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f355 wrote:

SPI works fine, it is in fact what I'm using - my little pet project is here, it is basically a rewritten Remora for a particular off-the-shelf machine. The servo latency is alright too.

I'm not insisting my approach is better for everybody, I just found it easier for myself to write a few shell scripts (install.sh and linuxcnc/pi_init/ in the repo) that set up things on the stock RPi OS image. The official linuxcnc image might have ssh enabled, but the wifi is not, or at least I couldn't find a way to configure it with my SSID quickly, and connecting Ethernet is about as much hassle as connecting a display

please read the notes on the downloads page to install wifi SSID. It is included but in the interest of latency, a network manager is not included.

Debian includes a RT kernel for the Pi 4b and it is possible to get a working RT linuxcnc install using the Debian images. But the RT kernel was not installed as a dependency from linuxcnc-uspace and needed installing separately with something like sudo apt install linux-image-rt-$uname -r) (might not have that correct. The only catch is that the images only install a text terminal with a root user. You needed to add a user, add sudo rights and then install xfce to get a working system ut it is quite doable. Sadly it does not appear support continued to the pi5.

For the Pi5 users:
www.linuxcnc.org/temp/linuxcnc-uspace_2.9.7pre_arm64.deb

@f355

I've tried looking for a RT_PREEMPT kernel in the repos, but could only find kernels that were configured for Real time not Preemptive real time (which is what Linuxcnc requires).
Debian doesn't have any support for the RPi5 as it doesn't have enough upstream kernel support.
wiki.debian.org/RaspberryPiImages#Overview

and

raspi.debian.net/tested-images/

So to get a full RT_PREEMPT kernel the only solution it would seem is to roll our own. Which would not be a suitable solution for upgrading.

One solution maybe if Linuxcnc could host suitable kernels, but I really don't see the sense in a regular upgrade regarding the kernel in this situation. I'm still running the original kernel that was built whilst building the image in Jan 2025.

BTW running pi-gen builds a couple of flavours of images everything from lite to a fully image. Tho it does use a significant amount of disk space.

I am using the Trixie version of live-build, and building on Trixie.
(I basically did a search-replace for "bookworm" in linuxcnc-live-build and swapped to Trixie. though manually and checking surrounding code.)

So I am puzzled where the splash has gone to..

Was replying to you on the laptop but didn't have the ISO there so had to swap machines. Well creakily walk upstairs, I swear I've skipped old age and just gone straight to decrepitude......enough banter.

I guess this is what your are referring to. I would say it appears as it should. Mind I haven't had a chance to test on real hardware yet.


Basically I started with a fresh fork from your repo and made the changes I thought would be required. 
Me repo and branch can be seen here, I've tried to comment the changes made within the files and within the commits as well. I think I've even mentioned using the live-build version as well.
github.com/ozzyrob/linuxcnc-live-build/tree/ozzyrob-trixie-test

Whilst I was building on my Bookworm machine I did build a live-build package & install using this the below linked codebase, installing the Trixie package on Bookworm didn't give successful results:
If using a Trixie machine to build everything should be ok. I also found using the same source and building a package for Mint 22.1 gave a successful ISO. I think I may have mentioned this before.
salsa.debian.org/live-team/live-build/-/...rixie?ref_type=heads
Which is the code base for the live-build package for Trixie.

I hope this helps.
Cheers Rob

 

"An sbc like rpi5 or opi5 will be enough using GPIO headers
and 24v breakout board for driving electro valves ?"

Be sure to check the total source and sink current limits of the RPi.

Even if each output draws very little current, if you have 20 outputs, that can add up to a lot in total.

3V relay that can be controlled by a Pi (if current sourcing limits permit):
www.lcsc.com/product-detail/C136110.html
www.lcsc.com/product-detail/C133323.html

I bought similar relays (same company) and its 5V, 12V, and 24V variants and they were all good, though a bit audibly noisy.

unknown wrote:

Not even going to bother to upload to Google drive and ask for any help testing as it was a waste of time. I guess people are busy.

I have attempted to update the linuxcnc-live-build repo to Trixie, and have built an ISO myself. 
But it seems pretty unstable on my test motherboard. Also, the LinuxCNC splash-screen isn't showing behind the boot menu (where you get to choose to run the live image or to install) 
The latter issue has me a bit puzzled. Did that show on your image? Was your starting point linuxcnc-live-build or did you find the official Trixie config set (I haven't found that) 
 

It might be useful to way where the lathe is? I am assuming UK from the pricing.

(This isn't an expression of interest, I am afraid, I don't have the space, or the time)

I really don't recommend you remove the switches or the hydraulic system.

