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kac

Planetary gear system question

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I am making a product that requires a planetary gear system and having trouble with making the negative gear for the outer rim because the teeth would be backwards. Is there any suggestions on a work around for this?

 

Thanks

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This is a good free site for creating regular external, rack and pinion, and internal gear combinations.  I usually trace with 3 point arcs to get smooth gears because these export as faceted.

 

http://www.hessmer.org/gears/InvoluteSpurGearBuilder.html

 

And a site for multiple standard gears (more than two linked gears are possible in a single export):

 

http://geargenerator.com/#200,200,100,6,1,0,0,4,1,8,2,4,27,-90,0,0,16,4,4,27,-60,1,1,12,1,12,20,-60,2,0,60,5,12,20,0,0,0,2,-563

Edited by setz

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I did subtract a gear from a disc but the tooth structure for an internal vrs external gear are different so they will never mesh. Printed a set out and they don't work no matter what. 

 

Thanks sets ill check that site out.

 

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