On Wed, Mar 23, 2011 at 12:49 AM, gene heskett <[email protected]> wrote:

> On Wednesday, March 23, 2011 12:35:24 AM Igor Chudov did opine:
>
> > On Tue, Mar 22, 2011 at 10:28 PM, gene heskett <[email protected]>
> wrote:
> > > Anyway, <http://gene.homelinux.net:85/gene/emc>
> > > new toy is left pix in next to the last row.
> >
> > Looks awesome. I still have not completed my high speed spindle.
>
> I put a slightly used Bosch solid carbide 1/4" upcut spiral bit in it to
> play with this evening, and swept it back & forth over the end of a short
> stick of white ash, a moderately hard and dense wood.  If I only advance it
> about 1/4 of the diameter, the finish is so smooth I could plate it & use
> it for a mirror.  Absolutely no tear out at the edges of the cut, it will
> do great for carving tenons in woodworking.
>
> I mounted a half inch router bit in my HF grinder and used it to face the
sacraficial board on my table.  It powered through it nicely.

I currently run my HF spindle using a 1/8" endmill 30-90 ipm at 0.1" passes.


> I will fault the on-off switch though, that puppy is stiff & not near
> enough of a finger purchase to slide it, I hope it breaks in before it
> breaks.
>
> The switch is not one of the better points of this tool.  I bought a dual
relay board and one day I will hook it up to avoid having to fuss with the
switch.


> No idea if its a PM field or plane universal motor, but I suspect the
> latter.  If it was a PM field, I'd hook the mills speed controller to it,
> but that would need a 5 amp fuse then, currently the mills own motor is a 2
> amp fuse limit.
>

I would be interested in donating my spare HF grinder for experimentation if
you want to try and figure this out.

>
> But at 25k rpms, I'd ought to be able to carve at 15-20 ipm as long as its
> a climb cut.  Pretty fast for that toy mill.
>
>  I have also run 1/4 inch up spiral endills at .75" in MDF due to improper
gcoding on my part.  Amazingly it powered through that at 20 ipm.  I would
not recommend that too often.

Thanks for sharing your photos.  I would love to spend more time on my
projects too, but traveling to St. louis keeps me locked up in hotels
instead.


> I was going to buy a Grizzly G0704, but it has disappeared from their web
> page just this past week.  For a kilobuck, that was a heck of a good buy.
>
> --
> Cheers, Gene
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> <http://tinyurl.com/ddg5bz>
> <http://www.cantrip.org/gatto.html>
> The two oldest professions in the world have been ruined by amateurs.
>                -- G.B. Shaw
>
>
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