2
$\begingroup$

I want to make a wheel that behaves pretty much like a mouse wheel does — when you rotate it with your finger and release, it rotates back or forward by itself to match a nearest discrete position.

What are the common ways to do so?

$\endgroup$
3
  • 3
    $\begingroup$ I think what you're asking about is a "detent" en.wikipedia.org/wiki/Detent: "a device used to mechanically resist or arrest the rotation of a wheel, axle, or spindle." $\endgroup$ – scanny Jan 4 '18 at 2:36
  • $\begingroup$ Detents are used in .. bicycle gear levers, the grind setting on my coffee bean grinder, the position in my windshield wiper speed setting knob, for a few examples. $\endgroup$ – Carl Witthoft Jan 4 '18 at 14:07
  • $\begingroup$ Possible duplicate: engineering.stackexchange.com/q/13208/2559 $\endgroup$ – GisMofx Jan 4 '18 at 16:51
1
$\begingroup$

One way to do this would be using permanent magnets arranged in a circle spaced out on a base plate with a central pivot point for a top plate (your said wheel) that has a ferrous disc mounted in it. Use the magnets with either pole facing up. As you rotate the wheel, the ferrous disc will be attracted to whichever magnet it is closest to, you can space the magnets to give you any detent pattern you like.

$\endgroup$
1
  • $\begingroup$ @Vadym: Your welcome. $\endgroup$ – William Hird Mar 12 '18 at 14:58
0
$\begingroup$

a stepper motor. they have discrete detents, furnish propulsion, are cheaply available in a variety of sizes, and easy to drive using arduino, raspberry pi, beaglebone, etc. and lots of user information regarding them exists in the robotics community.

$\endgroup$
3
  • $\begingroup$ Thanks, but it doesn't really look like a thing I'm trying to find. What I'm really looking for is a mechanical wheel that you rotate with your actual finger to drive some mechanical fanciness (like the aforementioned mouse wheel or a wheel with digits on some bike locks) and which self-adjusts to some discrete steps. $\endgroup$ – Vadym Borodin Jan 4 '18 at 3:26
  • $\begingroup$ got it, sorry. -NN $\endgroup$ – niels nielsen Jan 4 '18 at 5:12
  • $\begingroup$ A stepper motor actually gives a nice tactile feeling when rotating the axle with your fingers and stops at distinct steps. Try salvaging from an old printer or CD ROM or something. It works similar to William Hird's answer, though the resolution may be too fine $\endgroup$ – ChP Apr 6 '18 at 8:28
-1
$\begingroup$

Genova or Geneva mechanism is stepper mechanism, there are plenty of websites explaining Geneva mechanism or drive, like this wikipedia article Geneva drive

Geneva Drive Animation

$\endgroup$
6
  • 1
    $\begingroup$ Hi Katarina, please add details as answers that rely on links suffer when the linked items dies - been guilty of this myself ! $\endgroup$ – Solar Mike Jan 4 '18 at 8:58
  • $\begingroup$ @SolarMike it is well known mechanism he just needs to google it and he'll get nice 3D simulations and explanations. $\endgroup$ – Katarina Jan 4 '18 at 9:21
  • $\begingroup$ A picture and a short para would be great though and you may find people voting for it... $\endgroup$ – Solar Mike Jan 4 '18 at 9:58
  • $\begingroup$ And the winner with most votes wins free access to all answers on this site :) $\endgroup$ – Katarina Jan 4 '18 at 10:10
  • $\begingroup$ Katarina, the point of votes is to guide future readers to the most appropriate answers. We're just asking you to improve the quality of your correct response. $\endgroup$ – Carl Witthoft Jan 4 '18 at 14:06

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.