3DPrinting

15541 readers

240 users here now

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.

The r/functionalprint community is now located at: [email protected] or [email protected]

There are CAD communities available at: [email protected] or [email protected]

Rules

No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
Be respectful, especially when disagreeing. Everyone should feel welcome here.
No porn (NSFW prints are acceptable but must be marked NSFW)
No Ads / Spamming / Guerrilla Marketing
Do not create links to reddit
If you see an issue please flag it
No guns
No injury gore posts

If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is ![](URL)

Moderation policy: Light, mostly invisible

founded 1 year ago

MODERATORS

[email protected]

393

I'm working on a mechanical seven segment display (lemmy.world)

submitted 8 months ago by [email protected] to c/[email protected]

21 comments fedilink hide all child comments

top 21 comments

sorted by: hot top controversial new old

[–] [email protected] 3 points 8 months ago

This project is now on Printables!

[–] [email protected] 6 points 8 months ago* (last edited 8 months ago) (3 children)

Just yesterday youtube showed me this video and I thought to myself what a waste it is to use 30 servos for a project like this:

https://youtu.be/YQLStT4RXVo?si=wXzEu28u1hp5dKQr

Your solution is so much cooler.

[–] [email protected] 5 points 8 months ago

This video was the inspiration for my project!

[–] [email protected] 3 points 8 months ago* (last edited 8 months ago) (1 children)

Yep. I thought of this video as well!

This is a much better engineering solution. Only requires 4 motors.

[–] [email protected] 3 points 8 months ago* (last edited 8 months ago) (2 children)

I'm testing a geneva drive (you can see it in the front in the photo), that should allow me to reduce the number of motors even further. I think I can get it down to two, maybe even one.

[–] [email protected] 0 points 8 months ago

Wow, never occurred to me before, but this is such an elegant, and simple solution.

[–] [email protected] 1 points 8 months ago (1 children)

Oh that gearbox on the left?? I was just thinking that you could setup some gears similar to a analog clock to use only one motor. Does the geneva drive support snapping into position? With analog you'd want smooth motion, but here you'd want stepped positions. The snap is what makes this build so satisfying to me.

[–] [email protected] 5 points 8 months ago (2 children)

There is no snapping, but the geneva drive will stay locked in position when it is not moving. The thing that I haven't figured out is how to get the 3 to go back to 0 after 23:59, it needs to skip the numbers 4 to 9.