3D Printing with Nylon: Robot applications?

[AdamHeard]

Originally Posted by EricH

330 used SLS-built nylon mecanum wheels on a testbed a few years back, courtesy of a sponsor. Admittedly a different process to build, but the wheels held up under hard driving on a concrete floor.

8 years ago! "A few"....

[protoserge]

Have you looked into the Taulman 645 or a polycarbonate filament? The specs for both look pretty impressive. I pledged for an OpenBeam Kossel Pro (delta arm printer) on Kickstarter and plan on making some robot parts this year for the team.

[seg9585]

Originally Posted by stinglikeabee

Have you looked into the Taulman 645 or a polycarbonate filament? The specs for both look pretty impressive. I pledged for an OpenBeam Kossel Pro (delta arm printer) on Kickstarter and plan on making some robot parts this year for the team.

Polycarbonate!! I did not know that was available. Can't wait to make my first lexan print

[protoserge]

Originally Posted by seg9585

Polycarbonate!! I did not know that was available. Can't wait to make my first lexan print

Just remember you need at least 265°C to extrude it. I've seen claims in the 285-300°C range as well. It is also hygroscopic, so you want to be careful that the filament is dry enough to extrude properly.

https://ultimachine.com/content/poly...lear-1kg-spool
http://reprap.org/wiki/Polycarbonate

I'll be testing it for sure once I get my printer(s) up and running

[JesseK]

I'm building a Prusa I3 as part of a 'camp' this week, and a couple of other robotics teams in the area are here as well. It has a heated bed (long copper PCB print) and is fairly straightforward to put together (so far...).

My first big project this year is to create an inexpensive prosthetic hand fit for someone specific. Once I feel confident I can make one at a decent quality, I'll seek someone out.

After that, it'll be on to Tri-/Quad-/Hex- & "other" -rotor parts.

For FRC

• The plan is to print near-solid low-loaded gears out of ABS, similar to how the FP gearboxes have them
• It may be possible to also do shaft adapters (light loading, of course) out of ABS -- similar to how the Simbots have done them in the past (1 solid part for multiple attachments)
• Another use could be precision sliders for a belt or chain tension system (3 or 4 slots that keep the entire slide aligned properly)
• For Nylon applications, depending on the specific material, you may be able to make custom-formed linear slides
• And of course, the all-important (and often underrated) custom circuit or sensor mount
• If there's ever a use for a RS-395 motor, ABS should be plenty strong enough to reliably hold the motor up without sagging over time (i.e. it will still work at your demos 8 months after build) -- so a custom gearbox where the output shaft isn't cantilevered (again, depends on loading) is more feasible here than with a heavier motor
• Same with the VEX motors -- it's a lightweight motor, so the cantilevered mounting of it shouldn't be an issue over time
• The ultimate 3D printed item for me, used in FRC, would be the light-load linear actuator that's driven by a legal motor and provides mounts for 2 limit switches that are in precise positions. Given that I have other plans, perhaps someone else at the 'camp' will design one.