As a long time supporter of Taig mills and lathes I should be able to off quite a bit of support. I started out with a CNC Taig Mill in the early nineties. At that time there were very few options for software and hardware to support DIY CNC.
The Taig Mill came with its own CNC controller, the MPS2000 and its own DOS based control software. It all worked very well, although the software was fairly limited.
There was some free software available called TurboCNC, which I quickly swapped over to it and it certainly added a lot more capability and flexibility. It was still running on DOS which was a bit of a pain, although you could boot the Windows 95 , or 98 in DOS mode.
Then there was this software called Master5. It ran under windows, looked pretty but was only capable of generating 8k steps/sec. With the Taig 20 tpi leadscrews and 200 steps/sec motors with the Taig 1/2 step controller, it worked out as a max speed of 60 inches/minute. This was just about right for the Taig so i was keen to give it a try.
The problem with Master5 was that it could only generate step/dir signals, whereas the Taig controller required phase drive signals. So, it appeared that I was stumped. That's when I designed and developed the TurboTaig board. It does a lot of things, but its main purpose is to convert step/dir signals into phase drive signals for the Taig controller.http://www.homanndesigns.com/store/index.php?main_page=product_info&cPath=9&products_id=16
I ended up selling an awful lot of these boards as word got out about Master5 and the TurboTaig board. Master 5 turned into Mach1, that progressed to Mach2, and we now have Mach3. As for the controllers for the Taig mill, Xylotex was very popular when the Allegro A3955 chip was released. Now the Geckodrive G540 appears to be the benchmark. It's an awfully good 4 axis drive that really has no rivals.http://www.homanndesigns.com/store/index.php?main_page=product_info&cPath=24&products_id=80
As for the TurboTaig board, I don't sell them any more as there is no real need. In fact, I gave the last one away quite recently.