Laboratory Rocker - type of mechanical movement & related information

AI Thread Summary
The discussion focuses on the mechanical design of a laboratory rocker, specifically seeking information on the relationship between motor circle radius, pin location, and table bearings for a smaller version. Participants suggest considering specific output requirements such as frequency, maximum angle, and weight of the sample to optimize design. Resources like Wikipedia's linkage page and "Machinery's Handbook" are recommended for understanding mechanical linkages and cam design. There is a call for sharing dimensions and rocking angle limits to facilitate calculations for pin positions. Overall, the conversation emphasizes the need for technical resources and collaborative input to achieve a successful design.
JohnSa
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Hi all

I have a question about this device in https://www.thingiverse.com/thing:2948680/files. Where can I find more information/reading material about this type of mechanical movement (for example, what is the ratio between the motor circle radius, pin location and the table bearings).

I wish to print a smaller one but I do not know where to start.

Thanks
 
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Welcome, @JohnSa !

Do you need an specific output for the sample to be rocked?
Example: frequency, maximum angle, weight of sample, way to fix sample to platform, etc.
The one shown in your link has an electronic panel controlling the motor.
It seems that because of that, the frequency and duration of the oscillation can be programed.
 
Welcome to PF.

Start reading here; https://en.wikipedia.org/wiki/Linkage_(mechanical)

If you can post your required dimensions and the rocking angle limits, we can compute the length between the pins, and so the pin positions on the components.
 
I have a question about this laboratory rocker, mainly about the part in the image attached red ellipse. Is there a technical scheme and mathematical equations set that allows me to simulate it using Matlab/Python? By this set it will allow me to calculate a rocker in different sizes.

machLinkage.png


BTW: I am a programmer and keen 3D hobbyist and not an engineer so any help will be appreciated.
 
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hsi100 said:
I have a question about this laboratory rocker, mainly about the part in the image attached red ellipse. Is there a technical scheme and mathematical equations set that allows me to simulate it using Matlab/Python? By this set it will allow me to calculate a rocker in different sizes.

View attachment 333991

BTW: I am a programmer and keen 3D hobbyist and not an engineer so any help will be appreciated.

If you have no experience I'd first check the link posted by @Baluncore at #3.
Baluncore said:
Welcome to PF.

Start reading here; https://en.wikipedia.org/wiki/Linkage_(mechanical)

If you can post your required dimensions and the rocking angle limits, we can compute the length between the pins, and so the pin positions on the components.

The section "Planar one degree-of-freedom linkages" should be especially relevant.
 
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