Graphscad

Graphscad : The Graphic Nodal Editor for OpenScad
 
HomeCalendarFAQSearchMemberlistUsergroupsRegisterLog in

Share | 
 

 Animated planetary gears

View previous topic View next topic Go down 
AuthorMessage
ChrisLT



Messages : 45
Date d'inscription : 2017-01-30
Localisation : Newbury, Berkshire, England

PostSubject: Animated planetary gears   Mon 30 Jan - 20:33

I took the existing planetary gears model in the Examples folder and extended it to support animation and changing of the gear ratio. To run the animation, load it into OpenSCAD and select Animate in the View Menu. Set values for FPS and Steps. 45 and 90 seems to work nicely. The animation will start and run indefinitely until you turn it off in the menu.

Planetary gears can be used in several ways. I have animated only the form where the outer ring is fixed.

You can change the numbers of teeth on the sun and planet gears, either as parameters in GraphSCAD or by editing the parameters in OpenSCAD, where they conveniently appear very near the top of the file.

Note that both figures must be either odd or even for the gears at 90 degrees to mesh correctly. Also, the sun must not be too small or the planets will collide with one another. Both of these conditions are tested for and warning messages displayed in the model window.

I am currently using GraphSCAD 1.0.0 on Ubuntu 16.

Chris Lusby Taylor
clusbytaylor@gmail.com
30 Jan 2017
Attachments
PlanetGearsAnimated.zip
Zip file containing only the scad file.
You don't have permission to download attachments.
(8 Kb) Downloaded 1 times
Back to top Go down
View user profile
Admin
Admin


Messages : 59
Date d'inscription : 2017-01-08

PostSubject: yeahhhh   Mon 30 Jan - 20:41

The graph you made is cool ;-). Was a little lazy to compute rotation od each gears to animate them ;-)

this give me idea to implement an option to output animated gif with graphscad

Back to top Go down
View user profile http://graphscad.forumotion.com
Admin
Admin


Messages : 59
Date d'inscription : 2017-01-08

PostSubject: Re: Animated planetary gears   Mon 30 Jan - 20:45

and you added parameters.... really good !
Back to top Go down
View user profile http://graphscad.forumotion.com
Admin
Admin


Messages : 59
Date d'inscription : 2017-01-08

PostSubject: Re: Animated planetary gears   Mon 30 Jan - 21:06


Back to top Go down
View user profile http://graphscad.forumotion.com
ChrisLT



Messages : 45
Date d'inscription : 2017-01-30
Localisation : Newbury, Berkshire, England

PostSubject: Re: Animated planetary gears   Mon 30 Jan - 22:16

Admin wrote:

Unfortunately, this animated gif has too few samples, so the central sun gear appears to be going backwards. This is like wagon wheels in old western films.
Back to top Go down
View user profile
Admin
Admin


Messages : 59
Date d'inscription : 2017-01-08

PostSubject: this one is better.....   Tue 31 Jan - 0:26


Back to top Go down
View user profile http://graphscad.forumotion.com
Sponsored content




PostSubject: Re: Animated planetary gears   

Back to top Go down
 
Animated planetary gears
View previous topic View next topic Back to top 
Page 1 of 1

Permissions in this forum:You cannot reply to topics in this forum
Graphscad :: show your creations-
Jump to: