I Upgraded My 3D Printed Carbon Fiber Telescope

I wasn't quite satisfied with certain aspects of the mechanical design of my #3dprinted #carbonfiber telescope so I made them more better!
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#cad #solidworks #dobsonian #astronomy #space #telescope

[@carolynhudson6858]

I don't know much about telescope design, but i am a touch surprised over the use of a simple two gear system rather than something like a beefy planetary drive which usually have less backlash and are more compact. When I finally managed to get a 3d printer that can do multiple materials i also began experimenting with mixing materials in different ways to improve print quality. My favorite successes so far have been mixing polycarbonate and PC-CF such that I have smooth contact, aesthetic, and no conductivity areas on individual parts. I have also found that mixing with a CF filament can allow printing of large parts (I'm talking parts that barely fit on a 350mm bed) that would normally warp right off the bed while mostly still having the non CF look. Another favorite was to make a replacement belt pulley on a expensive tool whose pulley had melted from motor heat I was able to print a CF-PA6 core with thick spokes that doubled as a sort of fan for the motor and smooth natural nylon in the contact area of the pulley keeping the pulley's overhang smooth by using a zero distance breakaway filament I just wish Nylon wasn't such a hydroscopic filament. Ever since i have seen some videos of how CF infused filaments can be unhealthy to sand without protection I have been worried about using it in any contact area and have remade parts to minimize this. That said super cool...

[@agentpresta]

I like your smart, simple solution to unload the gears by adding the rim. Are you able to tell if that improved the smoothness of operation?

[@designbydave]

It's a bit smoother, yes. The biggest difference is the seamless transition where the gears are bonded together. The previous design was plenty smooth, this is just overall a better mechanical solution.

[@CallmeSam00]

Damn this is cool

[@designbydave]

Thanks, I think so too!

[@MazzifLOL]

Sic design!

[@designbydave]

You the man Mazzif

[@BertNielson]

Beautiful design. What's estimated BOM?

[@designbydave]

Thank you. I spent around $2000 for the initial build. The "V2" parts, an additional ~$300

[@gallogollo1141]

What is up muchacho. This is just a vague thought I have. 99% of the things I want to do I never do. But you think spur gear design on 1/4 inch aluminum would work. I would assume it does right? I am not an engineer nor anything although i whish I was. I just do technical drawings to be cut on water jets. I have access to aluminum and the previous mention water jets. And I would assume the telescope can be achieve by just water jetting the parts and welding them right? no? maybe?

[@designbydave]

Hey brother. Waterjet cut spur gears could work but they do have some limitations. Spur gears will inherently have backlash, whereas these herringbone gears do not. Having said that there is also considerable backlash in the planetary gearboxes on my stepper motors.
Welding always causes warping so I would avoid welding as much as possible.
But, overall, yeah, you could probably pull something off with waterjet cut aluminum parts.

[@Scott_By_Scott]

Cat Challenge!

[@ivanakarain12345]

Cat challenge :P
Cool video and cool design tho!

[@designbydave]

Thanks!

[@SpeedRunningStartups]

This is the perfect use for 3-D printing. Combining it with non-3-D printed parts, that is really the only useful thing to do a 3-D printing.

[@designbydave]

Thanks!

[@Scott_By_Scott]

DP420 is my other username

[@designbydave]

OF link?

[@aagifford]

Silicone paper!

[@designbydave]

Oh that sounds like something I need to look into!