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  • dbtayl
  • dbtayl
18 Mar 2026 23:31
Replied by dbtayl on topic Motor timing help

Motor timing help

Category: General LinuxCNC Questions

Yup, that's noise. Your scope settings are so "zoomed in" in time and voltage you probably can't see the real signals.
  • Set your scope's Y axis (voltage) range to more like 1V/division. More if the signals are (eg) 24V.
  • Set a trigger on a rising or falling edge, with a threshold of something in the middle of your signal voltage range. Eg, if it's a 5V system, set the trigger at 3V or some such.
  • Change your X axis (time) to much longer. This depends on how fast you're moving the motor, but 25 ns is way too fast to see the signals you probably care about. Something more in the 100 us or 1 ms range probably makes much more sense.
If you do the above, you'll probably see step/direction signals, or quadrature, or something. Either way, it's very likely something LinuxCNC supports "out of the box". Engineers are lazy and generally don't invent new protocols if they don't have to
  • georgio
  • georgio
18 Mar 2026 23:28

Installing Linuxcnc on new pc Using Debian 12.13 and Linuxcnc 2.9.8 mesa 7i76eu

Category: Installing LinuxCNC

Thank you for all of your help Peter, I have finished all of my testing now the conclusion is clear.
  • rodw
  • rodw's Avatar
18 Mar 2026 22:47
Replied by rodw on topic Updating Old GladeVCP Files?

Updating Old GladeVCP Files?

Category: GladeVCP

Not able to help here but this is a continuation of the deprecation of Python 2.7 back when Debian Bullseye (v 11) was released. You need to convert your handler to Python 3. 
  • tommylight
  • tommylight's Avatar
18 Mar 2026 22:22
Replied by tommylight on topic StepperOnline A6 Servo

StepperOnline A6 Servo

Category: EtherCAT

Inside the Basic.hal file, you have trivkins called twice as noted in the error report
"trivkins: already exists"
  • Spezidrohne
  • Spezidrohne
18 Mar 2026 21:59
Replied by Spezidrohne on topic StepperOnline A6 Servo

StepperOnline A6 Servo

Category: EtherCAT

Update:
i have copied the "working" fies from page 1 into my axis.sim folder, removed the date in their names and put the Basic.hal to be called in the axis.ini file. now the axis.sim does not start and i get this error log: 
Print file information:
RUN_IN_PLACE=no
LINUXCNC_DIR=
LINUXCNC_BIN_DIR=/usr/bin
LINUXCNC_TCL_DIR=/usr/lib/tcltk/linuxcnc
LINUXCNC_SCRIPT_DIR=
LINUXCNC_RTLIB_DIR=/usr/lib/linuxcnc/modules
LINUXCNC_CONFIG_DIR=
LINUXCNC_LANG_DIR=/usr/lib/tcltk/linuxcnc/msgs
INIVAR=inivar
HALCMD=halcmd
LINUXCNC_EMCSH=/usr/bin/wish8.6
LINUXCNC - 2.9.8
Machine configuration directory is '/home/christian/linuxcnc/configs/sim.axis'
Machine configuration file is 'axis.ini'
INIFILE=/home/christian/linuxcnc/configs/sim.axis/axis.ini
VERSION=1.1
PARAMETER_FILE=sim.var
TPMOD=
HOMEMOD=
TASK=milltask
HALUI=halui
DISPLAY=axis
COORDINATES=X Y Z
KINEMATICS=trivkins
Starting LinuxCNC...
Starting LinuxCNC server program: linuxcncsvr
Loading Real Time OS, RTAPI, and HAL_LIB modules
Starting LinuxCNC IO program: io
Starting HAL User Interface program: halui
linuxcnc TPMOD=tpmod HOMEMOD=homemod EMCMOT=motmod
Found file(lib): /usr/share/linuxcnc/hallib/core_sim.hal
Found file(lib): /usr/share/linuxcnc/hallib/sim_spindle_encoder.hal
Found file(lib): /usr/share/linuxcnc/hallib/axis_manualtoolchange.hal
Found file(lib): /usr/share/linuxcnc/hallib/simulated_home.hal
Found file(lib): /usr/share/linuxcnc/hallib/check_xyz_constraints.hal
Found file(REL): ./cooling.hal
Found file(REL): ./Basic.hal
Shutting down and cleaning up LinuxCNC...
Removing HAL_LIB, RTAPI, and Real Time OS modules
Removing NML shared memory segments

Debug file information:
Note: Using POSIX realtime
trivkins: already exists
./Basic.hal:3: waitpid failed /usr/bin/rtapi_app trivkins
./Basic.hal:3: /usr/bin/rtapi_app exited without becoming ready
./Basic.hal:3: insmod for trivkins failed, returned -1
2381
Stopping realtime threads
Unloading hal components
Note: Using POSIX realtime
  • Teknic_Servo
  • Teknic_Servo's Avatar
18 Mar 2026 21:46

Axis position shift during helical boring - Fusion 360 Personal + Mesa 7i96s + C

Category: General LinuxCNC Questions

Hi maruf1777,

I’m an engineer with Teknic and I came across your thread. There are a lot of good recommendations from other users, and it looks like you’ve got some solid next steps to test. If you want direct help from Teknic, feel free to contact us at 585‑784‑7454 or www.teknic.com/contact/ and one of our engineers will be happy to assist.

