your animation IS correct- people do not understand the mechanism. the red link alters it's position relative to the green wheel/white pin every revolution- based on the eccentricity of the grey axle. it took me a minute to realise how it works. good work!
@TAPriceCTR Now I see what you mean. I did the animation and my daughter did the talking. She is not in mechanics and she just fallowed my instructions. When I checked my notes, I see the subtle mistake I made that you mentioned. Thank you for clarifying it. I am glad that people like you pay close attention to minute details. Your help will be appreciated.
in that video that white point that connect connecting rod and wheel is fixed to wheel so depending upon rotation that red bar slides too and fro motion throught white fixed point
I do my animations in Adobe Flash. I do not have much experience in 3D animation of assemblies, but I wish I had. Currently I am experimenting with SolidEdge. Thank you for SolidEdge company giving me an educational licence. As I said, I do not have much experience in 3D animation, but I liked SolidEdge.
I just found the complete Nova presentation on YT. At the 37 minute mark is where the pin and slot mechanism is shown in detail. It performs the same function as the demonstration in this video. Ancient technology continues to amaze me. The UA-cam title is listed below. Ancient Computers | NOVA | JUNE 2013 Uploaded by Dreamer Nick
@WalneySkyland I agree with you hundred percent. Nothing replaces inspecting a real model of a mechanism. Since we can't distribute a real model all around the world, the next best thing is 3D visualization of the mechanism. Unfortunately I do not have any software where I can create 3D animations. This is the next thing in my to do list.
@TAPriceCTR Some off these animations that I made are time consuming and difficult. My purpose is to educate young engineering students about mechanisms. Our generation did not have the luxury of Internet, UA-cam and Flash animations. I wish we had. So while I do these animation unintended mistakes happen. I always take good and correct criticism with respect. Here is a saying that I like about good criticism. "The strength of criticism lies in the weakness of the thing criticized."
I just thought of a very good use for this... a stirling engine has a return stroke, not a compression stroke... the heat transfer is continuous as such the faster you return the more efficient not to mention the increased power to weight ratio of spending a greater percentage of time in the drive stroke. also injecting the cold air faster will also grant improved efficiency.
you have no idea how glad I am to see you say that... virtualy NOONE these days can appreciate such corrections and sometimes I wonder if I am the only one who wants to be shown my mistakes. then again, making such an animation you are mechanicaly minded so maybe that is why, like me, you prefer correction over perpetual mistake no matter how small :)
@mekanizmalar "pin" should not have been in that sentence, my mistake, it should have just said "the black link". time 1:10. she says that part freely slides as well, it does not (only the pin attached to the gear slides freely in the red arm). it is adjustable as mentioned at 3:30, if she made the animation she did it by someone elses instructions because if she understood the device she would not have made that subtle mistake at 1:10.
@mekanizmalar "pin" should not have been in that sentence. time 1:10. she says that part freely slides as well, it does not. it is adjustable as mentioned at 3:30, if she made the animation she did it by someone elses instructions because if she understood the device she would not have made that mistake at 1:10.
@WalneyCol I hope you are not mixing Whithworth Slider-Crank mechanism which is also a quick return mechanism with Whitworth Quick Return mechanism. The second quick return mechanism is more complex then the first one and has many advantages. If you think the second mechanism is also very simple, than you have very good knowledge about this kind of mechanisms. These videos are prepared for the people who want to know more about mechanism and they do not have as much knowledge as you have.
his is wrong the rotation should be unti clock vice ..make it correct..now it is quick cutting and slow return ..i cant understand why no one have notes that ..every one only get want they say not to see is it Right or Wrong.. what a shame
![Mechanical Principles (1930) by Ralph Steiner [4min selection]](/img/n.gif)
your animation IS correct- people do not understand the mechanism. the red link alters it's position relative to the green wheel/white pin every revolution- based on the eccentricity of the grey axle. it took me a minute to realise how it works. good work!
@TAPriceCTR Now I see what you mean. I did the animation and my daughter did the talking. She is not in mechanics and she just fallowed my instructions. When I checked my notes, I see the subtle mistake I made that you mentioned. Thank you for clarifying it. I am glad that people like you pay close attention to minute details. Your help will be appreciated.
in that video that white point that connect connecting rod and wheel is fixed to wheel so depending upon rotation that red bar slides too and fro motion throught white fixed point
I do my animations in Adobe Flash. I do not have much experience in 3D animation of assemblies, but I wish I had. Currently I am experimenting with SolidEdge. Thank you for SolidEdge company giving me an educational licence. As I said, I do not have much experience in 3D animation, but I liked SolidEdge.
