Full Version: Epicycloid Reducer animation

From: bemfarmer [#1]
 5 Jul 2016
To: ALL

This animation, with a .nod file, is similar to the piston model.
The Quartz node could use a reset.
The canvas should show the name of the .nod file currently loaded.
Saving the .3dm file, after stopping it, can unfortunately save multiple moved copies of the components.
A partly working revamped epicycloid reducer script was used to create the rotor and one roller, but the rest of the device
was modeled interactively in MoI. The number of points was upped to 500 to improve the curve. At Mesh angle of 10, there is some
minor "polygonalization" of the display, and some "flashing" and "jerkyness."
It is also possible to create the rotor interactively in MoI, with the help of the epitrochoid script, as outlined here:
https://www.youtube.com/watch?v=guvatctnjww
I'll try to get back to the camera script now.

- Brian

ps: The activation of the quartz node was previously described. <Not necessary in Nodeeditor v0.95>

See post #8 below for the .nod and the .3dm files.


Image Attachments:
EpiCycloidReducer11_1.png 

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From: bemfarmer [#2]
 5 Jul 2016
To: ALL

Regarding the YouTube link, 9 to 1 reducer:
The Marsala curve was done using the epitrochoid script. It is rotated 20 degrees from the YouTube line curve.
Its offset is the same curve as results from the epicycloid(reducer) script.
- Brian

Attachments:
NineToOneReducer04.7z

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From: Karsten (KMRQUS) [#3]
 5 Jul 2016
To: ALL

Hello Brian,

really cool stuff! You show the possibilities of the nodeeditor in an ellegant way!

Thanks for sharing!

Have a nice day
Karsten

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From: mkdm [#4]
 5 Jul 2016
To: ALL

Hi bemfarmer,

Thank you very much for your math experiments!

They're all very interesting!

Nice day,

Marco (mkdm).

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From: bemfarmer [#5]
 25 Sep
To: ALL

Updated epicycloid speed reducer .nod file to work with Nodeeditor version 0.95.
Added the frequency input to Quartz, and adjusted the frequency (speed) setting downwards considerably.
Looks pretty smooth at a low RPM, and a jitterbug at higher RPM :-)
The output shaft is missing, not to mention bearings...

Had to redo the 4 math nodes, went from blue wires to teal blue wires. (The prior node had 14 downloads.)
- Brian

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From: Mike (MGG942) [#6]
 25 Sep
To: ALL

Hi, Brian.

Not quite working properly for me - lots of clashing of parts.
No time to explore further for a while so will report back later.

Mike.

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From: bemfarmer [#7]
 25 Sep
To: ALL

Hi Mike,
yeah, something is out of whack.
It was working perfectly, but when saved, it must be "out of phase."
- Brian

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From: bemfarmer [#8]
 25 Sep
To: ALL

OK, here is the .zip file of the corrected .3dm of the gear, along with the .nod.
When I saved the .3dm from MoI, after having run and stopped the .nod,
the .3dm of the gear was not in its starting position.
Lesson learned.
- Brian

Attachments:
CycloidGearEpi.zip

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From: Mike (MGG942) [#9]
 26 Sep
To: ALL

Thanks, Brian.
Mesmerising and wonderful.
I look forward to studying the nod.
Mike.

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