Re: [CAD_CAM_EDM_DRO] re: Room for everybody (still)

Hey,
I read this whole post too.

I just know that .006 turns to .012 on direction changes. When you try to
cut some really nice text into a nice sign blank and you end up with
"stepping" along all your edges in Z, you end up wishing you had something
more accurate.

The "thrill" of CNC does not seem to last as long when you profile around the
outside of a signblank and now find you need to sand for an hour just because
the vertical edges are not straight.

So, that's why I suggested spending a little more money up front on a better
screw and nut setup, rather than the hours you will spend either making a
nut, OR , sanding and filing your new sign into shape.

But, There are no laws ! You can use threaded rod if you'd Like !

Chris L

ballendo wrote:

> Bob,
>
> Thank you for this post. I think we're in agreement here? The post
> you are replying to(mine) is mostly about lo-res machines for other
> than metal. I DID read the entire thread, and saw the opening to
> welcome some lurkers into the light...
>
> Hope this helps.
>
> Ballendo
>
> --- In CAD_CAM_EDM_DRO@y..., "cncdxf" <cncdxf@a...> wrote:
> > Ballendo,
> > The original post was asking if threaded rod would
> > be ok for wood working. Then all kinds of answers came. It
> > is obvious to me only a few people read the posts. Making
> > a wooden sign using a machine that has threaded rod would
> > turn out the same product as a more expensive machine. The
> > proof is in the internet. There are two large sites devoted
> > to homemade machines. How many people have taken an anti-backlash
> > nut put it on standard threaded rod and measured the error. What
> > is it? There are alot of craft people out there that are jumping
> > into CNC. Their suff looks great even with a .006 error. Anybody
> who
> > is anybody in CNC started off building their own machine. John told
> > me he is getting swamped with orders. He has opened up the CNC door
> > for me and others. I was milling boards for a local company using
> one
> > of John's designs. The company just had a big layoff. So much for
> my
> > egg money. Go back and read the posts on threaded rod, then read the
> > orignal.
> >
> > Bob
> >
> >
> > --- In CAD_CAM_EDM_DRO@y..., "ballendo" <ballendo@y...> wrote:
> > > Bob,
> > >
> > > I applaud John K's minimalist approach... But,
> > >
> > > On this list people are "doing" cnc for many different reasons,
> and
> > > with VERY different needs and expectations.
> > >
> > > Some will be very happy just to have a machine that moves
> somewhat
> > > repeatably. Period. Others are wanting/needing to work to better
> > > than .001 accuracies.
> > >
> > > And this distinction IS NOT drawn between "amateur"
> > and "commercial"
> > > users! It depends on the parts needed. AND the material!
> > >
> > > One of the things that I find a little frustrating is that the
> > > majority of posts on this list seem to refer to CNC as used for
> > METAL
> > > working. And "tight" tolerances. CNC is applicable FAR
> > beyond "just"
> > > metal. Where are the woodworkwers? Where are the plastic workers?
> > The
> > > engravers? The pc bd makers?
> > >
> > > I think Chris Strattons recent post about cyclic
> > variations "ruining"
> > > his tubing mandrel? to be one of the more useful bits of info
> > shared
> > > recently. Something many wouldn't otherwise "think of"...
> > >
> > > We have seen the list recently become "re-aimed" at the home shop
> > > user. Okay. I hope that we will ALSO see some of those who work
> in
> > > that "home shop" with OTHER than metal, at all levels of accuracy
> > > needs, feeling free to speak up...
> > >
> > > Hope this helps.
> > >
> > > Ballendo
> > >
> > > P.S. What I'm saying is that there may be many who just don't
> speak
> > > up because they may feel that their 100 step/inch machine will
> > > not "measure up"... Or that a question about depositing glazes on
> > > tiles to be fired (with cnc) will find no answers...
> > >
> > >
> > > --- In CAD_CAM_EDM_DRO@y..., "cncdxf" <cncdxf@a...> wrote:
> > > > Hi Ballendo,
> > > > I suspect the people who had trouble with threaded
> > > > rod used a regular nut also. Tapping a piece of 1/2" Delrin to
> > > > run on the nut works great. I also suspect they used coarse
> > > > threaded rod. John K got me to use <snip>
>
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