Problem with flexing rotating parameters in a crane

[E-ROC]

I'm building a crawler crane which is a nested family, and also has 2 rotating parameters included. This is my Forster nested family design for my company & it's not cooperating with me. The crane itself is pretty much completed with the tracks being one family, 3 bodies are another, and the boom another. The body consist of 3 seperate body types which can be swapped using the yes/no parameter.the boom has a parameter which flex the boom up & down, with a pivot point on the front of the bodies. the problem I'm having is when I add a parameter to rotate the bodies, the body will turn, but the boom will appear to detach itself from the crane and point downwards( mirrored from it's original vertically 45 degree position( almost as if it's exploding when I try to flex it). The rest of the crane remains. Can someone please help me figure this out, thanks!

[gtarch]

I think you need to post the file, It's really hard to know what you are working with.

[jsteinhauer]

I'm building a crawler crane which is a nested family, and also has 2 rotating parameters included. This is my Forster nested family design for my company & it's not cooperating with me. The crane itself is pretty much completed with the tracks being one family, 3 bodies are another, and the boom another. The body consist of 3 seperate body types which can be swapped using the yes/no parameter.the boom has a parameter which flex the boom up & down, with a pivot point on the front of the bodies. the problem I'm having is when I add a parameter to rotate the bodies, the body will turn, but the boom will appear to detach itself from the crane and point downwards( mirrored from it's original vertically 45 degree position( almost as if it's exploding when I try to flex it). The rest of the crane remains. Can someone please help me figure this out, thanks!

I would use a Family Type parameter to switch out the different body styles instead of the yes/no parameters. If your boom is a face based family, try adding a reference plane at the height of the connection points. Then host your boom to that reference plane. Draw your reference line and assign the boom to that as it's workplane. If you are able to post this family, I'm sure several people will take a look at it for you. I have a link below to a thread I started when I was trying to do something similar.

Cheers,
Jeff S.


http://forums.augi.com/showthread.php?t=77355

[Craig_L]

Theres a very good blog here with a worked example for nested crane...

http://blog.cadway.com.au/2010/10/ma...ic-mobile.html