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.

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2answers
630 views

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 ...
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1answer
116 views

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 ...
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1answer
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Is this gear design feasible?

I came up with an idea and am working with a mechanical engineer to design and prototype the idea but I keep sketching out my own ideas in the process and I just came up with this.. I'm quite sure ...
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4answers
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Why linkage-based haptic devices are much more common than cable (tension)-based ones?

According not only to this link, but in my humble opinion to common sense as well, cable-based haptic devices have got lower inertia and are less complicated mechanically. I also believe that ...
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0answers
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How to connect a servo motor and a crank shaft

I have a standard 5v I am using the horn it came with it, I mean this piece: Like the long arm in the middle. Each of its holes are 1mm diameter. Then I have a 3d printed crankshaft I did: Its ...
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2answers
679 views

Industrial Robotic Arm

I had the opportunity to work for a factory/company that is in the domain space of production and they want to use a robotic arm for part of the production line. They want basically a robotic arm ...
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0answers
37 views

Actuation of three reciprocating blades via conversion of rotary to linear

Sorry if this is out of robotics, but this seemed the closest. A motor has to be used to rotate three cranks. They are in the same plane, but each should not run at the same time. Only one that ...
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1answer
93 views

What to use as electrovalve?

I want do make following installation (blowing bottle tops as music instrument): ...
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2answers
1k views

Building a non rotating persistence of vision device

I'm looking for a way to create a non-rotating persistence of vision device. I have all the electronics set up but I'm stumped with the mechanical design. I tried these two designs: But these didn't ...
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1answer
6k views

What motor to use for reciprocating (reversive) movement [closed]

I want to make a copy of this machine Fisher Price Soothing Motions™ Glider and I'm wondering what motor to use? Simple DC motor with appropriate gearbox (slow rpm) or stepper motor? Here is another ...
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1answer
486 views

Gears modeling in Google SketchUp and SketchyPhisics

I'm trying to make differential in Google SketchUp using this tutorial http://support.ponoko.com/entries/21249896-Gears-and-Joints-with-SketchUp-Sketchy-Physics for gears modeling. But I have problem: ...
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1answer
127 views

Once you understand motors, what's the next step? [closed]

I've gone through tutorials on how to build circuits and control dc, stepper, and servo motors. I may not understand everything about them internally, but i have a good basic foundation. Now i'm ...
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1answer
186 views

Lawn mower robot (type of cutter)

If not all, but major types of lawn mower robots are rotary mowers. I presume1 that reel mower is more efficient, and is said to leave a better lawn health and cut. So, why industry go to the other ...
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1answer
1k views

How does the Makeblock threaded slot work?

I've been looking into a Makeblock robotics kit but have found no information on the web that comes from end-users, and one of the main advertised features is not clear to me: The slot threads shown ...
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2answers
5k views

How to build a liquid filling machine using piston? [closed]

My team developed a filling machine for liquids which uses a piston to measure and deliver volumes 0.1 to 1 liters into bottles. It is built mostly with mechanical parts and we'd like to replace most ...
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1answer
3k views

How to measure and dispense a finite amount of powder or liquid

I've been watching too much How It's Made, and I've been wondering how they build devices that spray/inject/dispense a finite amount of liquid (to within some amount of error). I wanted to try this ...
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2answers
164 views

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 ...
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1answer
1k views

Good book on mechanisms [closed]

I am working with students (9th & 10th grade) on robotics and wanted to get a good book which covers basic mechanisms. Does anyone have any recommendations. Searching Google or Amazon yields ...
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1answer
3k views

Ideas for shooting the ball in a soccer robot [closed]

What is the best option to use for the shooting system of a soccer robot? I have already implemented a solenoid-based system for shooting and it works perfectly. However, I'd like some other methods ...

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