Jump to content


Photo

Planetary gear system question


  • Please log in to reply
3 replies to this topic

#1 kac

kac

    Advanced Member

  • Members
  • PipPipPip
  • 72 posts

Posted 29 December 2017 - 11:39 AM

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



#2 Andrew West

Andrew West

    Advanced Member

  • Members
  • PipPipPip
  • 381 posts
  • LocationBend Oregon

Posted 29 December 2017 - 01:16 PM

Create a disc the exact size of the outer ring.  Then create a gear that would fit inside that disc.  Use Boolean difference to subtract the gear from the disc and you now have a negative ring gear. 

 


  • jsiggia likes this

#3 setz

setz

    Advanced Member

  • Members
  • PipPipPip
  • 413 posts

Posted 29 December 2017 - 05:12 PM

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.o...earBuilder.html

 

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

 

http://geargenerator...20,0,0,0,2,-563


Edited by setz, 29 December 2017 - 05:20 PM.


#4 kac

kac

    Advanced Member

  • Members
  • PipPipPip
  • 72 posts

Posted 29 December 2017 - 06:56 PM

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.

 






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users