I have a 5 axis router with 2 Y drives, and up till now I've just had the 2 drives running off the same pins on the breakout board.  I'm finding that I"m having issues with squaring the gantry, and I want to be able to home both Y drives independently.  So, I need a breakout board that can handle 6 drives, plus VFD for my spindle.  I have not been able to find a board that can do this.  I'm currently using this board with a UC100 motion controller:

https://www.amazon.com/Breakout-optical-coupler-Stepper-Driver/dp/B00WN4T23W/ref=sr_1_3?keywords=5+axis+breakout+board&qid=1568658171&s=gateway&sr=8-3

I've found plenty of boards that advertise 6 axis, but they never have VFD capabilities from what I've seen.  I recognize I might need multiple boards to make it work, and if anyone could point me in the right direction as to how to do that, I would really appreciate it.

Hi,
a UC100 has one port as an output, so a maximum of 12 output pins and 5 input pins.

With six axes, each requiring 2 output signals (step and direction) and one output signal for a the PWM VFD control
that 13 outputs and therefore exceeds the capacity of the UC100.

You will need a motion controller that has more than one port, for instance an Ethernet SmoothStepper (51 IOs)
or a UC300 (85 IOs). You will need a second breakout board, I would suggest a C10 ($23.00) as it is bi-directional.
Thus you could have the second port arranged as pins 2-9 as inputs for 4 outputs and 13 inputs.
The total for both ports (port 1 the usual pins 2-9 as outputs, port 2 pins 2-9 as inputs) is 16 outputs and 18 inputs.

That would be enough outputs for six axes and several outputs for a VFD.

Craig

Pokeys57cnc