Retro Reproduction.

Jon Elson elson at
Sat Oct 24 20:57:23 CDT 2015

On 10/24/2015 08:01 PM, geneb wrote:
> I wouldn't mind finding step-by-step instructions on how 
> to refit a 2000 model year MaxNC 10 open loop mill.  The 
> controller it has now is parallel port based and the 
> control software is DOS only.
Well, this is a stepper-driven machine?  Are the stepper 
drives in good condition, and are they good units?
Stepper drives have come a long way since 2000.  Gecko 
stepper drives are pretty amazing.

You can run stepper drivers from the parallel port, but the 
performance may be less that optimum.  I make a board that 
generates steps in hardware that gives more accurate step 
timing at higher speeds, and also allows closed-loop 
operation if you fit encoders to the machine.  This is all 
supported by the LinuxCNC program, which is pretty 
fantastic.  I use it here in my shop to run a Bridgeport 
mill with my own servo drives.  I also have a desktop mill 
that I built mostly for taking to shows that uses my 
controllers and drives.

You can check out the web site, and see what 
others are doing in the retrofit area.


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