Questions tagged [mechanisms]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0
votes
1answer
75 views

How to quickly design and simulate crank based mechanisms? [closed]

I'm doing a project on Theo Jansen's Mechanism, where I have to modify the mechanism. What is the most efficient way to design these mechanisms? Is there any good software where I can just draw the ...
3
votes
3answers
424 views

what college level teaches mechanical linkage design?

I'm 17 years old and learning first-year college math. What college level math do I need for mechanical linkage design? Can I learn designing and creating mechanical linkage without math but with my ...
2
votes
1answer
98 views

What is this linear movement mechanism called?

Does anyone know what this mechanism for linear movement is called? I have a different model of something like this, and the black chain appears rigid, so I assume it is the mechanism moving the laser ...
2
votes
0answers
52 views

Rotating four cylinders with one motor/actuator

I have a setup with 4 cylinders placed next to each other in following configuration. The cylinders are made of .2mm stainless steel. I would ideally want to rotate them along their axis using a ...
1
vote
0answers
2k views

Mechanisms to convert linear motion to rotation

These are the mechanisms I'm aware of: Crankshaft Scotch yoke cam-shaft wobble drive (a.k.a nutator or Z-crank) swash-plate What are other mechanisms to convert linear motion to rotation?
2
votes
1answer
120 views

Aluminum sliding mechanism clamping

I have an O-shaped aluminum (7075) profile WxDxH - 40mm x 200mm x 25mm The inner channel is 20 mm wide and 10 mm deep - runs through the entire length of the bar. Inside, I have a 20 mm x 10 mm bar (...
1
vote
1answer
236 views

Will this straw feeder work?

I'm building a machine to make drinks and I would like to be able to put a straw into the cup. To achieve this, I need to build some kind of mechanism, that will be able to feed me with one straw on ...
0
votes
1answer
102 views

How can I *more accurately* measure the weight of a hanging bottle?

I have a project where I need to be able to measure the volume of remaining liquid in a bottle based on weight. The idea is to use a Force Sensing Resistor: (model FSR402-Short Tail: http://www....
0
votes
1answer
2k views

redundant links in a mechanism [closed]

I know that a redundant link is a link that doesn't affect the motion of the mechanism even if it is removed . But how could we recognize these links ? I was solving a problem abuout finding the ...
0
votes
1answer
344 views

how can I improve my chain-drive lifting system?

I am, in actuality, a network engineer and not a trained mechanical engineer. It was kind of a hobby of mine until recently, when my boss gave me the opportunity to try my hand at mechanical ...
1
vote
1answer
337 views

How to model a planetary gear system with transformation matrices?

I need to model the planetary gear-train with transformation matrices of 1 sun and 2 planets system, with no ring and an "arm" or carrier holding the gears ,like in the second picture. I ...
2
votes
1answer
125 views

How to make an arduino pick an individual plant seed?

I am trying to build a robot which would plant seeds instead of humans doing it (lettuce, radish and so on). The only problem i have so far is picking an individual seed. How could i do it? I've seen ...
0
votes
1answer
415 views

Shaft to swap direction of rotation

What is the simplest way if you have a shaft rotating clockwise for it to have an extension that rotates anti clockwise. Least loss of energy is best so i think a mechanical mechanism would be best. ...
4
votes
1answer
258 views

What is this contraption?

If this is the wrong place for this question, please migrate it to someplace where it's more suitable. So one of my old teachers from my previous school sent me a contraption to try and figure out ...
1
vote
0answers
347 views

Synthesis of 5 bar mechanism

I'm working on my university project but I can't find a proper synthesis method for 5 bar mechanism. I'm working on underactuated mechanism. It's a slider crank with the connecting rod divided into 2 ...
1
vote
1answer
74 views

Is the oldham coupling homokinetic?

I am finding different opinion, but I can not find a mathematical demonstration about this topic. for example here is described as non homokinetic: Oldham coupling vs Universal joint here is ...
0
votes
1answer
132 views

How to make a lazy susan 'lift'?

I want to make a smaller version of a revolving stage with rotation and lift. But how do you combine those mechanism that creates a turntable and that rotates and lifts up at the same time? I know ...
1
vote
1answer
195 views

How to couple two pistons to a rotating shaft so that the piston heads move like this?

Assume two vertical pistons with their flat head facing upward. Is it possible to couple them to one rotating shaft in a way that the position vs. time diagram gets like this? (This is one complete ...
3
votes
2answers
625 views

How this radio knob converting a rotation into a straight-linear motion?

Few months ago I opened the boards of an old, scrap radio-cum-tape-recorder (Philips DR183); whose tuning knob (that adjusts the gang); was very peculiar. ( * I did not found its datasheet on web) ...
2
votes
0answers
590 views

IV drip/flow rate controller design

I have a question about intravenous flow rate controllers, which are controlled using microprocessors. For example: I want to control the IV flow rate, the flow is in range from 0 to 300. So, I just ...
2
votes
1answer
45 views

How can I modify a pair of two-way switches so that the circuit can also be opened or closed remotely using a device?

I have a pair of two-way switches at different floors to control a light bulb. I wish to put an Android-phone-controllable external switch over either switch to flip it up or down. I am familiar with ...
2
votes
3answers
98 views

designing a flexible plate

I am looking for ideas for the following. I want to design a flexible plate where I can control the bending of the plate. In particular, a 5”x2” plate will be used which can be bent with some ...
1
vote
1answer
11k views

Difference between a “Pulley” and a “Wheel and axle”

A "Pulley" and a "Wheel and axle" seem much similar to each other. What is their actual difference and what are their precise definitions? My understanding of the two terms is much relied on the ...
4
votes
1answer
1k views

How does a flexible endoscope turn?

By flexible endoscope I mean colonoscope, gastroscope, etc. From this video I can see that an endoscope can swivel its tip while in place, kind of like a periscope. But while moving axially, i.e. "...
0
votes
2answers
3k views

Difference between Linkage, Kinematic chain, Mechanism, Mechanical element, Mechanical machine and their precise definitions

Recently I started to study about "Design of mechanical machinery". Since I am a person who is very sensitive about words I want to know the difference between these notions and their precise ...
1
vote
3answers
1k views

Applications with combination of high friction and low wear?

What would be some common applications involving high friction and low wear rates? for example, gear-driven mechanisms which require high friction between the gear teeth but ideally low wear between ...
0
votes
1answer
727 views

How does the SRI “Abacus” rotary transmission work?

I'd like to understand the new SRI "Abacus" transmission, recently reported at http://spectrum.ieee.org/automaton/robotics/robotics-hardware/sri-demonstrates-abacus-rotary-transmission I haven't been ...
1
vote
1answer
603 views

4 bar mechanism simulator

I'm trying to design a jewellery box, with a mirror in the lid. When open, the lid should rest at an angle of about 135 degrees from original closed position. I've been learning about 4 bar ...
6
votes
2answers
3k views

Is there a mechanism that can turn circular motion into alternating circular motion?

I'm trying to power and agitator (alternating circularly back and fourth) with a crank. I've seen a bunch of complicated mechanisms that do this, but I'm looking for the mechanically simplest method.
2
votes
0answers
306 views

Designing a clamping mechanism for linear sliding stick

the problem I'm prototyping for a musical instrument based on sliding sticks (see https://vimeo.com/170450482) but I'm struggling to make a robust, yet smooth clamping mechanism for the sticks. The ...
3
votes
1answer
1k views

Alternative to eccentric spacer nuts

I am using eccentric spacer nuts to create a tight fit between wheels and a rail of a linear sliding mechanism. (Expand the product description in the link to see a picture of it in use). They aren't ...

1 2 3
4