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Another Rig question (Rod/Wheel Turn)
show user profile  RedStar
So I am rigging a tractor and came across an annoying little area. I have a rod that moves left or right resulting in the wheels to turn left or right.

I can do this with how I have it setup now and using wire parameters but would love to find a easier way? Possibly IK? I am new to Ik all together so I don't know what its limitations area.

Anyhow. I have a rod in the middle. Pivot on the front end, and the main wheel holder in the bottom right corner. When rod moves the pivot moves forward or back resulting the wheel to rotate. And that dark green is where the actual thing is locked into so that it would rotate on that area.

Any ideas guys?

read 333 times
1/18/2012 6:44:55 PM (last edit: 1/18/2012 6:44:55 PM)
show user profile  mrgrotey
Easy Squeezy Lemon Peazy...

...If you dont align the two pivots (hub and rod) to the same height (like at the start of the video) the parts wont rotate at 90°

Unable to display content. Adobe Flash is required.


read 316 times
1/18/2012 7:14:51 PM (last edit: 1/18/2012 7:14:51 PM)
show user profile  RedStar
Haha, I now learned about a new Ik lol. Thanks man!

Oh and question.
My hub is a bit slanted. Would that cause any issues?
read 309 times
1/18/2012 7:32:52 PM (last edit: 1/18/2012 7:33:16 PM)
show user profile  mrgrotey
Yes most probably, thats a different ballgame if it has camber. Not quite sure right now of how to get around that with simple Iks...


read 306 times
1/18/2012 7:36:39 PM (last edit: 1/18/2012 7:36:39 PM)
show user profile  RedStar
Gotcha. Yeah thats why I used wire parameters. It works fine, but when you go past a certain point (which we never will) the math doesn't add up and parts start to dis-align. Its not perfect, I like perfect lol.
read 296 times
1/18/2012 7:52:50 PM (last edit: 1/18/2012 7:52:50 PM)
show user profile  Mr.Burns
Could you post a top or front view? I'm trying to figure this out, but I'm not really a car guy, so I need more images ;)
read 288 times
1/18/2012 8:14:27 PM (last edit: 1/18/2012 8:14:27 PM)
show user profile  Garp
Another approach would be to have the rig controlled by the wheel rotation (around its vertical axis).
Wire the two wheels' z rotation together, have the 'pivots' look at each other and the rod linked to one (with its pivot there) and looking at the other.
Turn either of the wheels and the whole rig follows.

read 268 times
1/19/2012 1:48:58 AM (last edit: 1/19/2012 1:48:58 AM)
show user profile  Westcoast13
I still can't grasp this rigging business. Frustrating... :(

My Turbosquid Area

read 235 times
1/20/2012 10:49:11 AM (last edit: 1/20/2012 10:49:11 AM)
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