Re: Opinions on $250 cnc machine

> I've
> been using easily replacable "snap-in" polyethylene nuts -no backlash
> on the only one I've had to use...It's just a 1" cube drilled &
> tapped.
>
> Before I get in any trouble let me say that I'm here to share
> and get experienced opinions on something I'm positive will
> benefit all. I haven't seen this stuff used and it should be.
>
> I built a disc finisher (polishing machine) 10 years ago out of it
> and have used it 15 hrs a week every since.
>
> My first lathe was cast on the end of an old blower motor.
> I made actual usable roller bearings out of the stuff.
>
> I,d like to make a sortof "snap-together" customizable
> cnc kit and I have.
>
> I do want my idea critiqued, critisized, and taken apart
> because the thing HAS to work.
>
> Thanks -John
>

One thing at a time.

you will deffinatly find a lot of people telling you it cannot work.
IIRC, John K. and his machines with all-thread cannot work. the
hundreds or so now running prove otherwise.

Disregard the doom-sayers and focus on what you know will work.

I am curious about the plastics. All the plastics I have seen in such
large sizes are expensive. How do you get by without the high costs ?

One can buy co8unter top at many local stores so that could be one
option. Melamine shelving can be layered to make a very thick
material, another option.

I would not foucus on the super strong base as there are sooo many
mancines with plywood or pressboard as the base that do work.

Besides, a simple frame, a bag of concrete and some water and the home
shop guy can make his own custom base, complete with Tee slots and
vauume holes and even embedded nuts.

Dave