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  • Alexf2a
  • Alexf2a
19 Oct 2026 08:49
Replied by Alexf2a on topic HAL for open-loop encoder homing

HAL for open-loop encoder homing

Category: HAL

Thanks for the help!
Actually, ChatGPT helped me find an error in the INI file for my closed-loop system (which I attached earlier).
There is a line for initial settings: `RS274NGC_STARTUP_CODE = G21 G40 G90 G94 G97 G64 P0.025`. By adjusting the `P` value within the `G64` command, you can fine-tune the surface quality. I achieved the best surface quality with `P0.005`. I haven’t tried your firmware, as I’m currently satisfied with the surface quality I’m getting. Thanks again for your help!
  • tietouwa
  • tietouwa's Avatar
19 Oct 2026 06:44
Replied by tietouwa on topic J1900 L2 sibling: pin Qt HMI to CPUs 0-1, keep the 1 ms EtherCAT thread on CPU3

J1900 L2 sibling: pin Qt HMI to CPUs 0-1, keep the 1 ms EtherCAT thread on CPU3

Category: EtherCAT

Follow-up: isolated CPU2 as well.

HMI still on CPUs 0-1. EtherCAT thread still on CPU3, SCHED_FIFO 80.
isolcpus=managed_irq,domain,2,3 and irqaffinity=0-1, so the i915 IRQ
is off the L2 sibling. ec_r8169 is polled from that thread, no NIC IRQ.

These runs are 2 kHz (0.5 ms), not the 1 ms set above.
Same measurement: wake-to-wake minus the period, full capture,
absolute jitter, nearest-rank.

CPU3 isolated only, just before (10 runs, 124447 samples):
P95/P99/P99.9 = 4/5/7 us, max 15 us.

CPU2 isolated too (20 runs, 241941 samples):
P50/P95/P99/P99.9 = 0/1/1/2 us, signed -11/+12 us.
Every run has P99 = 1 us. |j| >= 10 us is 11 samples, |j| >= 20 us is 0.
Lost frames = 0, no missed cycles.
  • Holzwurm56
  • Holzwurm56
19 Oct 2026 06:29
LCNC and Stepspeed? was created by Holzwurm56

LCNC and Stepspeed?

Category: General LinuxCNC Questions

Hello,
When using a parallel port, entering the jitter value in Stepconf results in the calculation of the maximum step rate. Does this figure—for example, 33333 Hz—apply to each axis individually, or to all axes combined?
Best regards,
Hans
  • Screph
  • Screph
19 Oct 2026 03:07
Camera-based workpiece alignment and AI-assisted toolpaths: Screph demos was created by Screph

Camera-based workpiece alignment and AI-assisted toolpaths: Screph demos

Category: Show Your Stuff

Hi, I'm Sergei, the developer of Screph (screph.com/), a visual environment for building image-processing workflows. I'm exploring how it can help with irregular stock and repeated CNC setup.

I have two complementary English demonstrations:
1. Camera-based workpiece positioning and transformation of existing toolpaths, including clamps and excluded regions:

2. An AI-assisted design based on a wood photograph, accounting for knots, followed by alignment of the prepared paths to the board on a simulated table:


The first example uses configurable image-processing masks to distinguish stock, table, clamps and excluded regions. The second explores how the design itself could respond to features of an individual workpiece. These are separate stages: generating the design and estimating the pose for coordinate transformation. The operator should inspect the intermediate results and transformed paths before accepting a job.

These are software demonstrations and simulations. I don't own a CNC machine, and this is not a claim of a validated LinuxCNC integration or measured machining accuracy. Physical calibration, stock height, fixture clearance and controller handoff still need to be verified on the actual setup.

I'm looking for a small practical case with a machine owner, not necessarily wood, and can help with a limited test implementation at no charge. What would be useful in your workflow, and what checks would you require before accepting camera-derived positioning?
  • tuxcnc
  • tuxcnc
18 Oct 2026 20:01
Replied by tuxcnc on topic lcec_conf error (newest lcnc 2.10 and debian 13)

lcec_conf error (newest lcnc 2.10 and debian 13)

Category: EtherCAT

The machine appears to be working, xyzab-tdr-kins kinematics as well.

I came up with the idea to look for the hal_pin_u32_newf string in my LinuxCNC sources.
And bingo!
The latest ones don't have this string in any files (except old translations files), but I found it in sources with file dates between July 14 and September 26, 2026.
I installed LinuxCNC compiled from those sources and everything works as it should, although there is still a lot of work ahead of me.

From the above, the following conclusions should be drawn:
1. If LinuxCNC developers don't come to their senses, everything will soon stop working...
2.Never delete old files, even if newer works.
3. If someone works with 2.10.0~pre1, don't try to switch to pre2, because it will hurt.

