3DPrinting

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3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

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How to Mechatronics – RC Tank build w/2spd gearbox & printed tread (38:19) (i.ytimg.com)

submitted 2 weeks ago by j4k3 to c/3dprinting

9 comments fedilink hide all child comments

It is a well explained and documented build with a nice synchronized 895 based idler shaft type gearbox subassembly.

Be forewarned, this is a visual example, but is not open source. The files and code are posted on cults 3d for $20. This is not an endorsement. The project does not appear to be an On Shape subscription bait scam, but I have no affiliation, have not purchased, and have no way of knowing what is included behind the pay wall.

Personally, the visual example is all I need and could easily reproduce this in FreeCAD. This build is hardware intensive in the M3/M4/bearings sense but still budget standard. They are using 2mm aluminum welding rod for the track pins. The microcontroller is the Arduino Mega2560 with cheap motor driver modules, battery, RC control scheme, servo for the gear shifter, and some RC car dampers.

https://www.youtube.com/watch?v=OOjda40t6Ng

https://howtomechatronics.com/projects/making-a-beast-of-a-3d-printed-rc-tank-with-dual-speed-gearbox/

top 9 comments

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[–] [email protected] 9 points 2 weeks ago (1 children)

Hate thumbnails like this. “Fully 3D printed” needs an asterisk (*apart from all the parts that aren’t).

I realize this is on the creator and not OP, I’m just sick of things being labeled as “100% 3D printed” when they aren’t.

[–] [email protected] 4 points 2 weeks ago

What, you can't print LEDs and motors?

[–] Idreamofcheesy 8 points 2 weeks ago (1 children)

I'm fine with creators wetting their beaks when they put a lot of work into something.

Do they have a costed BoM for this? I'd hate to drop 20 bucks just to learn I need to drop another 200 bucks.

[–] j4k3 3 points 2 weeks ago

I didn't see one, but I didn't look very hard. It wasn't in the video when I watched. I'd say $200 is probably way low. That much hardware, bearings, ardy, modules, a few spools, RC controller, wires, connectors, a shield, components, lights, motors, servo... Probably falls somewhere around the $500-$800 range, if you try to buy them all at once and not the piecemeal and partial collections most of us have already. In all likelihood most of us will need at least half that spend to get everything needed. If one did this with Adafruit, McMasters, a US board house, and high quality filament, it could easily top $1k.

[–] [email protected] 4 points 2 weeks ago (1 children)

what if we put like the top of a pistol and and fed it bullets like it's a cannon

[–] j4k3 2 points 2 weeks ago (1 children)

It is not sturdy enough as a firing platform. You might pull off some shooting with a .22 or a bb gun, but those are a nuisance more than anything else. The recoil from something like a 9mm would wreck this and send it flying. It could deliver a payload, but so can you at that point.

[–] LowtierComputer 4 points 2 weeks ago

Plenty of people and animals have been killed with .22lr .

Please don't spread nonsense about it being a "nuisance."

[–] [email protected] 3 points 2 weeks ago

Very nice. Maybe when I have some time...

[–] [email protected] 2 points 2 weeks ago

If you do remake the model in FreeCAD I'd love to see that!