Mechanism Definition and 511 Threads

I have attached my attempt. The only thing I keep getting wrong is the direction of V_(D/B). I know it is perpendicular to r_(BD) but, I never know if it is going upwards or downwards. In this case, I thought it was going downwards but when I checked the answer key, it had said it is going...

Can anyone help me with a kinematic analysis for the mechanism attached below? I need the outline of the mechanism, its notes and the necessary formulas to find out the transmission ratio and the rest of the values.

Summary:: I am designing a linear telescopic system that gets elevated with a step motor, but in order to find the compatible motor, I need to work out the torque that is required for the elevation. I have uploaded my CAD model to this thread with how cables are connected. Could someone please...

I think the answer is both A) Cl and B) CCl3, since both are produced and used up. The correct solution is only A). Could anyone explain why? Thanks.

(I must confess I couldn't get far, owing mostly to the term "an average distance (of 12 cm) from the axis". Axis of the (peached coloured) wheel at the center with the arrow pointing down? Is the arrow the location of the "axis" of the wheel? Let me see.) Objective : To find the oil pressure...

Fully ionized gas, if compressed to a cylinder of mm scale, collapses rapidly and accelerates the e/ions to very high energies (MeV). The temperature in the compressed gas is around 100 eV. What could be the possible acceleration mechanism?

I'm designing loading mechanism of new machine and need to know what the torque will be. Here is the sketch of my mechanism. Distance from centre of shaft to the top of loading table is 200mm. Distance from the centre of mass of workpiece to centre of the shaft 50 mm. Max load is 400 kg. Weight...

Hi, I wonder how to approach stress analysis of quick return mechanism used in shaper machines (see the diagram below): The first issue is: which moment in the working process of this mechanism should be used for analysis (when will the mechanism experience largest loads)? So far I assumed...

Hi all, I'm currently designing a linear to linear transform mechanism (wedge cam design). Would like to check how much force required to push/ slide the roller down. To ease calculation, i have include some assumption: F2 = 1kg @ maximum compressed angle = 20degree F1 required = ? and how...

I hope that it is okay for me to ask this here. It has been a long time since i did mechanism analysis. I have what I hope is a quick question. I calculate the torque required to rotate crank AB and therefore lift up the link BC to be 88lb-in. I assumed that link AB has no weight, no...

Summary:: equation system of complex mechanism need to be done. Lagrange Formalism could be helpfull to do it but small errors could all destroy .. Hi everyone, I tried to find the equation system of the joined Mechanism (4 DoF). I think there is a mistake but I am not sure where is it . I...

help.. Need to create a simple mechanism to simulate a rocking chair.. I'm a carpenter with basic knowledge of electronics. I have created a chair that is supported with 20 mattress springs (under the chair). The chair is springy now, which is what I need. Now I need to run some kind of a...

Hello, I am trying to design a mechanism that moves a piece towards the center of a disk by rotating a second disk as described in the picture below. There is a stationary disk which restricts the motion of the piece, so it can move vertically only. There is also a second disk that it is located...

Given that a quasar is a super massive black hole with an accretion disk rotating at some significant percentage of the speed of light, what is the mechanism that generates the enormously luminous jet that emanates from the "poles" of the black hole that has become a quasar? a. The magnetic...

Hello, I would like to ask for ideas for a tilting mechanism for a machine that shoots out odd-shaped objects. These objects are quite large (about 50-100 kg each), are rolled around on castor wheels, and have slightly different contours. Here’s a sketch of the machine and the object: As...

Hi i need a mechanism to lower the heater to certain height then it will automatically go up. It could be auto or manual hand mechanism. In short i need a mechanism which is installed in drill press table machine to lower drill bit. But in my scenario it is heater to seal small packaging of...

Mammals go through two rounds of epigenetic "reprogramming" -- once after fertilization and again during the formation of gametes (sex cells) -- in which most of the chemical tags are https://www.realclearscience.com/blog/2014/03/end_the_hype_over_epigenetics__lamarckian_evolution.html. The...

Hello everyone, I’m trying to build a coupling system between two cylinders to connect them coaxially and transfer pulling force from a string on the surface of cylinder one to a string inside cylinder two. Please have a look at the sketches attached. Both of the cylinders have an outer...

Can you explain me how does it work? Circular into rectilinear motion. The waved-wheel or cam on the upright shaft communicates a rectilinear motion to the upright bar through the oscillating rod. i've not understood this explanation

In the following cross section, the static guide plate (light blue) is rigidly constrained, fixed to the body (not shown) of the mechanism. It serves as the mounting point for a cranked axle (dark blue) via a combination thrust and radial bearing (pink & yellow) that constrains it to a single...

Hi, Please have a look on the attachment. The displacement of swing from the equilibrium position, x=0, is considered to be maximum, +x, when the swing reaches the person who is pushing it. The pushing force is of short duration and could be approximated by a pulse. I hope I have it correct...

Hello everyone. I'm working on 3D animation about da Vinci tank and why it doesn't work. Please help me find out how to compute: 1: how many men need to move this machine 2: what power on wheel can produce different number of man, like 1, 2, 4, 8.. vehicle mass = 8t men strength = 60kg lever...

Hello!, First post and I am excited. I am an artist and want to see if the motor I have selected for this mechanism will work for a project I am working on. I am trying to see if the gearbox/motor I have sourced for this mechanism is powerful enough to drive it. The weight of the object I...

i want make a trap that can reset automaticly. above my simple drawing how its work, a hinge with lever, the end of lever hold by magnet. every time it swing down, wire attached on the end lever will pulled by motor with half arm. my question is, how to make switch that trigger motor to turn one...

Hello all! I wrote a reaction mechanism for a sequence that forms an amide. Do you agree with my answer? Thanks for your help!