I can share the deb packages I have 2.10.0~pre1 compiled on September 26, 2026 (so I guess the latest pre1), but not here due to size. I could send it to some server, but I have no idea which one.
  • tuxcnc
  • tuxcnc
18 Oct 2026 19:12
lcec_conf error (newest lcnc 2.10 and debian 13) was created by tuxcnc

lcec_conf error (newest lcnc 2.10 and debian 13)

Category: EtherCAT

Some time ago I configured and launched a machine with ethercat drives.
Everything was working fine and would probably still work, but I had to update LinuxCNC.
I simply configure the machine with xyzab-tdr-kins kinematics.
I reached the point when the machine was correctly based, but then it turned out that LinuxCNC compiled a few months ago did not support the G12.1 and G13.1 codes, which are absolutely necessary.
So I compiled 2.10 from the latest sources downloaded from Github today.
After installing the new LinuxCNC, the machine cannot be started.
lcec_conf: symbol lookup error: lcec_conf: undefined symbol: hal_pin_u32_newf
I have tried various methods and I have the impression that it cannot be a problem with the configuration or the xml file, because even calling lcec_conf in the terminal gives the same error.
# halcmd loadusr -W lcec_conf test.xml
lcec_conf: symbol lookup error: lcec_conf: undefined symbol: hal_pin_u32_newf

# lcec_conf
lcec_conf: symbol lookup error: lcec_conf: undefined symbol: hal_pin_u32_newf
I upgraded linuxcnc-ethercat ethercat-master libethercat-dev. Nothing helped.
I have not tried compiling lcec from sources, because there is no compilation environment on the computer controlling the machine, and the laptop on which I am compiling does not have a network card.

I've run out of ideas what this could be about and how to deal with it...
  • Hermle_Gerald
  • Hermle_Gerald
18 Oct 2026 19:12
Replied by Hermle_Gerald on topic Hermle auswahl Mesa Karten

Hermle auswahl Mesa Karten

Category: Deutsch

Praktisch müsste eine 7i97t für analoge Ansteuerung, Encoder für Servo, Glasmaßstab mit TTL Ausgang ausreichend sein. 
Die Karte hat praktisch alles was ich benötigen würde. Eventuell 0/1 Ein/Ausgänge sind zu wenig. 
Liege ich jetzt falsch? Oder gibt es einen Haken an dem ganzen?
Ich möchte ehest möglich bestellen. Hardware seitig bin ich fertig. Der Maschine fehlt nur mehr die Steuerung. 
Danke für eure Hilfe 
 
  • yaska
  • yaska
18 Oct 2026 18:39
Replied by yaska on topic Z-axis doesn’t move

Z-axis doesn’t move

Category: Flex GUI

You probably didn't read the whole thread—this is what it's all about

I’ve had problems with my lathe after running ‘reference’ in Flex GUI.
When both axes are  homed, I can jog the X-axis without any problems.
But the Z-axis doesn’t move. If I run ‘unhome’ on the X or Z, I can jog the Z-axis.
I switched to Probe Basic and it works as intended with the same INI file
no problems with jogging once the axes are  homed.
I checked with HalShow, and the difference between Flex GUI and PB was that the telop
function worked on both axes in PB but only on the X-axis in Flex GUI.
In Flex GUI, the X-axis is 0 and the Z-axis is 1. When the axes are not at home, jogging works normally. Where should I look for the fault?

On a lathe, the Z-axis is No. 2, and on a mill, it’s No. 3. I think that’s where the problem comes from—previously, I had to have two Z- and two Z+ buttons; on one pair, I used jog_1_pb,
and on the other, I used jog_2_pb, which I used when the axes were homed, and it worked. When the axes weren’t homed, I had to use jog_pb_1 to move the axis. 
So why does it work normally in Probe Basic but not in Flex GUI?

As I mentioned earlier, in FlexGui, the Z-axis = 2 on a milling machine, and on the lathe, Z = 1. If I change Z to Y in the ini file to the following:
KINEMATICS = trivkins coordinates=xy
COORDINATES = X Y
[AXIS_Y]
Then I can jog the Z-axis after homing, just as it’s supposed to work,
but of course the lathe won’t run because it requires XZ.
So now I hope you’ll make the necessary changes so it works correctly.
 
  • yaska
  • yaska
18 Oct 2026 18:32
Replied by yaska on topic Z-axis doesn’t move

Z-axis doesn’t move

Category: Flex GUI

 Here are the files again

File Attachment:

File Name: weiler_cnc...18-3.ini
File Size:5 KB

File Attachment:

File Name: main_2026-10-18-3.hal
File Size:12 KB

 
  • MaHa
  • MaHa
18 Oct 2026 17:33
Replied by MaHa on topic Z-axis doesn’t move

Z-axis doesn’t move

Category: Flex GUI

If you have copied flex examples, here is a lathe starter

linuxcnc/configs/flex_examples/starters/Lathe/

There is:

[KINS]
JOINTS = 2
KINEMATICS = trivkins coordinates=XZ

[TRAJ]
COORDINATES =  X Z

[AXIS_X]
[JOINT_0]

[AXIS_Z]
[JOINT_1]

and use qpushbuttons  jog_plus_pb_0, jog_minus_pb_0, jog_plus_pb_1, jog_minus_pb_1

 
  • dirkx
  • dirkx
18 Oct 2026 17:13 - 18 Oct 2026 17:15
carousel - persisting the last state & homing - what is best practice? was created by dirkx

carousel - persisting the last state & homing - what is best practice?

