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Hi.
In linuxcnc we have g10 l2 px rx and rotation plane xy around z on px origin selected.

For plane g18 not have implementation for linuxcnc ?

Thanks

Kernel built whilst using Rod's imager, running over a ssh session.

Thank you for your response, but I forgot to include it in the .ngc file - I have tested it before and it does not help in my case.

You are welcomed, always.

gene_weber wrote:

I will probably create a separate thread about jitter optimization.

This is badly needed based on the reported latency which is unusable

Try setting the arc distance mode at the beginning of the program
linuxcnc.org/docs/stable/html/gcode/g-co...ml#gcode:g90.1-g91.1
some times the code is in absolute mode and QTplasmac is expecting relative mode or vice versa.

I used 7-zip application to open and extract the files to the computer.

Thanks for providing the files.

I have a 4b that is bricked like this.
Try updating the firmware using the Pi Imager. That may work. Otherwise I have no solution

Hi

I too downloaded the zip file on Jan. 2025, but it didn't extract correctly also

Please check the files and provide a new link to the repaired files.

Thanks

Hello,
i get the same error in QtplasmaC v2.9-238.314 RIP with EN (and SK) locale and Metric system. I have tryed to change CENTER_ARC_RADIUS_TOLERANCE_MM for my machine, but without luck. It seems that this tolerance stays default and does not change. Unfortunately, I cannot change generated tolerance from this cad/cam. This software is prahistoric but I am bound to it because it has functions for generating custom hvac components and nesting. Problem is that generated files from this cad/cam are only with 0.1mm accuracy. 


the error is reasonably small for my application

 
changed ini file, I have also tried to use bigger tolerance = 0.5

 
this is how the workpiece should look like.

 


 

Salame wrote:

I have found this combo and read somewhere that they are somehow rebranded Leadshine, they comes with a good documentation (For what I can understand). 

Late response, but the A6 series are rebranded Inovance SV660's.  The Ethercat version is SV660N.

Inovance offers both 17-bit and 23-bit encoder motors, but Stepperonline appears to only offer the 17-bit version.

Stepperonline's "T6" servos are rebranded Leadshine EL6's.  Looks like they've dropped the "T7" series of ethercat drives which were available last year.

Side note: From a couple YT vids I watched, Tormach appears to be using Inovance SV660N's in the MX1500.  They also appear to have made their own breakout board to use the SV660N's onboard IO, rather than buying (or building) a separate dedicated ethercat IO board.

No idea what the spindle drive is; maybe an Inovance ethercat VFD.

With four drives (X/Y/Z/ATC), this would give them 20 inputs and 12 outputs... not including assignable IO from the spindle drive.

Create the base .config file for the Raspberry Pi 4 64-bit:
NOTE: For a Raspberry Pi 5 64-bit the lines should be:

Make / launch the menuconfig utility:
Install the required package:
Under General Setup, select: Fully Preemptible Kernel (Real-Time)Exit and Save.


Change Local version name. vi .config and change the following line:To:

Build the kernel and log the output (Note this took over 2 hr 10 min):
NOTE: During the compilation process the temperature of the ARM processor increased from ~30°C to as high as 43°C. I have a heat-sink and cooling fan on my Pi. If you don't, you may want to keep an eye on the temp (/usr/bin/vcgencmd measure_temp). The maximum rating on the Pi is 85°C.


Install the kernel modules onto the boot media and log the output:
create a backup image of the current kernel, install the fresh kernel image, overlays, README, and unmount the partitions:

Reboot the Raspberry Pi to run the new kernel:
Check kernel after reboot:    Linux raspberrypi 6.13.0-rc7-rt3-v8_full_preempt+ #1 SMP PREEMPT_RT Tue Jan 14 12:49:46 EST 2025 aarch64 GNU/Linux


From the LinuxCNC downloads page , download LinuxCNC Uspace 2.9.3 arm64 .

Install the Gdebi installer:Run the Gdebi installer and install linuxcnc-uspace_2.9.3_arm64.deb

EDITED 1/16/25: Changed image to X11 pre-optimization latency.
Ran a baseline latency test before making any jitter optimizations.    Note: Using POSIX realtime


I checked the real-time attributes of the latency-histogram process (the process ID for this run was 10527):    pid 10527's current scheduling policy: SCHED_OTHER
    pid 10527's current scheduling priority: 0

I had thought the policy would be SCHED_FIFO, or SCHED_RR. But even after I added CPU isolation it remains SCHED_OTHER.

I will probably create a separate thread about jitter optimization.

I'm posting the steps I executed to build and install a PREEMPT RT Linux kernel in Raspberry Pi OS for my Pi 4B for two reasons.

1. Hopefully it helps someone trying to do this or something similar. I appreciate the pointers I got from alangibson, cornholio, and rodw
2. This is the first Linux kernel I've ever built. So I open this up to comments and suggestions.

NOTE: Version 6.13 of the Linux kernel is under development and could have bugs / issues. So far it's been stable for me, but your mileage may vary.

I started with a fresh installation of Raspberry Pi OS on my Pi 4B.

1/16/25 Edit: Based on responses after the initial post it was clear that the Wayland display protocol is non-optimal for LinuxCNC. A comparison of the baseline pre-optimized jitter was conducted where the only difference is the display protocol, Wayland vs X11. The latency histograms for each are included in those posts, and show a dramatic difference with X11 inducing significantly less jitter. Wayland is the default in the current Raspberry Pi OS, but is easily changed to X11.

You can check the session type:    wayland

Launch Rasp-config command line tool in a terminal:Arrow down to "Advanced Options", and enter.
Arrow down to "Wayland                 Switch between X and Wayland backends", and enter.
If not on the line that says "W1 X11     Openbox window manager with X11 backend", arrow to it and enter.
The popup should say "Openbox on X11 is active" and have "Ok" highlighted. Enter.
It will return to the main screen. Use left-righ arrows to select "Finish". Enter.
Popup asks if you would like to reboot now, with "Yes" highlighted. Enter.

