On 12/5/22 12:05, Chris Albertson wrote:
I had only eyeballed the equations, not plugging in numbers and figured it
was a toss-up. Put you can always modify the tube and turn it into a
solid. Simply fill it with chopped carbon or glass fiber and epoxy paste,
pack it in and let it cure. I've made parts with before and they are very
stiff and strong. The random fiber orientation is not as bad as you might
think and even short chopped fiber still has 100+ length to diameter
ratio. The key is is mix in as much fiber was physically possible while
still getting it all to wet-out.
This is a quick way to make parts, faster and stronger than 3D printing.
Model makers have been doing this for decades. I was making small parts
for flat-water racing kayaks with fiber-filled resin and latex molds
So unless the tube needs to have light weight, just fill it and make it a
solid. Or use a larger aluminum part
In a 3d printer, light weight of the moving parts is very desirable.
That is a huge problem for the Y motor with any bed slinger, and it
still the first axis to lose home in the bed elevator designs because
they trade off the bed inertia but then have to throw the whole x
carriage maryann around, motor and all. Only the corexy designs fully
remove the motor weight from the equations, trading that win in for the
elasticity of the humongous belt runs it takes to do the corexy motions.
A tronxy, with a 400x400 bed just about uses up a 10 meter roll of
belting to replace both belts. I have room enough to use a 50x48x500
tube for this, unforch 25x23 is as big as I can find. It will have to do
& it is lighter than the 50mm OD would be.
Take care & stay well, Chris.
Cheers, Gene Heskett.
--
"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
Genes Web page <http://geneslinuxbox.net:6309/>
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