Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME

>
>
>The main problem will be that your leadscrew is of very low precision
>and will probably vary from thread to thread with respect to
>dimensions as well as finish. a rough finish is a killer to any nuts
>you may use. And these are often chromed to provide some sort of nice
>look. Flaked chrome will also kill any nuts.
>

Mine are basic oiled steel, so there's no chrome to flake off. I'm
probably going to end up replacing them, but there are a few options I
can try, first.

I think I'll start by casting a tighter nut, using JBWeld. It seems to
have many of the same properties as Moglice, but it's easily available
around here. We'll see how that works.

>In my opinion, this is a neat start to a fun project.
>

Finally, someone else who views it the same way I do! Yes, I could have
just bought a better quality unit, but where's the fun in that?! ;-)
(Besides, for me it's all about budget, and this unit costs just a
little more than a trip to the movies, and less than Starbuck's coffee
for a week.)

>Bottom line is that your X/Y is a great start for someone learning
>how the add CNC, and who doesn't require high precision....
>

Define high precision, please. I'm hoping for at least .01", though I'd
like .001" or better if I could get it. I'm not trying to make super
precision parts here...just to enjoy myself, and build incrementally
better tools with each iteration.

>or for someone who wants to try their hand at scraping without
>starting on a high dollar machine.....
>

Contact me off list, about this, if you would...

>as a frame to which things like thrust bearings and short lengths of
>higher quality ACME are added.
>

Precisely...Fun! So, anyone got any short offcuts of ACME threaded rod,
just lying around? :-)

-- Chuck Knight