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Excellent, thanks again for the help. Now, looking at what @Andy mentioned, what would be the advantage of the 6i24-16 (I understand this is the one being referred to) over the 6i25? I see that it has more expansion possibilities for the future, but in terms of processing capability and other aspects, is there any difference?

From what I’ve checked, I think that with the 6i25, 7i77 and 7i74 I already have a very large working possibility. Also, I couldn’t find a way to use a 4th axis in the future with the 50-pin options, since they come with control for 4 analog servos, and I understand that one of them would have to be used for the spindle. That means I’d have to use one of the 6i24 configurations that allows 8 servos (which in my case seems unnecessary). So I’d like to know what would be the advantages of using a configuration with the 6i24.

@Tommy, thank you very much as well for your reply to Andy. I was checking which workstation models I could use with these configurations, and I noticed that the ones you mentioned are actually available here in my country (Argentina, which has a lot of issues with getting certain hardware). So thanks to both of you, I’ll keep researching the advantages and options.

Hey !
I'm building a cnc mill with a german FS4GM epoxy granite gantry and a Spinogy X22 spindle. It's a small but rigid setup that I'd Iike to control with 400W servos, LinuxCNC and EtherCat.
Since I only ordered the mechanical parts+spindle, I still can avoid some problems (ie latency issues) by choosing the right things on the electronic/control/computer side. Hence this newbie message : 
What servo/drivers/computer/other things-I-still-don't-know-about would you go if you had to get them again ?

Cheers,
Flo

I hope a 5V 2A power supply will be enough for this work.

@tommylight
Sorry for the questions, but I'd like to get it right the first time. I'm not yet that good with various electrical components at a detailed level.
I've read through your other threads and I think I found the right info, thank you very much!!
Are the following components suitable for making a voltage divider? My plasma has a 1:1 arc output.
I'm using a TH-CAD2 in combination with two resistors in series and a 0.1uF capacitor to absorb the voltage spikes. Am I doing this correctly?
What happens if a voltage spike does occur? Will the capacitor fail?
 

I have another question.
Can I connect the start arc and arc OK signals directly to the Mesa board, or is it better to use a relay to protect the mesa board?
Can I route these signals to the plasma cutter through the same cable as the THC?
 

I will try changing the 5V power supply today and update back. Thanks..

Yesterday I tried running the VFD with a potentiometer, but had no luck. I experimented by slowly adjusting the frequency and changing some basic parameters to see if I could get any results. The only thing that seemed to have some effect was changing the V/f pattern.

Thanks! i got it running. i was able control the pins. Weirldy enough i was not able to get the stepgen running. i was not able to see anything on the oscilloscope. i did not plug the 12/24v as i thought it is not needed. I was able to pull both the dir and pulse pin high by inverting it.

Any tips are appreciated, gonna continue working on it tommorow