Use the 7i96s card to control a single axis +/- 10volt servo motor.

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24 Apr 2024 05:12 #298965 by Ronniecnc
Hello, it will be possible to use the analog output port of the 7i96s card to control a single axis servo motor setup, the driver needs +/- 10volt plus 7i96s encoder.

Another question, could someone give me some information about these CMC drivers model c44-34509?



Thank you.
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24 Apr 2024 12:10 #298990 by tommylight
Probably yes, but only in one direction, and will need 10V provided to it.
Might work for spindle...
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24 Apr 2024 13:21 - 24 Apr 2024 13:22 #298997 by PCW
It might be possible to get +-10V out of the 7I96S but its a bit
ugly since you would require a split +-10V supply and you
would end up with -10V at power up. A more expensive but
better solution would be to add a 7I83, but that's overkill
with 6 +-10V channels
Last edit: 24 Apr 2024 13:22 by PCW.
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24 Apr 2024 14:07 #299002 by Ronniecnc
Thanks for the answers. To be honest, I'm not sure if the SIG 1+ and SIG 1- control inputs on that CMC digital driver are PWM CW and CCW or Step/dir instead of +/- 10 volts. Any suggestions on how to test this would be greatly appreciated.

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24 Apr 2024 16:24 #299008 by PCW
Those really look like analog +-10V drives

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24 Apr 2024 16:35 #299009 by Ronniecnc
Thank you very much, I'm going to try with a potentiometer connected to a 1.5volt battery for safety.

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24 Apr 2024 17:48 #299012 by COFHAL
I already tried that and it damaged my 7i96S, I think it's very risky. The best is the solution that PWC recommends, that's how I did it and I have no problems controlling sevos with drivers that use +-10 for their control. The only thing you need to use is firmware where you replace the STEP DIR with outputs for PWM and DIR.

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24 Apr 2024 18:48 #299018 by Ronniecnc
Thank you very much for your input, I appreciate your advice. I have the following mesa cards: 5i25T + 7i77 in a fiber laser cutter still in development, 7i80hdt in a cnc router, 7i93 +7i33ta, this configuration was the first time used a mesa card Hurco km3p knee mill and the last one is the 7i96s. The thing is that each card is in a machine and the only one "available" is the 7i96s. I just wanted to see if I could use those cmc drivers in a new project, a plasma retrofit.

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24 Apr 2024 21:16 #299027 by tommylight
Mesa 7i96S + 7i85 + 7i83
That combo does step/dir. analog +-10V, encoders and SSerials, add a 7i84 if you need more IO.
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24 Apr 2024 21:34 #299029 by Ronniecnc
Great just need to add a THCAD2.

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