This article from Science Advances (probably not open access, an AAAS publication) has described a complex and interesting molecular mechanism (a nano-bio-molecular machine). A rotary motor in the cell membrane (driving mechanisms unknown) spins a gear that pushes a "tread" along a track imbeded...

I'm having difficulties uploading my work to this system at the moment, but I have currently attempted 1,3-cycloaddition between the furoxan and phenylacetylene. However, unless a sigmatropic rearrangement occurs (which, as far as I can conclude, leads to instability with charges), this places...

Hello, I hope this is the right place to post about this. I live in a multi-unit condo, and I have a window that I am trying to lock and unlock from the outside. The window is from the kitchen and looks out onto a public-ish breezeway where I can access easily. I know this might seem a...

I need to protect electronic parts in case from water. The thing is, I need to design slide switch on the cap of the housing. Maybe any ideas?

Summary:: This is a question about finding the acceleration of a point in a mechanism Hi, I have a question about the mechanism shown in the attached picture: Question: We are told that \omega = 6 rad/s and the first part is asking me to find the acceleration of point P on the piston when...

I'm looking for recommendations for a relatively low-budget launching mechanism design for launching ping pong balls with high accuracy and high precision (able to consistently land within a 0.5 cm radius of a fixed point located about 30 cm away from the launcher). I've tried constructing a...

This was a marvel of technology for the time. Leave it up to the Greeks to invent something like this, they were at the forefront of innovation in the ancient world. https://en.wikipedia.org/wiki/Antikythera_mechanism

Hi. I have a application for a bistable spring mechanism. But my problem is that all of the ones i have seen require to go past the "midpoint" before it flips to the other side. Is there any such mechanism that flips over to position 2 before you get to the "midpoint" from position 1? Example...

So I am designing a mechanism where balls have to be fed from a feeder into a mechanism which can only intake 1 ball at a time. I have thought of multiple designs but all of them end up having the same problem i.e. the entry hole is choked if 2 balls try to enter at the same time. Does anyone...

Hi Guys, I am currently working on an assignment for my uni. I don't want to post the question right away as I want to try to understand as much of the material as possible; but it seems what they have given me is a bit lacking. As such I was wondering if anyone could point me in the right...

CH3CH2COCl + CH3ONa = CH3CH2COOCH3 + NaCl ? from propanoyl chloride is formed acylium ion?

Hello, regards to all. I am designing a CNC machine where the table will work as a Z axis. I have found a complication when trying to save space under the table, to avoid set the ballscrew upright I have decided to make a scissor mechanism but I have noticed that when the ballscrew travel 10mm...

Hello! I'm currently in the process of making a moving cosplay prop, and as a perfectionist, I'd like it to move exactly like the original. Kind of like in this animation: https://www.deviantart.com/ace-wong/art/RWBY-Qrow-s-Weapon-Animation-606779918 The problem I've stumbled upon, is how to...

I am making a robot and was wondering if this mechanism will work to turn my robot. Below is a small diagram of my robot. The main wheels are by the circle and there are a few small not power ones for stablisation in the tail. If I rotated the part pointed to in the tail or just the tail would...

Is anyone able to explain something to do with entropic force at a level I might be able to understand please! Ok... you need to know what level I'm at? Formal Maths & Physics at high school (I'm 50, so distant past :-) Informal Maths & Physics - lifelong interest. Consume a lot of youtube...

Hello everyone, So I'm trying to design a gripping system using a soft robot. I try to read a journal that explains about the gripping mechanism of the soft robot to measure the forces exerted by the soft robot to the object. The thing is, I got lost to several equations because I didn't find...

Hi Guys, I have a specific mechanism problem I am trying to solve. I can't divulge the specific application, however I am looking for examples of where this has been done in the past (or if this is even possible in peoples opinions).I have a mechanism that employs a weighted pendulum type...

Hi Everyone! I have ran into a wall in my design. I need connecting two spinning axles in a vacuum environment. The bottom axle is attached to a motor and the top axle is attached to a moving box. Is there a mechanism that can quickly quickly connect the axles when the axles are aligned? If...

The mechanism i need is one that give a reflex which is equivalent to the force we apply on it, so let's say you push on it softly for a long duration of time, then it will return softly for nearly the same duration of time. or if you pushed on it very hard for a short period of time, then it...

I'm brainstorming how to make an electric motorbike, making as much use of the available space as possible to allow for as many batteries to be fitted as possible. Batteries aren't relevant right now; my focus is on the final drive at the back of the bike. To maximise space, I want to fit the...

Designing a machine. For it to work properly there would need to be a mechanism that connects the linear actuator to the stand that would allow for the actuator to move horizontally relatively freely with applied forces at the bottom, when there is simultaneously a downward applied force by the...

I want to build a tilting wireless internet structure that is 24 feet high, with a fulcrum at 6ft. The idea is when I want to work on the device (which is 24 ft in the air), I can just unlatch the mast and tilt the structure down and work on it. I would like to have the pivot (or fulcum) at six...

Excuse me for bad wording in the title, but there is only so much you can do with the character limit. So, has there ever been a proposal for a mechanism through which negative energy density could be created? Or the only possibility considered so far was that it would have been created in the...

Homework Statement Two mechanisms are proposed (as seen in the screenshot). Which mechanism and which step as the rate determining step would best fit the data? Homework Equations I think this is more of a conceptual problem ... The Attempt at a Solution I apologise for not strictly...

I have a offset slider crank mechanism. Of which I know all the geometrical data, because I measure them . I do not understand how I can calculate the rotation angle of the connecting rod knowing the stroke.in my formula I have the angle b. I do not understand how to eliminate it from the...