Hydraulics are good (and quite expensive).

Photoelectric sensors burn out eventually, but switches last almost forever if they aren't really switching any current.

Solid-state stuff is generally not dramatically better than an equivalent mechanical option.

A fast SSD is marginally better than a fast HDD most of the time.

A mechanical relay can do almost everything a SSR can do, with only slightly higher power consumption, for a fraction of the price.

There's definitely a reason most constuction machinery is hydraulic; hydraulics are expensive, compaines would use cheaper options if hydaulics weren't so good.

Hi Rob, how's going over there? You still making model car parts?

Pop in the IRC. Note: #linuxcnc has moved to Libera.Chat and #flex-dev is my channel

JT

4 X max31855 or max6675 will read the thermocouples of heaters
and linuxcnc will do the pid driving solid state replays for temperature regulation. I plan to use an sbc like rpi5 or opi5 with touch screen.
Now for plastic dosing the are mechanical regulators with switches
that the plan is to replace with linear encoders or linear sensors measuring distance and limit switches replaced by photoelectronic or induction sensors.
An sbc like rpi5 or opi5 will be enough using GPIO headers
and 24v breakout board for driving electro valves ?

Also am looking if it is possible to remove all hydraulic system
and convert it to pure electric machine with servomotors
because mold locking is done with toggle mechanism.

more images 

Location UK, Cambridgeshire

For sale i have a used Citizen L16 it has 20mm upgrade guide bush for it also
,love to see it go to someone who can maybe retro to linuxcnc and get some devloment progress on dual spindle programing and multi spindle/dual path programming

 reason for sale its not being used  as i upgraded to a M20 Citizen slider in its place and no space to have both.
price - £1500
buyer picks up i can load to buyers transport with pre aranagment , or send your own machine mover as it is a pickup and go no skating needed.

the origianl control does dual path program, $1 for main, $2 for sub,$3 is for setup pramiters have made many parts of all types on it, in materials from Steels, Stainless, Titanium etc never a problem for this machine.holds grate tollerance, all axis work fine, all spindle work grate axis

programable , Z1,X1,Y1 , Z2,X2Spindles 3, Main (+indexing),
Sub & Power toolingBar feeder ready interface (was ran on Imeca magazine)
can only work on simple single bar type barfeeders also.

can run ground or non ground bar on it
Main & Sub spindle uses F25 collet type, very common to find - sorry i dont have any i can include as our new machine uses this type also. 

has power tooling on the main slide,
i have the slide unit that runs 1x power tooling , also slide unit that takes 2x power tooling. these are easy to change over,
and in the control you tell the machine which unit is in use and it will adjusts all offsets etc for the slide units. 

machine has dual path programing so main and sub slides can do there own things, or work together. very powerfull machine when used to true protentional.i have the manual for the machine, paper copy only includs drawings, programing and using of the machine.

Guide bush type depends on guide bush module in use (max 16 OD unit type B238 (61.002), or max 20mm OD unit type B261 (22.001))
i have a driven and static guide bush unit for the B238 types - included in price (photos now added of these)

i have a handfull of B238 Collets i will include in the sale for free , alot are odd sizes from running plastic bar & aluminium.sorry no main orCollets included now added in photosall collets are round,
Sizes are: 2x10mm, 7mm, 3/8",9/32",8.5mm,9/16", 5/8", 6mm, 13.5mm, 1/4",16.6mm,12.85mm,16mm,2x8mm  

has indexing on the main spindle only, this is every 15deg with a lock peg to hold position, sorry no true C axis 

power tooling holders take standard ER16 Collets. 

have upgraded the old inverters to newer Mitsubishi units for the main and sub spindle upgrades aprox 3 years ago, also upgraded the old DC power tooling motor to AC servo motor so more speed & Torque than standard.
had a new encoder on Z2 motor about year ago. 
also changed the old CRT to LCD screen

the machine is fully barfeed ready with a socket for the interfacing of a magazine type barfeeder,
there is no bar feed included as we used this on our new machine. but i do have a LNS magazine barfeeder that i belive could be made to work/talk to this machine that i can offer  to the buyer with machine for £500 

machine is underpower but has been in storage for awhile now and has lost its pramiters, i do have these but it requires reloading due to it being in storage batterys are flat in it ,
machine is sold as seen but was fully working and making parts untill our new machine arrived.

no tool holders included sorry. 

machine weight Aprox 1Tone
machine requires 3 phase 400v supply to transformer which is included for the machine 400 to 200v 3phase 

any questions please contact us,

if you wish to view the machine please contact me
.questions please post here it is listed else where also.

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