Re: Threaded Rod WORKS!

Hi Ballendo,
I suspect the people who had trouble with threaded
rod used a regular nut also. Tapping a piece of 1/2" Delran to
run on the nut works great. I also suspect they used course
threaded rod. John K got me to use 1/4-20 rod. I went over the
other day to see the 7th Sojourn. He designed a machine for people
to use to cut out their wooden model airplane parts. He took his
designs to the max while keeping it simple. He built a complete
CNC machine for under $200. He is working on a simple indexer and
other incredible things. He makes most of his parts with hand tools.


Bob

--- In CAD_CAM_EDM_DRO@y..., "ballendo" <ballendo@y...> wrote:
> Bob,
>
> Excellent post.
>
> I've mentioned before that the single fastest way to frustration is
> to over-spec your needs out of ignorance. It's like thinking a
fancy
> tennis racquet will make you play like Sampras, or a new set of
clubs
> will make you shoot like Tiger...
>
> Jobshops for years have been offering +/- .005" on location as std.
> tolerance; yet we see newbies who expect their little aluminum bolt
> together will be capable of holding .0001 (usually because they
think
> resolution IS accuracy).
>
> Build what you can. Accept what it can do. Use it to make something
> better. This process of iterative incremental approximation works!
> For square roots to machines...
>
> Hope this helps.
>
> Ballendo
>
> --- In CAD_CAM_EDM_DRO@y..., "cncdxf" <cncdxf@a...> wrote:
> > Chris,
> > What if the person has a 6" X 6" cutting area and the
> > threaded rod is off by .005 or more over that distance. The
> > machine will still be a learning tool and it can turn out great
> > parts for RC cars and planes. Have you ever measured a handmade
> > part. Looks great-works great but don't mic it out. I have
> > been following lots of peoples progress. I see them selling
> > their stuff off on Ebay after getting frustrated. To learn CNC you
> > need a machine. After getting your feet wet you can then buy
> > some expensive leadscrews. My guess is that at that point you
> > will build a second machine using what you learned or buy one!
> >
> > Bob