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Aciera wrote:

How do I speed up the homing function on each axis?
1. increase HOME_SEARCH_VEL
2. increase HOME_LATCH_VEL
3. think about homing two axes (eg X and Y) at the same time (by assigning the same 

HOME_SEQUENCE number)

Ok great thanks.  The machine is now homing quick and looks awesome!  I also set the X and Y to use the same HOME_SEQUENCE and is great.  Thanks

Yes, too high a P term in the local feedback loop can do this.

For Mesa hardware P should be 1/servo_thread_period
so 1000 for a  1 ms (1000000 ns) servo thread period
or 500 for a 2 ms period.

Don't have an image to check ATM regarding the paths, had to clear some stuff from my desktop. From memory it should be /boot/broadcom/
You'll be able to check for sure when building.
scp is part of openssh-client deb.

gvfs-backends makes it easier to connect to servers from the file manager.

Thanks for the feedback.
Notes about the Pi5 and no spi is on the downloads page.
The kernel version is no different to what we have done previously. I page back through the Pi kernel commits from current day until I find where they merge a kernel version that aligns with an RT patch. We clone at that commit. it would be very time consuming to find earlier versions. Kernel 6.6.39 is the latest long term supported kernel but it does not have an RT patch and was not merged into the Pi Kernel so to be at 6.6.35 should be stable for a long time.

I don't think any of the programs you mention are included in the amd64 installer or Debian Bookworm. scp should be available to copy files from the command line to/from other PCs. Can you check it is there?

Can you advise the exact locations (eg. full path) of config.txt and cmdline.txt? 

Whilst that could be a possibility the noise would need enough strength to drive the optocoupler in most stepper drivers. Unless there is an awful lot of noise.

I think (and I maybe wrong) PID numbers can still have an affect in open loop configs, here's a brief discussion
forum.linuxcnc.org/38-general-linuxcnc-q...loop-steppers#119303

gvfs-backends, can't remember if that comes std or not. But lets you connect to other computers via all your usual network filesystems, even sftp if the other machine is running ssh (dont ask about windows on that one), but also smb shares.
Midnight commander, great for when you're on the command line and need a file manager, clone of the old Norton Commander, comes with a pretty good editor, imagine dos EDIT on steroids, can also connect to other Linux machines for transferring files.
Rather than jumping on the latest kernel bandwagon, I suggest looking at those available and see which one gives the best all round latency, yes I know that sounds a bit controversial, but you know sometimes I'm a bit odd. It maybe that the 4 & 5 need different versions. Yeah I know not a real pleasant thing to do, and something difficult if you don't have the hardware at hand. But then again if there's only a poofteenth in it, go with whatever is the latest.
Oh and make sure that's stated very clearly in big stonking red letters where the config.txt and cmdline.txt files are. A lot (maybe just some) people assume that just because they are using a RPi that those 2 files are in a different place......the curious ones look at the sud dir of boot, others just give up and create config.txt where the Raspbian OS has it. And for those that have a bit of knowledge, kinds mention whilst the distro is based on Bookworm, the kernel is a Raspberry Pi kernel and supports overlays. A user the other day was under the impression that because it was a bookworm based distro the kernel didn't support overlays, cause the kernel Debian uses doesn't.
If not the case enable the spi interface by default, and maybe disable blue tooth. I usually disable sound, but that's a personal thing.
And on the release page change that bit that SPI is supported on the RPi5, if that hasn't already been fixed.

Another one from left field, since now with the update eeprom you can install an image directly from the net on the RPi5 and 4 this is not possible for this image. It's pretty cool, boot with blank media in the RPI, it connects to a server, downloads the RPi imager and then writes the image you choose from imager's list. I used this method to install Raspbian directly to a NVME ssd on the 5.


Plus it should know what I want to machine and do the CAD & CAM without any inpout from me. (and no cad & cam needs to be installed, it just knows)

typically jitter on steppers is due to electrical noise leaking in to the step/dir lines

Guys, with the release of Linuxcnc 2.9.3 I was going to look at building  new images for the Pi 4b and Pi 5 for the downloads page.
It looks like this will be able to use the 6.6.35 PREMPT_RT kernel. This is because kernel 6.6.35 was merged into the Pi kernel on 21 June 2024.
That is the latest Pi kernel version matching to a PREEMPT_RT patch.
There are also many changes to the build enviironment.

So here is your chance. If there are specific packages you think should be included in the official images, please list them on this thread.
I am still reluctant to include a network manager because of its affect on latency and an alternative method to set your wifi credentials is included.
Setting a fixed IP address is covered in the hm2_eth man page.

There is something wrong when it can't find lcec_conf. Maybe later versions place it in a different folder
Have you installed linuxcnc-ethercat?

I want independent axes as I have a weight on one side instead of a spring - this allows me to make tapered cuts. It's all working now

Do you get a red /INIT LED illuminated  when simply powering the 7I96S?
When cycling the 7I96S power, both the /DONE and /INIT
red LEDs will blink briefly but then should go out. If they remain
illuminated after power up, this indicates corrupted flash memory.
(with one exception (W4,W5 up,up) shown below.

An illuminated  red /INIT LED can occur after running LinuxCNC as
this indicates a watchdog fault (a normal occurrence when linuxCNC is exited)
You can reset this by cycling the 7I96S power

If so, can you try changing the IP address jumpers (W4 and W5)
to the "up,up" positions and cycling the 7I96S power?

If that gives you a blinking red light, you can try and reflash the card
 

Probe Basic.

now you want to build a deb as follows, In a terminal enter the the below commands one line at a time, this will build a deb that you can install on your machine.


Now you will install it on the machine pc with the following line:

i've tried a couple different power supplies. how do reflash the 7i96s?

Ich hab jetzt auch eine kleine Drehbank - China Böller. Hab ich günstig bekommen. Muss jetzt jedoch noch umgebaut werden. FluidNC war der erste Gedanke, da die Portalfräse darauf läuft, aber für eine Drehbank nicht die beste Wahl. grblHAL war der zweite Gedanke. Unterstützung für Drehbank und eine gewisse Werkzeugdatenbank. Dann hörte ich von Remora - RasPi vorhanden, nen altes Board mit =16pxstm32f407zgt=16px6 ein =16pxBTT SKR Pro v=16px1=16px.1 und die meisten anderen Sachen waren auch da.

Jetzt diegt der Fokus doch erstmal auf LinuxCNC. Wäre schön das hin zu bekommen.

Mechanisch ist das Projekt so Geplant das als Antrieb ein AC Servo ist und X und Z werden mit Kugelumlauf angetrieben. Werkzeugwechsler manuell, aber mit Schnellwechsler.

Der RasPi hat schon das Offizielle Image bekommen, von Remora hab ich erstmal das Image für den SKRv2 genommen, da es meiner Meinung nach, am ähnlichsten ist, die Konfigurationsdatei hab ich vorerst mit den Pins vom Board angepasst.

Die Frage ist jetzt, muss ich Remora extra für das Board Kompilieren, oder reicht die anpassung der Konfig.

Welche Oberfläche ist für eine Drehbank am vorteilhaftesten. Die Werkzeugdatenbank mit darstellungen der Werkzeuge wäre super. Ein paar Cyklen wäre wünschenswert, aber zu 90% werde ich wohl mit Inventor CAD / Cam Arbeiten, da ich das für die Fräse auch so mache.

Das Nächste das gelöst werden sollte ist, das die Spindel überwacht werden muss, um Gewinde schneiden zu können.