RPI4 Raspbian 64 bit & LinuxCNC

elovalvo wrote:

To avoid the problems of compilation and updating I prepared the image of the experimental version of which I spoke in this link.
forum.linuxcnc.org/9-installing-linuxcnc...cnc?start=170#264143

linuxcnc_book.zip

Get a new SD, install this ready-made image and try with the Mesa card.
user: cnc
pwd: linuxcnc


Let us know.

tried the image and ran my gcode 5 or 6 times without getting the "hm2/hm2_7i96s.0: error finishing read" problem, so that was great!

i did get a single joint following error, so will look into that some more...

thanks again to all of you for your help

Hi everyone,

I am a new LinuxCNC user. Over the past weeks/months I read a lot about LinuxCNC, and tried it out on my Windows PC via a virtual machine (with no hardware attached). I really like the software and decided that I am going to use it in my CNC machine. As I don’t have a Linux computer I bought a  Raspberry Pi 4 GB.

It took me a while to get LinuxCNC running on the RPi. The dedicated ISO from the LinuxCNC downloads section didn’t work, but after some frustrations I eventually got it solved by using linuxcnc_book.img. The explanation from Elovalvo was helpful for me. Thank you very much for that! 

Unfortunately I soon ran into the next issue, as I have difficulties installing QtPyVCP.
I tried to install the software dependencies with the command listed at the bottom of this page:
www.qtpyvcp.com/install/prerequisites.html

This gave me a list of error messages as attached on the screenshot.
However I continued with installing QtPyVCP, which did not generate any strange messages, but in the end it did not work so I guess it has something to do with the software dependencies.

My background is that I have quite a lot of experience in Python scripting (including graphical user interfaces) and a bit of Windows PowerShell, but apart from some very basic usage I am not at all familiar with Linux.

Actually it makes me doubt whether or not I should proceed with the Raspberry Pi approach, as I got the feeling that this is not the easiest or most robust way of using LinuxCNC… The software made me very enthusiastic when I used it on a virtual machine (without any hardware attached). But since I got the RPi things don’t go as smoothly as I hoped, maybe the learning curve is too steep for someone without Linux experience?
I was planning to order a Mesa 7C81, but as this card is dedicated for RPi I am still somewhat hesitant about that.

Does someone perhaps recognise the QtPyVCP issue and knows how to solve it?
Looking forward to your replies!

From what I see I think it's a problem due to updating.
I recommend, before installing the software dependencies, to run these commands:

sudo apt update
sudo apt upgrade

Thank you for your input, this did indeed solve the issue.

Success!
After floundering on-and-off for years (no joke) trying to get a functioning install, this thread hands me a functional solution on a silver platter ! I've somehow always managed to find myself with some sort of hardware compatibly issues - this time, just as warned, the official SD image doesn't play nicely with my Pi4 8GB . But (!), as I've already said, the image supplied by elovalvo (on page 16) is showing more signs of life than anything I've managed to procure on my own:

I have a some ways to go to get it to work with my Mesa 7C81, but I needed to make an account to say THANK YOU to elovalvo ~

There is also the Debian way. I'm hoping this will eventually be accepted into Linuxcnc docs
vmnet.com.au/linuxcnc/getting-linuxcnc.html