Retrofitting a 3-axis VMC with DC servos - guidance needed

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01 Sep 2025 11:07 #334220 by Japoo_Ness
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.
The following user(s) said Thank You: tommylight

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01 Sep 2025 12:27 #334226 by Japoo_Ness
Hello again,

While checking availability, I noticed that in terms of cost and stock it might be more convenient to go with the 6i24, since it is currently available directly from Mesa USA. Otherwise, I would need to buy everything from Eurosurplus, which ends up being more expensive overall.

Could someone please confirm the main differences between the 6i25 and the 6i24? From what I see, the 6i24 has no limitations on its connectors, so in the future I could also leave an extra port available to add another servo control board if needed.

Thanks a lot for your help!

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01 Sep 2025 13:42 #334228 by tommylight
There is another Mesa shop in the US
www.mesaus.com

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01 Sep 2025 21:01 #334239 by Japoo_Ness
Yes, but looking at those always there's something that's not available.
Since I'm out of the United States, I wanna buy all from the same provider.

I'm thinking if it's a good idea to use the next configuration:
1x 6i24-16
2x 7i36
1x 7i44
1x 7i73

One of the 7i36s is if I want to install a fourth axis, but I'm using all the connections on the 6i24.

The next configuration I'm looking at is:
1x 6i24-16
1x 7i48
1x 7i44
1x 7i73

In this one, connectors are unused, and I can control 4 axes, a spindle, and the rest of the machine in both configurations.

Can someone explain to me if one is better than the other (don't taking into account that one has one more connector available)?

I haven't found anyone that used the 6i24 with the 7i48. The 2x7i65 is in the manual of the 6i24. It shows as a supplied configuration.

There is some limitation in the ports or the cards that i can use?
cause looking at it do not say anything like that.
And what are the chance that the second option (7i48) came available soon in mesanet

Thank you so much guys again.
You are helping me a lot.
Cheers

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01 Sep 2025 21:07 #334240 by PCW
What about a 7I97T +7I73?
 

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