Re: [CAD_CAM_EDM_DRO] Re: greetings

Ray, thanks for the information. I got a question. Whats an ACME THREAD and where can I look at one.
Maybe I dont want ball screws but I would like to reduce the backlask on the mill.


Thanks Dan









Ray wrote:

>
>
> > Message: 22
> > Date: Sun, 17 Sep 2000 00:24:31 -0500
> > From: Dan Dowell <dandowell@...>
> >
> > This is my first post on this group. Im really new at machining. I hope I get something out of this. I have a 7x10 mini lathe and a grizzly mini mill.
> > I would like to at least put some ball screws and dro's on the mill.
> > Is there any one on this list who has a Grizzly mini mill or the equivilent who has made these modifications to their mill???
> > I think that CNC stuff is a little over my head right now. But I would like to figure out the others.
>
> Dan
>
> Dan Falck and I have been working on a "kit" to run ball screws on the
> 8689 Grizzly. We should have mounts and screws complete in a couple of
> weeks.
>
> IMHO - You don't want to run ball screws with manual milling because the
> table will run away if you take your hands off the cranks. The acme
> threads have enough resistance to cutting forces transfered to the bed
> that they will not run away but the ball screws do not! You can tighten
> the brakes some here but that's risky.
>
> If what you want is dro, I'd suggest linear scales, rack and pinion, or a
> wire driven encoder, and one of the computer dro systems talked about on
> the list.
>
> Ray
>
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