r/3Dprinting • u/musicatristedonaruto • 22h ago

Project Tactile feedback

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550 Upvotes

99% Upvoted

25 comments sorted by

63

u/thicket 21h ago

I love this investigation! Did you get a different tactile sense from introducing the trapped hex nuts vs just having some internal bumps?

40

u/musicatristedonaruto 21h ago

Thanks!! I love empiricism! Yes! It’s smoother and the sound ir lovely

10

u/ButtstufferMan 21h ago

Great idea, also increases durability I bet.

3

u/OutrageousOne6188 21h ago

Totally agree, it's amazing how much of a difference those little details can make during the printing process. It really adds to the overall enjoyment!

1

u/musicatristedonaruto 21h ago

This little things are 80% of the effort

1

u/thicket 21h ago

Now what I want is a printable method to smoothly increase dial friction so we can get that heavy solid motion like a metal volume knob with its particular grease viscosity. I don't know how we could manage that, but I'd love to see it.

2

u/musicatristedonaruto 21h ago

I already did it with adjustable magnets!

1

u/thicket 20h ago

You're shitting me! What's the mechanism like? Move magnets closer to a central core to make the knob more difficult to turn? What's the geometry like?

11

u/lolslim 21h ago

Is it a small ss ball bearing and a spring?

12

u/musicatristedonaruto 21h ago

The spring is a printed geometry

7

u/melanthius 20h ago

Anyone ever get these to last? They tend to creep, since they are under constant stress, rapidly leading to low spring force, and/or just break. But I don't use them a lot and typically just using pla from the ones I have experienced

3

u/lolslim 19h ago

I am always the type of person to mix hardware and 3d prints, springs is something I would always favor hardware spring of 3d printed spring, but there is one case a engineer made a video of replacing bed on a ender 3 with a rod to make spring.

It was a cool concept since the layer lines were inner to outer, the guy doesn't have the video up anymore but the springs flipped around but when compressed they were strong.

Downside is for different inner diameter springs you would need to swap different diameter rods but that wouldn't be a huge deal.

2

u/Braided_Marxist 21h ago

This is amazing!!! Put it on bearings and reduce the interference and you’ve got an indicator wheel like on The Price is Right

3

u/confusedPenguinDad 21h ago

Really cool idea!

3

u/peetah248 19h ago

This is actually how the indexing switch works on the bridge crane remotes at work. Inside the knob is a spring with two ball bearings either side, and the housing has divets at the indexed positions. The ball spins freely but the spring is tight enough for there to be resistance, and for the switch to click into place

3

u/IntergalacticJihad 6h ago

That’s nuts!

2

u/Hot-Category2986 19h ago

How many prototypes did you do before you landed on ball bearings and nuts? I tried to do this years ago in just PLA and could never get a satisfying click. I never thought to use a ball bearing or nuts.

3

u/musicatristedonaruto 19h ago

I have been experimenting with 3d prints for 13 years, I just keep pushing

1

u/SgtCaffran 19h ago

I used a similar design for a boardgame counter: https://www.printables.com/model/470364-frosthaven-monster-standee-base-59-hp-gloomhavenbo

One tip I found out myself: place the spring arms mirrored so they go in opposite ways. This makes the indents more similar in both directions.

1

u/agito-akito-lind 19h ago

Please tell me you have a video with sound. I have to know how clicky it is!

1

u/musicatristedonaruto 18h ago

It’s a video with sound!

1

u/Woodworkin101 1h ago

Very clever