Also to build on dbtayl’s quadrature note: when ClearPath is set to quadrature input, it treats each edge transition on the A and B signals as a count. So if you keep the same command resolution (counts/rev), the required signal rate on each line is actually 1/4 the pulse frequency you'd need when using step & direction. If your Mesa card supports quadrature output, you can set ClearPath’s Input Format to Quadrature in ClearPath‑MSP, which can help if you’re running into pulse‑rate limits or signal‑integrity issues.

Best regards,
Nick D. - Teknic Servo Systems Engineer
  • tommylight
  • tommylight's Avatar
18 Mar 2026 20:40
Replied by tommylight on topic Motor timing help

Motor timing help

Category: General LinuxCNC Questions

At 75 and 185mVPP, those look like noise, not a signal of any kind, although the first one is weirdly clean sinusoidal.
  • miniwini
  • miniwini's Avatar
18 Mar 2026 20:01
Replied by miniwini on topic LinuxCNC 2.98 - Ethercat - ProbeBasic

LinuxCNC 2.98 - Ethercat - ProbeBasic

Category: EtherCAT




thank you for this very helpfull hint!! it´s back online!!

the grandixximo repo did it!

cheers

miniwini

 
  • PCW
  • PCW's Avatar
18 Mar 2026 19:46

Installing Linuxcnc on new pc Using Debian 12.13 and Linuxcnc 2.9.8 mesa 7i76eu

Category: Installing LinuxCNC

OK if you have +24V on TB1 pin 5 relative to TB1 pin 8
and no red LED above TB1 when LinuxCNC is not running,
The 7I76EUs field I/O section has failed or been damaged.
  • kello711
  • kello711's Avatar
18 Mar 2026 19:39
Replied by kello711 on topic Probe Basic Errors after successfully probing

Probe Basic Errors after successfully probing

Category: QtPyVCP

Maybe send as screen shot of your roster settings and probe page settings as well as your z travel.

Attached. I think this is what you were asking for.

Also have you edited your var file and added all of the parameter numbers shown in the probe basic docs so the settings are persistent?

Yes, my ini includes a ref to the var file. Settings are persistent across executions of LinuxCNC. Or at least I think so.

github.com/kello711/linuxcnc/blob/main/c...ntnc/probe_basic.var
  • kello711
  • kello711's Avatar
18 Mar 2026 19:28
Replied by kello711 on topic Probe Basic Errors after successfully probing

Probe Basic Errors after successfully probing

Category: QtPyVCP

Where is your zero home in z

Zero is at the top of travel with -6.3 at the bottom.
  • Aciera
  • Aciera's Avatar
18 Mar 2026 19:18 - 18 Mar 2026 19:43
Replied by Aciera on topic Updating Old GladeVCP Files?

Updating Old GladeVCP Files?

Category: GladeVCP

The first thing I'd try is to load your glade file in the Glade (Version 3) editor and save it.

Also check for error output when starting your config from a terminal.
  • 0x2102
  • 0x2102's Avatar
18 Mar 2026 18:44

Umstieg von LinuxCNC + Mesa auf EtherCAT (Leadshine EL8 / Beckhoff) – Erfahrunge

Category: Deutsch

Der groesste Vorteil fuer mich bei einem EtherCAT System ist die Nutzung von Servos mit Absolut-Encoder. Maschine starten, LinuxCNC liesst die aktuelle absolute Position, "Home All" druecken, fertig (nichts verfaehrt da absolut). Selbst diesen Schritt koennte man sich mit ein paar Verbindungen in der HAL sparen und gleich bei "Machine On" bereit sein.

Falls das gewerblich genutzt werden soll dann nur Servos mit STO.
  • andrax
  • andrax's Avatar
18 Mar 2026 18:39

Umstieg von LinuxCNC + Mesa auf EtherCAT (Leadshine EL8 / Beckhoff) – Erfahrunge

Category: Deutsch

Also Empfehlung meinerseits.
Wenn A6 dann richtig!
Bestellt zu den Servos die Encodercabel mit Batteriebox, erspart euch jede menge Ärger.
Die Servos dann auf Absolutwert Multiturn umstellen und noch ein einziges mal das Homing durchführen. 
Derzeit sieht es leider so aus, dass der Ethercat hall Treiber, sowie die CIA402 Homing Komponenten noch eine große Baustelle sind.
Es gibt zwar hierzu Entwicklungen, aber keiner weiß, wann die in den Hauptzeig einfließen. Näheres zu den Problemen sind im englischen Teil zu finden.
Zum EMV:
EMV ist ein richtiges Problem, ich hatte hier zu kämpfen bevor die Ausgabe von dmesg fehlerfrei war, dennoch reagieren die Servos empfindlich auf Störungen. 
Die empfohlenen Netzfilter für jeden Servo findet ihr Hier:
Stepperonline-A6
Netzwerkkabel Cat 6 sind Pflicht, besser Industriestandart und diese mit Feritkernen entstören, keine Schlaufen legen.
Netzwerkkarte mit Intelchip benutzen. Hier einfach mal bei Beckhoff vorbeischauen, die haben eine Liste mit Zertifizierten Chips.
Andere Karten gehen auch, aber können Probleme machen. 
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