Confused about LinuxCNC and Fanuc Redcaps on a running machine

I'm not saying its impossible but its not trivial to do this.

Also there are many variants of Fanuc PWM drives, newer ones using high density I/O connectors (that include the encoder signal) and some with differential PWM signaling

This subject has come up often enough that I have considered making an interface but it is a fair sized project

Thanks.

It's certainly way over my head.

Meanwhile I'll put the machine up for sale, and use it until sold. While it's for sale, I'll look for a machine that is easier to move to 5-axis.

If an interface becomes available meanwhile, I'll take the machine off the market.