Robotics Stack Exchange
Robotics Stack Exchange

Questions tagged [mechanism]

A mechanism is a device designed to transform input forces and movement into a desired set of output forces and the movement.

A mechanism is a device designed to transform input forces and movement into a desired set of output forces and the movement.

134 questions
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Education sources for robot building?

I teach FTC robotics to high school students, and while I'm a proficient programmer and can teach them coding fairly well, my mechanical skills are a bit soft. I'm looking for good sources for myself and the students to go through that gets a…
FTC Coach
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Plastic shaft supports

I would like to prevent a shaft from being pulled through it's bearings - that is, press a plastic ring around it on either side. What are these rings called? They're not bearings or hubs. And where can I find them?
SRobertJames
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Fastening sheet steel on nylon

I'm trying to attach a small piece of sheet steel (30mm x 50mm x 1mm) to a small piece of nylon (50mm x 50mm x 4mm). Does anyone know how they could be fastened using small screws ( Any thought appreciated.
WKleinberg
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How to link ends of timing belt into loop

When I buy some length of timing belt I don't know how to link ends of timing belt into loop. So far I've found one way to do that (thanks to http://www.lasersaur.com/): http://www.flickr.com/photos/stfnix/8697962319/in/set-72157624491114826 Any…
Marian Paździoch
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How to seal a threaded rod so I won't lose oil?

I have an M5 threaded rod that penetrates a box. Outside it is driven by a motor and it rotates a part inside the box. The box is sealed and I would like to seal the area around the rod as well. I have seen double lip oil seals but I don't think…
iamquestion
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Fuses for mechanical systems

** If there's a better stack exchange site for this, let me know--the mechanical engineering one is closed so I'm not sure where else is appropriate ** Do mechanical systems have fuses? In an electrical system, like a charging circuit for example,…
Robz
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How does a two-gear pull-back car toy work?

This is not a robotics question, but this Stack Exchange is the closest I could find to mechanical engineering. Please refer me to a better place to ask this, if one exists. Hopefully someone might just know this. I got a pull-back car for my boy…
aliteralmind
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Mechanism to oscillate a needle like object in vertical motion

I need to pop out a needle like object(toothpick,matchstick,etc) from a hole in a surface and push it back in automatically.I need to make a array of such needles in which each needle's position can be controlled individually.The objects aren't…
userxyz
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Is it possible to make DIY clone of MakerBeam

Is it possible to make clone of http://www.makerbeam.eu/ of some easy accessible material like: wood plywood OSB MDF HDF others Using any type of CNC machine to mill some holes and rails in those materials may give sufficient results e.g. to make…
Marian Paździoch
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Trying to rotate an axle that is oscillating along its axis of symmetry

I have an axle that is currently oscillating along its axis of symmetry, and I want to now rotate it around its axis of symmetry as well using a motor. I realize this is a pretty tough problem and may involve bearings or other systems of some kind,…
Thomas Coor
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What is the correct name for "servo brackets"?

I refer to these types of brackets as servo brackets, or robot brackets: I know that the two specific brackets, shown above, are known as a short-U (some vendors refer to them as "C", en lieu of "U") and a multi-function bracket, respectively, and…
Greenonline
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Comparison of lifting systems

What kind of systems can be used to make a torso lifting system like the one used by this robot (the black part) : Rack and pinion lead screw scissor lift can a triple tree help ? What are the pro and cons of each system ? How do they ensure…
LiohAu
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Wires or columns which contract on passing electricity

Background: Introductory robotics competition for college freshmen; Bot has to open 8 jars (with two balls in each of them) in ten minutes and load the balls into a shooting mechanism. So, we were doing this project and we hit upon a challenge that…
RecursiveCursive
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Trying to design a mechanical system with vertical and horizontal movement

I'm trying to devise a system to lift a 10kg weight a distance of 1.4m vertically, and allow it to move in/out a distance of 30cm. I'd like the motions to be able to occur simultaneously if possible. I'm thinking for the vertical motion I can use a…
johngiowa
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Simplest and cheapest way to create a spring back latch

My and a friend are hacking together a Nespresso Coffee pod dispenser. We have our heart set on a particular design after thinking up countless ways of dispensing a single pod. The design has a single flavour of pods in a vertical tube so they tend…
Kind Contributor
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