> I might have a go at building a CNC. I've got a pair of dead 
> HP Laserjet IIIs that I snaffled the main drive motors from. 
> Only problem is, the shaft isn't the standard "half round" 
> one you find on most motors - it looks like one continuous 
> worm gear. To date, I haven't found anything I could use to 
> mate it to a leadscrew.
> 
> That said, I still need to track down some leadscrews and 
> some metal rails. Copper or brass pipe might be an option, 
> but wouldn't be very resistant to damage (one dent and you 
> get to replace the rails sort of thing).


Try www.crankorgan.com for a few ideas.  Very cheap ideas!

Rails using chrome pipe (shower rails) or even gas pipe with rollerblade
wheels bearings.  MDF or plywood for the rest.

To attach your motors to leadscrews, use something like air hose with
some clamps.

Tony

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