Re: Speaking of VFDs

--- In CAD_CAM_EDM_DRO@y..., "Tim Goldstein" <timg@k...> wrote:

> My application is a little unusual. Ideally I want 4000 - 4500 rpm

and need

> the full support of the spindle to eliminate any vibration, but

there is

> virtually no cutter load what so ever on the bearings. I am using a

6"

> diameter .0625" 160 slotting saw blade to cut 5 lb/cu ft density

balsa wood

> at 30 ipm. Figure blue styrofoam is 2 lb/cu ft and pine is about 25

lb/cu

> ft. I need the rigidity of the spindle to eliminate any flutter in

the

> blade. Long story, bit if you want to see a little more about what

I do with

> the wood take a look at my website http://www.IndoorDuration.com
>
> I will keep any eye on e-bay for a speed spindle as that would be

handy for

> other tasks, but probably not the right solution for this one.
>
> Thanks,

Tim

I've posted a drawing in the files section called High Speed Spindle.
I don't have a photo as I sold this machine a while ago but the
drawing still exists. This is a spindle I made for my Mill/Drill do
do engraving. Drawing is pretty self explanitary. This one is for a
samll 1/4 engraving cutter but the design can be altered to suit any
application. I finished up running the cutter at about 18,000 rpm
with no problems.
Hope this helps.

John S.