On 4/12/24 18:45, John Dammeyer wrote:
Hi Gene,
I should knock john D's problem up in openscad, might yet if he ever
gives us the whole spec so I know what he's trying to do. To me it only
needs 3 axis's as long as one is rotary. Those fast A & B's I have built
have been handier than sliced bread. Speeds up to around 500 rpm, plenty
accurate enough for what we do. Chucks on them are printed to do one
job, hold a square stick of hard maple on center.
Not so much my problem as a friend was asking about doing it. I really didn't
see the need for a rotary table but if a mill has a lot of backlash or just
isn't super big then spirals can be difficult. Hence his idea of using the
rotary table.
Not so sure how well this photo will come through but this is what he turned
out.
For me the problem wasn't duplicating the concept in CAD but how the CAM
modules created decent G-Code. I think I'll try setting up a copy of my system
with the rotary axis as 'C' just to see what happens.
I try to learn something new every day
.
I see now. That looks like a scroll for a 3 jawed chuck, a much tighter
twist than I had envisioned as I was imagining a turbocharger wheel in
my mind. For this, Z feed here is only for DOC. And it looks as if you
did well! Congratulations are in order!
What mill is that? The post cover looks a lot like my go704.
John
Cheers, Gene Heskett, CET.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
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