Re: CNC router build

1f. Re: CNC router build
Posted by: "Jon Elson" elson@... jmelson2
Date: Thu Apr 2, 2009 8:48 pm ((PDT))

Andrew Werby wrote:

> > [I've purchased some of those universal-type Precise spindles off Ebay, and all I can say is "buyer beware". Maybe I've just had bad luck, but the ones I've tried have all burned out in short order if they worked at all to start with.
> >
>

Depending on the model, they may need an external cooling blower. If
yours didn't have an integral blower, that's why it smoked.

[These did have the integral blower and filter, actually, but I guess nothing lives forever. Maybe an external blower would have helped, but I'm not sure how the plumbing would interface with the existing blower/filter assembly. I also bought a Precise water-cooled spindle (also on ebay) but it turned out that the pipes were clogged solid...]

> >
> >
> >
> > If size isn't a concern, there are Danly-Onsrud router motors, running
> > several Hp at 15000 RPM or so. These can be run from off-the-shelf VFD
> > units that will go to 400 Hz.
> >
> > Jon
> >
> > [Are these still being made? It seems like Danly sold out to Onsrud, who then sold themselves to ATS, which as far as I can tell is now a repair company only, not a manufacturer.]
> >
> >
>

My only experience was with one off eBay, it was a MONSTER, and I ended
up selling it at a loss on eBay later. No way could it be fit onto my
Bridgeport, as I had intended. The Precise spindle is a LOT smaller and
when I get around to making a 2-phase converter for it, I will make an
adaptor to bolt it to the side of my Bridgeport quill.


Jon

[I've still got a Precise 2-phase converter I never used from my days of collecting this stuff on ebay. I'll sell it to you if you want, but no guarantees...]

Andrew Werby
www.computersculpture.com