I just completed converting my Hammer A3-31 to a "CNC" controlled table. It cost about $300.00 and it is working great. I'm awaiting the arrival of more PLA for the 3D printer and will print a case for the control/screen and a belt guard once it arrives. Here are a couple photos of the setup.
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I programmed an generic Arduino Mega with a 3.5" TFT touchscreen shield to control a stepper motor. Here are a couple shots of the screens.
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When it is powered up, it automatically "homes" the table and then presents screens depending on your desired actions. It moves at 400 RPM, so it takes about 18 seconds for it to traverse the entire travel distance of the table. I programmed it to allow you to move to an absolute position or to step up or down a particular distance. It has error checking programmed to prevent moving out of range and taking to large of a cut.
I planed with it yesterday for the first time and it worked very well.
Thought others might like to see.
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