@TAPriceCTR The black pin is a shaft that the red arm rotates around it.
I just found the complete Nova presentation on YT. At the 37 minute mark is where the pin and slot mechanism is shown in detail. It performs the same function as the demonstration in this video. Ancient technology continues to amaze me.
The UA-cam title is listed below.
Ancient Computers | NOVA | JUNE 2013
Uploaded by Dreamer Nick
@WalneySkyland I agree with you hundred percent. Nothing replaces inspecting a real model of a mechanism. Since we can't distribute a real model all around the world, the next best thing is 3D visualization of the mechanism. Unfortunately I do not have any software where I can create 3D animations. This is the next thing in my to do list.
@TAPriceCTR Some off these animations that I made are time consuming and difficult. My purpose is to educate young engineering students about mechanisms. Our generation did not have the luxury of Internet, UA-cam and Flash animations. I wish we had. So while I do these animation unintended mistakes happen. I always take good and correct criticism with respect. Here is a saying that I like about good criticism.
"The strength of criticism lies in the weakness of the thing criticized."
I just thought of a very good use for this... a stirling engine has a return stroke, not a compression stroke... the heat transfer is continuous as such the faster you return the more efficient not to mention the increased power to weight ratio of spending a greater percentage of time in the drive stroke. also injecting the cold air faster will also grant improved efficiency.
you have no idea how glad I am to see you say that... virtualy NOONE these days can appreciate such corrections and sometimes I wonder if I am the only one who wants to be shown my mistakes. then again, making such an animation you are mechanicaly minded so maybe that is why, like me, you prefer correction over perpetual mistake no matter how small :)
I did not watch that episode of NOVA. I can assure you I will watch it soon. I never miss any NOVA show, but I miss that one.
As you said, there ase some variations of this mechanism. This one allow stroke adjustment.
The description of the stroke direction in relation to the blue and red segments is reversed
that's arguable the most confusing illustration of this simple mechanism I've ever seen
@mekanizmalar
"pin" should not have been in that sentence, my mistake, it should have just said "the black link".
time 1:10. she says that part freely slides as well, it does not (only the pin attached to the gear slides freely in the red arm). it is adjustable as mentioned at 3:30, if she made the animation she did it by someone elses instructions because if she understood the device she would not have made that subtle mistake at 1:10.
@mekanizmalar "pin" should not have been in that sentence. time 1:10. she says that part freely slides as well, it does not. it is adjustable as mentioned at 3:30, if she made the animation she did it by someone elses instructions because if she understood the device she would not have made that mistake at 1:10.
the black pin link is not sliding, it is fixed in the red arm.
@WalneyCol I hope you are not mixing Whithworth Slider-Crank mechanism which is also a quick return mechanism
with Whitworth Quick Return mechanism. The second quick return mechanism is more complex then the first one and has many advantages. If you think the second mechanism is also very simple, than you have very good knowledge about this kind of mechanisms. These videos are prepared for the people who want to know more about mechanism and they do not have as much knowledge as you have.
Thank you CRMF1.
When I did the animation, info was limited. Sometime in the future I may revisit
Antikythera mechanism.
Does the black pin and the white pin/ram have to be slotted, or is this for variations of the animation? Thanks for posting, very useful.
Good mechanism.
Thank you.
Sir, are there any other mechanisms that make the speed of one stroke faster than the other? Thank you
Yes, I am trying to learn Autodesk Inventor, because it has 3d animations of assemblies. I wish I could learn with you, because I am stuck.
black link moving forward in blue half circle and return in red circle ? is it so what are you talking dear
I don't know nastran. I looked at the web page for the price. It says "Request a quote". That means I can't afford it.
very nice explanation! :)
Actually I have animation of that mechanism in my web page.
mekanizmalar com antikythera html
white pin is not sliding , it is fixed
his is wrong the rotation should be unti clock vice ..make it correct..now it is quick cutting and slow return ..i cant understand why no one have notes that ..every one only get want they say not to see is it Right or Wrong.. what a shame
way too nice!!
super
its helpful
whit worth.......