Re: Linear rail & ball screw size suggestions

I bought one of the Harbor Freight trim routers $20.00 and a variable
speed for it $10.00 just to play.

I haven't done any real work with it, but my set up is designed so
when it fails I can put in something heavier, another trim router
style.

So if you go with one of the cheap plastic things, just keep in mind
that you should leave room for a real tool later on when you need it
and not have to rebuild half your setup.

Dave

--- In CAD_CAM_EDM_DRO@y..., CL <datac@l...> wrote:
> I personally have not been impressed with the Roto-Zip tool for any
CNC application. I never bought one but the boss did at work. He
picked up the variable speed model. It wasn't a week (and with
> really no useage) that someone twisted the collet lock out of the
thing. It sat around until I yanked it apart and found that short of
some plastic, nothing keeps this thing from breaking. The good
> thing is once the built in lock is removed, you can shove any pin
in thru a hole to manually lock the shaft from turning.
>
> The bearings are probably as good as any, but the structure around
it would not be much for any CNC application.
>
> The variable speed part annoyingly ALWAYS starts on high and you
have to bring it back down.
>
> It's overall quality likely makes it a fabulous candidate for
zipping holes in drywall and some "craft" work.... its original
purpose. This one just sits in the box as no one uses it for anything
> anymore.
>
> CL
>
> Mark Taft wrote:
>
> > Talking about the Rota-zip,
> > How good are its bearings, being a diy tool I wonder if it is up
tot eh job,
> > or has it a good set of bearings ?
> >
> > Regards
> >
> > Mark
> >
> > -----Original Message-----
> > From: J.Critchfield [mailto:js3mc@a...]
> > Sent: 10 April 2002 02:36
> > To: CAD_CAM_EDM_DRO@y...
> > Subject: [CAD_CAM_EDM_DRO] Linear rail & ball screw size
suggestions
> >
> > I'm looking for some help on sizing the linear rails for a small
gantry
> > router. I have the Data-Cut plans and I will emulate much of what
is there
> > but I need to size the rails and ball screws before I can
continue. The
> > usable table area will be 12" x 18" and will be used to route up
to 4mm
> > graphite plate and G10. I have not chosen a router yet but I am
looking at
> > the Roto-Zip or similar cut-out tool with 1/8" collets. My
tolerence
> > requirement is +- .001" or better.
> >
> > Thanks,
> >
> > Jay
> >
> > Addresses:
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it if you have trouble.
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> >
> > http://groups.yahoo.com/group/jobshophomeshop I consider this
as a sister site to the CCED group, as many of the same memembers are
there, for OT subjects, that are not allowed on the CCED list.
> >
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