Hey, tested your proposal for panning/zooming => works nice!
 

7I97T config with 7I74 on expansion port with 8 BISS absolute encoder interfaces:


 

 

The preview window has a similar problem to the Vismach. There's no limit at all to the maximum and minimum zoom. You can zoom in infinitely without any visual effect, and the same applies to zooming out. There's also a tweak to the s value, which doesn't work linearly with zooming in and out, and at certain zoom levels, moving left, right, and up is difficult.

I'm uploading the corrected glnav.py.
Please try it out.

For now, the world is silent. Maybe it's not so bad...

I am trying to install LCNC (debian12) onto a new second hand Dell desktop. I have copied configuration files across. but when I try to start the software I am getting this error:
iopl() failed: Operation not permitted
cannot gain I/O privileges - forgot 'sudo make setuid' or using secure boot? -parallel port access is not allowed
Note: Using POSIX realtime
Linux parallel port 0 not found
hal_parport: rtapi_app_main: No such file or directory (-2)
./4_Axis_Mill.hal:6: waitpid failed /usr/bin/rtapi_app hal_parport
./4_Axis_Mill.hal:6: /usr/bin/rtapi_app exited without becoming ready
./4_Axis_Mill.hal:6: insmod for hal_parport failed, returned -1
4976
Stopping realtime threads
Unloading hal components
iopl() failed: Operation not permitted
cannot gain I/O privileges - forgot 'sudo make setuid' or using secure boot? -parallel port access is not allowed
Note: Using POSIX realtime
Any Help gratefully received
Thanks

I used to work in an environment that required high reliability. Hot-swap spares were the norm and that includes software. If you were updating software, it was done on a second (or sometimes even third) device to ensure that you always had 1 working production device and often a working spare as well. This philosophy is required in some industries, but many have moved away from it due to the cost. For a long time, downtime was forbidden. Now consultants or MBAs model the cost of downtime and can often justify it as critical savings in the short term. My local hospital recently rolled out a software update that brought down all their OR suites for over a week due to a driver issue.

I've been using Debian (and offshoots) for over 20 years and *nix before that. Original sysadmins were taught the importance of backups before updates as the OS itself doesn't provide a mechanism to roll back. There is an opportunity to provide better instructions to users on how to migrate a system safely, but it is a lot of work and there is always some risk.

I have linuxcnc running in a NixOS VM for simulations and might move my main controller to this one day.

thank you vm

When I updated I just started with a "fresh" hard drive. Then i do not have to deal with anything other than swapping SATA connection to get back from "experiment" to working.

My biggest problem is to keep some proper documentation (always bites me).
Trying to at least put a lot of comments into my hal and ini files.

Rykagon wrote:

Hello All,

- which Linux distro to load on the Pi 4.

 

Sounds like a fun project. 
Download the SD card  image at this page .
That should be a good start Pi4 + Mesa 7i76EU + TB6600. I've played a bit with the Pi, never used it in a retrofit, but I read people doing it regularly on this forum.

Ah sorry I mixed it up with the outputs from the 7i84u card. At first I wanted to buy two of them but I saw in the manual that TB1 PINs 1-4 are responsable to feed the I/O on TB2 and TB3. I don't think I can switch off the outputs via E-Stop with this card. Besides that the 7iA0 is beefy with 2.5A and it has enough I/O so I only need one.

The 6 general purpose outputs on the 7I97T are identical to the 7IA0 outputs.
That is: uncommitted polarized NMOS SSR outputs, all isolated from each other.

 

I can take a look at this later this week

There is an entire series of threads on doing just this. I did a retrofit on mine years ago and it runs every day cutting custom parts. Works great. Forest (see his posts) also sells a retrofit board and computer that makes it plug and play. He also has spare parts available.