Go to Post [A screen shot] is very helpful - I've sent Brandon many of those the various times I've broken ChiefDelphi.com! - Jessica Boucher [more]
Home
Go Back   Chief Delphi > Technical > CAD > Inventor
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
 
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 01-07-2004, 11:48
ChrisH's Avatar Unsung FIRST Hero
ChrisH ChrisH is offline
Generally Useless
FRC #0330 (Beach 'Bots)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1998
Location: Hermosa Beach, CA
Posts: 1,230
ChrisH has a reputation beyond reputeChrisH has a reputation beyond reputeChrisH has a reputation beyond reputeChrisH has a reputation beyond reputeChrisH has a reputation beyond reputeChrisH has a reputation beyond reputeChrisH has a reputation beyond reputeChrisH has a reputation beyond reputeChrisH has a reputation beyond reputeChrisH has a reputation beyond reputeChrisH has a reputation beyond repute
Re: Gears in Inventor

Quote:
Originally Posted by Clark Gilbert
Heck with drawing gears all together. I guess you could bother with it when working on models for animation in 3d Studio Max or something. One thing I picked up from reading countless CAD prints from Andy Baker was that his gears were always just cylinders. This keeps unnecessary lines off your CAD prints and makes orthographic views and section views more visually pleasing. If you are making a 3d model to show off it will also be easier on your computer since it wont have to process all the teeth and faces. Even when making individual prints of just the gear keep the teeth off and make a note saying something like "Altered purchased gear."
This works for standard gears. But when you need say a 12 pitch 30 deg pressure angle 15 tooth gear, then you're kind of out of luck. You really do need to model the gear, teeth and all. Especially of you're using a rapid prototyping machine to make the real one

Fortunately this is pretty rare, but it does happen. One simplification I have used is to make a cylinder with diameter= Pitch Diameter-Dedendum and then make a trapezoid on the edge that has a height of addendum+dedendum and whose top is an arc covering the angle 360/(3*N). The bottom is twice that. This gives a pretty good looking gear without it getting huge in terms of file size. It also makes it easy to check and make sure you don't have problems with center distances etc. Of course you don't have to do the whole gear for that, just the section making contact.
__________________
Christopher H Husmann, PE

"Who is John Galt?"
  #2   Spotlight this post!  
Unread 01-07-2004, 23:32
ajlapp ajlapp is offline
Registered User
AKA: Anthony Lapp
None #0118 (Team RUSH and Robonauts)
 
Join Date: Sep 2001
Rookie Year: 1996
Location: Ortonville, MI
Posts: 648
ajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond repute
mech-q

i use mech-q plug-ins for AutoCad. they offer a free dowload that allows you to draw involute gears of any size, pitch, etc. you can then import the 2d drawing into inventor and do a simple extrusion. they also have plug-ins for sprockets. all-in-all it goes really quickly and you don't need to know anything about autocad to use it effectively.
__________________
Anthony Lapp
FIRST Engineering Mentor
Owner/Operator 221 Robotic Systems
221 Robotics Systems - Quality Hardware, Made in the USA
RobotOpen
anthony@221robotics.com
Twitter us: @221RobotSystems
Team 1 --> 94 --> 68 --> 221 --> 857 --> 27 --> 118
Design Engineer/Fabricator and 17 year vet
Team Rush (FRC27) and Robonauts (FRC118)
Closed Thread


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Helical Gears in Inventor 8 xxmaddjxx Inventor 4 26-06-2004 00:04
12 in. Wheel in Inventor 7 petek Inventor 1 17-01-2004 17:53
Autodesk Inventor Award 2002 Digo Inventor 1 24-03-2002 12:07
How do i make gears in inventor? mnkysp6353 Inventor 1 16-01-2002 02:31
Inventor and Virtual Kit of Parts Torchin Inventor 1 09-01-2002 09:59


All times are GMT -5. The time now is 18:40.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi