Re: why so few cnc lathe conversions?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "jlsmith269"
<jlsmith269@y...> wrote:

> I am wondering why there are so few lathe conversions vs mills?

Most folks do a mill because they are simply more popular.

>
> I bought a frejoth 13x37 gearhead, with crashed threading gears...

the

> machine MIGHT have had 10 hours on it, before it was crashed.
>
> My plan it to stick some 360oz/in on the x, y, and y, and drive

this

> thing as a super tight lathe.

You'll need to gear them down, mostly the Z.

more than likely you'll do better with a stepper (bigger the better)
for the Z a reduced servo for the X




The runout of the headstock is very

> small, and I think I can do this for

>
> 3x360 motors with encoders(250) Your price is a little low (Guess

$500 at least), unless you're buying some seriously questionable
motors.

> xxx? drive (200) Geckos are $115 each you'll need at least 2
> power supply , pc based? 50 PC supplies aren't designed for this

and will give poor performance at best, mostly motors this size.
(guess $250)

> cables and wiring, 200? and nema enclosure(s) and other small

stuff about $300 total maybe less with a used PC case.


Ball screw and preloaded nuts $500 (if you're gonna do it, do it
right)

> 700 bucks, before gearing?

I'm at $1780 so far and counting

> Speaking of gearing, do you guys make your own gear drives or buy
> them? If buy them, where?

I make and sell the gear drives (universal servo drive will cover a
lathe of this size)


And a big stepper with direct drive for the Z.


Not to burst your bubble, sorry.

Just so you know CNC stands for Cash Not Credit.

Thanks
Aaron Moss
www.IndustrialHobbies.com