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- You need to mark the files 'M128' and 'M129' as executable (rightclick-> Properties -> Permissions).

I don't know about changing the key binding at run time but I would strongly advise against using keybord bindings to jog the actual machine. Much better to use hardware panel buttons connected to realtime hardware inputs.

Not sure what you mean by 'executing' a custom component. A 'custom component' refers to something that runs in HAL and as such runs periodically.
linuxcnc.org/docs/html/hal/comp.html

Do you maybe mean a 'remap' to create/redefine a g- or m-code?
linuxcnc.org/docs/html/hal/comp.html

I wouldn’t mind rewiring everything — my setup is quite simple, and the CNC machine is fairly small. For me, building and tweaking the CNC is part of the fun of the hobby.

I’ve read that many of you use various Mesa cards. I was hoping the 7i76EU alone would be a good starting point to learn how to work with Mesa hardware. Do you know if that’s the case? I saw some brutal shipment costs (like 200 dollar plus, so i will have to search for an European supplier, i'm in the Netherlands)

If the 7i76EU would allow me to completely move away from the parallel port, that would be a big plus — especially since I’m currently limited by base-thread latency.

[EDIT]

I see a seller with reasonable shipping costs, not sure if its a trusted compane EUSurplus?I think i am planning to switch to a Mesa board and wanted to check if the 7i76EU is the right fit for my setup. This is what I’m working with:

• 3x DM542A stepper drivers (they use step/dir signals)
• 3x LJ12A3-4-Z/BY inductive proximity sensors (used for homing)
• 1x Huanyang VFD (spindle, controllable via 0–10V or RS-485 Modbus (I think because i now use it over USB)

From what I’ve researched, the Mesa 7i76EU seems like the best option. Here’s why:

• It supports up to 5 stepper/servo axes via step/dir signals (perfect for my DM542A drivers)
• It has 32 opto-isolated inputs which should work well with the 24V NPN homing sensors
• It has 16 outputs, which are configurable (sourcing/sinking)
• It includes an analog spindle output (0–10V) for VFD speed control
• It supports RS-485 communication if I decide to use Modbus for the Huanyang VFD
• It isolates field I/O power from logic power, which helps protect the system

Important to note:

• The sensors might need a pull-down resistor to give clean logic signals when connected to 24V. I already solderd a pc to convert the 30V signal back to a 5V system with opto's
• I will need to supply 24V field power to the board 
• I understand the 7i76EU requires a second Ethernet interface on my PC (either a second NIC or a USB↔Ethernet adapter)
• I still need a PREEMPT-RT kernel, but I won't have to worry about tight base-thread latency anymore

Does this sound correct to those of you with experience using this board?Thanks in advance!

 

Unfortunately it happens 100% of every time.

It really feels like a bad setting somewhere, but AFAIK I haven't changed anything relevant since the last time I used it a few months ago. I've been cutting thick material for a while so I just was just using float switch probing.

What I can't get my head around is that there is no indication that the ohmic sense pin is ever on. This makes me think there is an unrelated setting keeping it from probing. I tried adjusting the probe height, but that didn't change anything.

Float switch probing continues to work fine.