Thread: CNC Lathe Build. Hopefully.
Right, after the reasonably successful mill build, I've decided that I need a CNC lathe. Nothing too big or clever - heh, in all honesty I'm struggling to think what I'd make with it, but no doubt it'll come in handy at some point.
The control electrics are pretty much sorted as I'll use my mill box to drive the steppers, so essentially I'm after building a couple of short linear stages (1605 ball-screws, 20mm profile rails), populating one of 'em with a tool-post and getting hold of a spindle/chuck - probably from a lathe manufacturers spares section (think Warco etc.) I've not even thought about thread cutting as yet, although it would be a very cool thing to be able to do...
Materials to turn: 6082 mostly, brass, steel perhaps. Small scale stuff.
I did start out thinking about a conversion until I saw this video the other day:
Excellent. Apart from the mind-blowingly ace turret, these are the lines along which I'm thinking.
Do-able? Any advice/links to other builds of interest?
All the best.
Nice looking machine and pretty simple design, apart from the turret you mention, although you would definitely have to include that. I did notice there is no tailstock, are you planning on fitting one ?
Would it be worth considering at this stage to allow adaption to a 4th axis cnc with router ?
Last edited by EddyCurrent; 15-10-2014 at 07:54 PM.Spelling mistakes are not intentional, I only seem to see them some time after I've posted
It's pretty cool, eh?
There are plans out there for that turret, although my efforts will be more along these lines:
Yes, I wondered about the tailstock. Bearing in mind this will be for small scale stuff, is it essential?
This might be worth a read.
Last edited by mekanik; 02-01-2015 at 12:50 PM.
Frankly I would start with one of the small Sieg lathes, also sold under other names, rather than try to make your own if you don't already have a lathe. But not too small. You get a reasonably accurate bed, spindle and slides as well as the motor drive. Backlash is not nearly so critical in a lathe so you can live with the normal feed screws though ballscrews are nice to have. It is easy to underestimate the rigidity you need for a lathe as well as the fit of the slides if you want to turn anything metal. Lathes are the essential machine tool.
The intention of my post was just to highlight the use of concrete as a solid base for construction not to construct the lathe shown. a couple of lengths of 25mm square steel bar and a small quantity of rebar and a simple box mould would give you a solid base on which to mount a couple of Hiwin Rails.
I have seen on superb gantry mill manufactured this way(sorry can't find the link) but this is something similar.
Last edited by mekanik; 03-01-2015 at 11:11 AM.
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