I've had the opportunity to be on the Beta test team for Acorn. I wanted to show my two machines that were used for testing Acorn.
This one is a Dyna Myte DM2400. It was previously contolled from a Windows XP machine, driving a Gecko G540 4 axis stepper driver through the parallel port. When installing Acorn, I unplugged the DB25 cable from the parallel port and plugged it into Acorn's DB25 port. Of course I had to acquire a PC running Windows 10, following the CPU requirements. CENTROID CNC control CNC PC Performance requirements In my case, I used a Lenovo M92p Tiny PC, it has a 2.9ghz Intel i5 CPU, 4GB of memory, 128GB Solid State hard drive. This particular machine has the wifi option which came in handy for remote assistance using TeamViewer

I had to add a KB Electronics SI-5 to my KBIC 120 DC control board. The SI-5 is a signal isolator. It accepts the Acorn 0-10VDC analog output for spindle speed. I also had to wire the SI-5 directly to the ACORN's Analog output.

Here is an overview an explanation video:
https://youtu.be/jWTMriBlB6Q

This one shows it cutting a part. Now after the fact, I should have belted the spindle motor down to at least 1:1 but, camera was rolling and I didn't want to setup to cut another part, so I just used the Virtual Control Panel (VCP) to slow down the feed rate.
https://youtu.be/MvotXh04oZc

Forgive the rookie behind the camera!