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Thanks for laying this out. One question remains: what if linear scales come into the equation? Specifically ones that are connected to the servo drive and fed back to linuxcnc via ethercat.
I’d assume thatcher best approach would be to handle this feedback in the drive (again). However, what about gantry setups?

(Ich hoffe englisch ist okay für dich)
I guess the problem here is that the modbus data are usually 16 bit wide and so does mb2hal interprets them.
But as the Linuxcnc HAL don't have have s16 and u16 types, the types in the C-code are chosen to match the HAL types so s32 is used for integer, so it will never wrap.
A possible fix for mb2hal would be to use s16 and u16 internally and then cast them to s32 and u32. But then we need a new for pin for each function code...

But until this happens ... I don't really see a better way than using a custom component like Andy suggested.

OK, spindle weirdnesses dealt with.

What should I use as a PC?
I want a mix of being small and reliable, as well as being cheap and easy to deal with if it dies on the customer end. So probably not some all in one pc box.

I guess we need at least 2 ethernet ports if we choose ethercat.

Anyone got a recommendation for a reliable cheap mini itx board that will work well with ethercat or mesa?

fish, do you have any info on the legislation? since it directly related to me I would like to understand/ complain to my mp

rodw wrote:

The joint axes that were added in 2.8 require homing before jogging as your error says.
I just got into the habit of hitting home all after power up so its not onerous and generally not difficult to add the required switches.
 

Got it, interesting.
 In the machine and in the old configuration of this machine that I built now, before using two sensors to square, I had the habit of doing the homing with the inductive sensors on the axes.
 But as in the previous format I was able to move the axes before homming, I found it strange that I tried to do the same now and the error message appeared.
 I will do new tests as soon as possible, thank you for the information and help.

New variety.
Here I understand there are problems with the settings.

 

I am sure the hal_gpio driver was tested and working very early in the piece from earlier forum comments.
linuxcnc.org/docs/stable/html/drivers/hal_gpio.html
The gpiod library used here is meant to be a generic GPIO driver (I think at the kernel level) that is designed to be multi platform so its unsurprising it works on the Pi5

But this does not appear to help with SPI unless its supported by gpoid

The joint axes that were added in 2.8 require homing before jogging as your error says.
I just got into the habit of hitting home all after power up so its not onerous and generally not difficult to add the required switches.

There were 3 files in the archive with examples; I uploaded the bit file to the board. What to do with bin files?

rv901t_4out__3stepgen_2enc_1pwm.bin  
rv901t_4out__3stepgen_2enc_1pwm.bit  
rv901t_4out__3stepgen_2enc_1pwm_initial.bin

rodw wrote:

You need to Home all before attempting to jog
If you don't have home switches, you will need to add them for a gantry as they are mandatory.
 

So with this configuration I need to do homming to release movement, right? Before, in the standard configuration of 3 motors, I moved the machine before homing without any problems...

I've been dealing with Linux recently, I decided to try it because there are no adequate control systems available, and Linux can do a lot. More than mid-range systems.
Excuse me, I’m certainly not a noob and managed to remake the board and flash the initial firmware, then update it via mesaflash.
but apparently the item to update LinuxCNC is not clear to me and I missed it.
Have mercy, tell me what to do.

The first time I uploaded the configuration from the example rv901t_4out__3stepgen_2enc_1pwm. Another time litehm2. 
The pinout changes, linux sees it, identifies the lhm2 board through a search, but for some reason it asks for how many connectors and ports, I indicate 3 to 24.
 
 

LinuxCNC 2.9.2 LiteHM2 board include

You need to Home all before attempting to jog
If you don't have home switches, you will need to add them for a gantry as they are mandatory.

The XML file you are using is for Twincat on Windows
It is useless for Linuxcnc.
Please review the example XML files in the config you cloned.
You need to write something similar for your drive and other slaves you are using.

I managed to test it just now and every time I try to move an axis, a new warning like the one in the image appears.
 No engine moved...