power-cyclen über den Notaus dann gehts wieder
  • tuxcnc
15 Aug 2026 13:07
Replied by tuxcnc on topic run Linuxcnc on xenomai with EVL(the realtime core)

Code:
[url]https://github.com/hdiethelm/xenomai4-linuxcnc[/url]
There are many errors in scripts.
At last I compilled kernel, that not boot up...
For me wasted time. 
  • unicorn
15 Aug 2026 12:02
can't issue MDI command when not homed was created by unicorn
position: relative actual
new here, I use live system, I got that error when I want to run some G codes. How to configure?
  • karlhe
15 Aug 2026 09:58 - 15 Aug 2026 16:15
radiusendpunkt nicht gefunden was created by karlhe
Hallo.
programm wird nicht eingelesen, radiusendpunkt wird nicht gefunden.
Programm erzeugt mit fusion360.
fehlermeldung im anhang..

karlhe 
  • dm17ry
15 Aug 2026 06:41
Replied by dm17ry on topic Okuma encoders and drives
i've got a few communication logs from a logic analyzer and had a quick look at it. was able to decode it: 10 Mbit/s, NRZ(L), 4b6b, LSB first:
..1.11 0
..11.1 1
..111. 2
.1..11 3
.1.11. 4
.11..1 5
.11.1. 6
.111.. 7
1...11 8
1..1.1 9
1..11. a
1.1..1 b
1.11.. c
11...1 d
11..1. e
11.1.. f

but haven't advanced much beyond looking at the data.. don't have the hardware. packets look like this:
Code:
ff a1 .. aa 57 66  01 74 .. .. 02 .. .. .. 02 .. .. .. 02 .. .. .. 02 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 45 39  01 50 .. 60 e8 74 01 .. .. .. .. 02 bf 04 .. .. .. .. .. .. .. .. .. .. .. .. .. 02 bf 03 .. .. .. .. 83 ca  01 0c .. e3 08 34 02 .. .. .. .. f7 0b 3f .. .. .. .. .. .. .. .. .. .. .. .. .. f7 0b 2f 80 .. .. .. b3 be  01 04 .. e3 08 34 02 .. .. .. 01 73 95 d5 .. .. .. .. .. .. .. .. .. .. .. .. 01 73 95 b6 80 .. .. .. cd e7  01 14 04 e0 08 28 .. 01 .. .. .. 01 bf 6c .. .. .. .. .. .. .. .. .. .. .. .. ff ff 69 fe .. .. .. .. 38 d6  .. 74 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. bb 18  .. 50 01 02 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. d5 a8  .. 0c 01 02 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 01 .. 84 08 .. .. .. .. .. .. .. .. 23 e5  .. 04 01 02 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 01 .. 84 08 .. .. .. .. .. .. .. .. 19 f6  .. 14 01 02 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 98 38  ff a1 .. ab de 77  01 74 .. .. 02 .. .. .. 02 .. .. .. 02 .. .. .. 02 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 45 39  01 50 .. 60 e8 74 01 .. .. .. .. 02 bf 04 .. .. .. .. .. .. .. .. .. .. .. .. .. 02 bf 03 .. .. .. .. 83 ca  01 0c .. e3 08 34 02 .. .. .. .. f7 0b 3f .. .. .. .. .. .. .. .. .. .. .. .. .. f7 0b 2f 80 .. .. .. b3 be  01 04 .. e3 08 34 02 .. .. .. 01 73 95 d5 .. .. .. .. .. .. .. .. .. .. .. .. 01 73 95 b6 80 .. .. .. cd e7  01 14 04 e0 08 28 .. 01 .. .. .. 01 bf 6c .. .. .. .. .. .. .. .. .. .. .. .. ff ff 69 fe .. .. .. .. 38 d6  .. 74 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. bb 18  .. 50 01 03 .. .. .. .. .. .. .. .. .. .. .. .. .. .. 01 .. 44 04 17 b3 33 04 .. .. .. .. .. .. .. .. df 18  .. 0c 01 03 .. .. 01 .. 86 1b 03 f3 e4 58 4d .. ff ff 01 .. 44 15 .. .. .. .. .. .. .. .. .. .. .. .. b5 07  .. 04 01 03 .. .. 01 .. 86 1b 03 f6 ac f1 72 .. ff ff 01 .. 44 15 .. .. .. .. .. .. .. .. .. .. .. .. f6 9b  .. 14 01 03 .. .. .. .. .. .. .. .. .. .. .. .. .. .. 01 .. 44 06 .. .. .. .. 01 .. 44 15 .. .. .. .. 52 df  ff a1 .. ac 61 03  01 74 .. .. 02 .. .. .. 02 .. .. .. 02 .. .. .. 02 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 45 39  01 50 .. 60 e8 74 01 .. .. .. .. 02 bf 04 .. .. .. .. .. .. .. .. .. .. .. .. .. 02 bf 03 .. .. .. .. 83 ca  01 0c .. e3 08 34 02 .. .. .. .. f7 0b 3f .. .. .. .. .. .. .. .. .. .. .. .. .. f7 0b 2f 80 .. .. .. b3 be  01 04 .. e3 08 34 02 .. .. .. 01 73 95 d5 .. .. .. .. .. .. .. .. .. .. .. .. 01 73 95 b6 80 .. .. .. cd e7  01 14 04 e0 08 28 .. 01 .. .. .. 01 bf 6c .. .. .. .. .. .. .. .. .. .. .. .. ff ff 69 fe .. .. .. .. 38 d6  .. 74 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. bb 18  .. 50 01 04 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 4f 26  .. 0c 01 04 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 4c 83  .. 04 01 04 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 76 90  .. 14 01 04 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 02 b6 
 
  • viewsat
15 Aug 2026 02:41
Replied by viewsat on topic LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

If this is a drive level issue, note that a 26C31 does not swing to 5Vand its output level is about 2 diode drops below 5V (3.6V) with a 5 mA load.I have experience using some MESA control cards and connecting drivers, so I shouldn't have any technical difficulties connecting motor drivers.  
I have experience using some MESA control cards and connecting drivers, so I shouldn't have any technical difficulties connecting motor drivers.
 
 
  • viewsat
15 Aug 2026 02:23 - 18 Aug 2026 01:48
Replied by viewsat on topic LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)
Meister, if you were in Taiwan, I would definitely buy one for you. This Riocore ICEBreaker V1.0e circuit board should be a 2026 product; I bought it on Taobao in China in June 2026. At the time, I asked the China seller about a DM542 zero-point positioning error, and the China seller tested it and got the same result. He recommended I discuss it on the Linux CNC forum.  
  • viewsat
15 Aug 2026 02:06
Replied by viewsat on topic LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

If this is a drive level issue, note that a 26C31 does not swing to 5V
and its output level is about 2 diode drops below 5V (3.6V) with a 5 mA load.
I connected the motor driver using +5V and A-.
 
  • PCW
14 Aug 2026 23:05
Replied by PCW on topic Frage zu 7I96?
All Mesa Ethernet cards support Auto–MDI-X so it should not matter.

That said, all testing is done with straight through cables.
 
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