Category: General LinuxCNC Questions

I've got a Deckel/Maho DMC70V here with a 30 slot carousel for its tools; its Dialog112/MELDAS600 brain has been replaced by Ethercat & LinuxCNC.

I've automated part of this with the carousel(9) real time component; and this works well overall & is quite reliable Actual config at the end of the message. Now I am struggling with two things:
  1. How does one trigger this cleanly when normal homing completes (the spindle needs to be in the home position for the carousel/arm to safely home) -- and then ideally so that if the carousel homing does not come complete/come-on - the machine is not declared fully homed; just like it would for an axis ?
  2. On startup - if the tool changer is in a low slot - it will insist on doing  a full rotation with increasing numbers; thus making a full circle; even though it could just go back one. What is the right way to persist the last position on closing linuxcnc(1) ? So that it can use this to home a lot more efficiently ?

    Thanks !

    Dw.

    # Deckel-Maho DMC70V toolchanger carousel, 30 slots, can be rotated in both
# directions; with a brake sensor on the motor that controls the wheel and
# a pocket sensor that confirms it stopped at the right spot. General control
# is to power on the motor in either direction until you see the brake sensor
# coming up; then stop the motor and check that the pocket sensor confirms
# a stop in the right place. If not -that is usually caused by a tool or arm
# with something still in it & needs manual intervention.
#
# S202 is the slot signal & S201 is the brake now; stop motor power on rise and
# then wait for S201 to go high.
#
net carousel-index-sensor S200-input => carousel.0.sense-0 atc.led-carousel-index
net carousel-pocket-sensor S201-input => carousel.0.sense-1 atc.led-carousel-brake

net carousel-enable atc.button-carousel => carousel.0.enable <=> Magazine-output
net carousel-active atc.led-carousel <= carousel.0.active

# S202 will rise a bit later - to confirm correct position
# and needs to be combined with the counter ready
#
net confirm-tool-in-pos S202-input => iocontrol.0.tool-changed atc.led-carousel-pocket
net carousel-pocket-num iocontrol.0.tool-prep-number => carousel.0.pocket-number

# Link motor direction outputs to your stepgen or VFD/relay drives
net carousel-motor-fwd carousel.0.motor-fwd => Forward-output
net carousel-motor-rev carousel.0.motor-rev => Backwards-output
net carousel-current-pos carousel.0.current-position

# Allow the jog buttons to work; propably need to be
# tied to the interlock of MCall that then lights up
# the light output
#
net carousel-motor-jog-fwd S274-input => carousel.0.jog-fwd
net carousel-motor-jog-rev S216-input => carousel.0.jog-rev

net carousel-homed carousel.0.homed => atc.led-carousel-homed
net carousel-current-pos => atc.number-position

  • Shu
  • Shu's Avatar
18 Oct 2026 17:06
Replied by Shu on topic Tuning Steperonline A6 Servos

Tuning Steperonline A6 Servos

Category: EtherCAT

script for tuning the servos over the ethercat bus with the most important parameters:
github.com/shulter/biber-ethercat/blob/main/tools/servo-tune.py
  • Shu
  • Shu's Avatar
18 Oct 2026 17:03
Replied by Shu on topic New User Lichuan CL3 57E and Stepper Online A6 - Problems

New User Lichuan CL3 57E and Stepper Online A6 - Problems

Category: EtherCAT

 
github.com/shulter/biber-ethercat/blob/main/tools/servo-tune.py
here is a script for tuning the servos over the ethercat bus with the most important parameters. it's hardcoded for one of my machines, just edit it. (todo: implement a bus enumeration at startup, get rid of the hardcoded stuff)

and here a working config with stepperonline a6 and beckhoff ek1100: github.com/shulter/biber-ethercat/blob/m...ax/ethercat-conf.xml

 
  • Shu
  • Shu's Avatar
18 Oct 2026 17:02
Replied by Shu on topic A6 1000w troubles.

A6 1000w troubles.

Category: EtherCAT

github.com/shulter/biber-ethercat/blob/main/tools/servo-tune.py

here is a script for tuning the servos over the ethercat bus with the most important parameters. it's hardcoded for one of my machines, just edit it. (todo: implement a bus enumeration at startup, get rid of the hardcoded stuff)

it wasn't possible to get the stepperonline tuning software for windows to talk to all servo drives simultaneously. it was really annoying to tune a dual servo gantry that way.
  • Lcvette
  • Lcvette's Avatar
18 Oct 2026 16:36
Replied by Lcvette on topic calling all probe basic lathe users!

calling all probe basic lathe users!

Category: QtPyVCP

hit me up on the qtpyvcp chat for beta testing information
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