After reboot:    x11


Raspberry Pi's documentation on how to build a kernel was used as the guideline for this process:

Download the source code for the 6.13 Raspberry Pi kernel:
Install the needed build dependencies:

Download the RT patches for v6.13 and the signature file. Starting here , select the tarballs link at bottom left of page. From the list of versions, select the 6.13 link .
Download the patch file patch-6.13-rc6-rt3.patch.gz:Download the signature file patch-6.13-rc6-rt3.patch.sign:

Verify the signature of the patch file. These were committed by Sebastian Andrzej Siewior.
Add the following two lines:
Get the public key for "Sebastian Andrzej Siewior <This email address is being protected from spambots. You need JavaScript enabled to view it.>"
Unzip the patch file:
Verify signature:    gpg: assuming signed data in 'patch-6.13-rc6-rt3.patch'
    gpg: Signature made Thu 09 Jan 2025 05:04:09 AM EST
    gpg:                using RSA key 57892E705233051337F6FDD105641F175712FA5B
    gpg: Good signature from "Sebastian Andrzej Siewior <This email address is being protected from spambots. You need JavaScript enabled to view it.>" [unknown]
    gpg: WARNING: This key is not certified with a trusted signature!
    gpg:          There is no indication that the signature belongs to the owner.
    Primary key fingerprint: 6425 4695 FFF0 AA44 66CC  19E6 7B96 E816 2A8C F5D1
         Subkey fingerprint: 5789 2E70 5233 0513 37F6  FDD1 0564 1F17 5712 FA5B


Go back to the linux directory created by the git clone:Patch the 6.13 RT kernel:    patching file arch/arm/Kconfig
    patching file arch/arm/kernel/module-plts.c
    patching file arch/arm/kernel/traps.c
    patching file arch/arm/mm/fault.c
    patching file arch/arm64/kernel/ftrace.c
    patching file arch/arm64/kernel/traps.c
    patching file arch/loongarch/kernel/ftrace_dyn.c
    patching file arch/loongarch/kernel/unwind_orc.c
    patching file arch/powerpc/Kconfig
    patching file arch/powerpc/include/asm/stackprotector.h
    patching file arch/powerpc/include/asm/thread_info.h
    patching file arch/powerpc/kernel/interrupt.c
    patching file arch/powerpc/kernel/trace/ftrace.c
    patching file arch/powerpc/kernel/trace/ftrace_64_pg.c
    patching file arch/powerpc/kernel/traps.c
    patching file arch/powerpc/kvm/Kconfig
    patching file arch/powerpc/lib/vmx-helper.c
    patching file arch/powerpc/platforms/pseries/Kconfig
    patching file arch/powerpc/platforms/pseries/iommu.c
    patching file arch/s390/kernel/dumpstack.c
    patching file arch/x86/kernel/callthunks.c
    patching file arch/x86/kernel/dumpstack.c
    patching file arch/x86/kernel/unwind_orc.c
    patching file arch/xtensa/kernel/traps.c
    patching file drivers/gpu/drm/i915/Kconfig
    patching file drivers/gpu/drm/i915/display/intel_crtc.c
    patching file drivers/gpu/drm/i915/display/intel_cursor.c
    patching file drivers/gpu/drm/i915/display/intel_display_trace.h
    patching file drivers/gpu/drm/i915/display/intel_vblank.c
    patching file drivers/gpu/drm/i915/gt/intel_execlists_submission.c
    patching file drivers/gpu/drm/i915/gt/uc/intel_guc.h
    patching file drivers/gpu/drm/i915/i915_request.c
    patching file drivers/gpu/drm/i915/i915_trace.h
    patching file drivers/gpu/drm/i915/i915_utils.h
    patching file drivers/tty/serial/8250/8250_core.c
    Hunk #1 succeeded at 403 (offset 15 lines).
    Hunk #2 succeeded at 411 (offset 15 lines).
    Hunk #3 succeeded at 541 (offset 15 lines).
    patching file drivers/tty/serial/8250/8250_port.c
    Hunk #4 succeeded at 3317 (offset 9 lines).
    Hunk #5 succeeded at 3350 (offset 9 lines).
    Hunk #6 succeeded at 3409 (offset 9 lines).
    Hunk #7 succeeded at 3475 (offset 9 lines).
    Hunk #8 succeeded at 3618 (offset 9 lines).
    Hunk #9 succeeded at 3628 (offset 9 lines).
    patching file include/linux/kallsyms.h
    patching file include/linux/module.h
    patching file include/linux/preempt.h
    patching file include/linux/serial_8250.h
    patching file kernel/cfi.c
    patching file kernel/jump_label.c
    patching file kernel/kprobes.c
    patching file kernel/ksysfs.c
    patching file kernel/livepatch/core.c
    patching file kernel/module/internal.h
    patching file kernel/module/kallsyms.c
    patching file kernel/module/main.c
    patching file kernel/module/tracking.c
    patching file kernel/module/tree_lookup.c
    patching file kernel/module/version.c
    patching file kernel/sched/core.c
    patching file kernel/static_call_inline.c
    patching file kernel/trace/bpf_trace.c
    patching file kernel/trace/trace.c
    patching file kernel/trace/trace_kprobe.c
    patching file lib/bug.c
    patching file lib/dump_stack.c
    patching file localversion-rt

You still did not answer what the Z motion range was?
Answer: Sorry, I didn't understand the question, due to the automatic language translator. But you got it right, 50mm, in the photo below.

 

regarding the model code it worked! the Z axis movement works without error. Thank you