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View Full Version : Mechanical rigging, hydraulic robotic arm


gozzer
08-28-2007, 02:34 PM
Hi,

I'm currently trying to rig a robotic arm that stands on a hydraulic base and can rotate each of its three joints with some restriction. The problem is, I have no idea how to go about this. I've tried several approaches with a bone-structure, but I think that's a dead end.

Hopefully this will make more sense when you take a peak at the attached thumbnails.


I would like the hydraulic cylinders to extend one at a time, maximizing the first joint, then the second. The joints between the (yellow) cylinders can bend, and the disc/base they are placed on can rotate. Every approach I've had so far comes nowhere near meeting these rules. As for the hydraulic bit, I don't quite know where to start.

Any help and pointers you can give would be deeply appreciated!

If you want to have a look at the file, you can download it here (http://labs.danielskovli.com/acm327/scene1_01.mb) (Maya 7.0 binary).

Regards,
Daniel


Attachments:
http://labs.danielskovli.com/acm327/persp.jpg

http://labs.danielskovli.com/acm327/side_illustrate.jpg

yenvalmar
09-04-2007, 08:08 PM
more than one controll. for the parts of the arm with hinges, just rig that with normal IK. for the base that telescopes you can just animate it by hand or set driven key the joint extentions..

gozzer
09-05-2007, 01:55 PM
Thanks for your reply, yenvalmar. I had a semi-working IK rig up and running, with driven keys, as you suggested, for the hydraulics. The client, however, changed their m.o (as usual) so this scene is currently gathering dust up on the shelf :)

yenvalmar
09-05-2007, 07:11 PM
Thanks for your reply, yenvalmar. I had a semi-working IK rig up and running, with driven keys, as you suggested, for the hydraulics. The client, however, changed their m.o (as usual) so this scene is currently gathering dust up on the shelf :)

love it. these things have a way of coming in handy later on though, you never know.

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