Fanuc servo drive integration

You have just described my thinking.

I envision a fairly large 'sheild' card for a SOM card that has sufficient GPIOs to cover the functionality of a FANUC 18, with the same form factor as the FANUC board and the same Honda connectors and etc.

I don't think anyone has looked at the FANUC spindle drive yet? It has a different interface than the kinematic servos. Also the FANUC I/O module protocol would need to be reverse engineered.

Quite a piece of work, but that is the (pipe) dream. MANOLOMARAVILLAS comment to this thread gave me hope that others might document concrete progress on the FANUC front.

I would need to get more spares to be able to contribute at this time. The FANUC machine I have is running good, but it is limited by its motion controller to 3 axis and is quite weak at HSM. (not deep enough look-ahead)

MANOLOMARAVILLAS please come back and tell us what you are doing.

Has any development gone into this?

I would love to know which mesa cards to use for pwm. Andy, you mentioned about a fpga card to use. What would you suggest? Will something like a 7i80DB work? together with a 7i75? I suppose I will need 30 I/O for a 5 axis machine with pwm. so my configuration for this machine can be as follows:
7i80DB => J2 => 7i75 => PWM
=> J3 => 7i75 => PWM
=> J4 => 7i77 => 7i84(SS)
=> J5 => 7i77 => 7i84(SS)

Would this hardware configuration work for the PWM red cap Fanuc servo drives?
Just to recap: I confirmed each drive has 6 PWM channels, 3-CW, 3-CCW. I need to drive 5 Axis on this machine.

Diederik wrote: Just to recap: I confirmed each drive has 6 PWM channels, 3-CW, 3-CCW. I need to drive 5 Axis on this machine.

Can you elaborate on how that works? like, what do the pwm amplitudes need to do, in response to the commutation signals?

At the moment I am just confused. I can't even imagine how separate PWM signals for FWD and REV would work.

Hi Andy,

I Apologise. I had to translate from afrikaans, so I think I misunderstood my friend.
His answer was 3PWM+, 3PWM-
So also after looking at your attachment, I think it's supposed to be as follows:
phase-A
phase-B
phase-C
phase-A-inverted
phase-B-inverted
phase-C-inverted
Will this be my connections?
Sorry... I think I misunderstood the first time.

That makes _so_ much more sense.

Basically that is the direct-drive signals for each element in the 3-phase bridge:

en.wikipedia.org/wiki/Power_inverter#Three-phase_inverters

The Mesa 3-phase PWM can drive those, and the HAL "bldc" component can interpret the 4-line commutation signal to drive the Mesa 3-phase PWM.

So, all you really need to join-the-dots is a Mesa firmware with all 6 PWM outputs.

Thank you Andy.

Will my configuration as follows be sufficient?

I would love to know which mesa cards to use for pwm. Andy, you mentioned about a fpga card to use. What would you suggest? Will something like a 7i80DB work? together with a 7i75? I suppose I will need 30 I/O for a 5 axis machine with pwm. so my configuration for this machine can be as follows:
7i80DB => J2 => 7i75 => PWM
=> J3 => 7i75 => PWM
=> J4 => 7i77 => 7i84(SS)
=> J5 => 7i77 => 7i84(SS)