Hello the trick of all that is this Put the joint orange(servo)to the piece orange then Group the Joint orange(servo) to the piece orange Only now use the "Joint Connector" from Servo orange to the "Parent" white!!! "Parent" white is previously made like this Put the joint violet(Hinge)to the piece violet(horizontal cylinder) then Group the Joint violet(Hinge) to the piece violet(horizontal cylinder) Only now use the "Joint Connector" violet Hinge to the "Parent" white (vertical pieces grouped)!!! (Input Name in Controller for initialize it) Rule is "put the joint to something"(not with the "connector"), "group the joint with the something", then "joint connector" the joint to a parent Have fun Sketchy Physics [image: 6DPD_concepta.jpg] roboticArmTest2.skp [image: nIrm_11s.jpg]

Nice work and thanks for adding the images

Ahhh, okay, thanks. I was just messing around with sketchy physics when i made this model and wasn't really paying attention to dimensions, thanks!

Don't know who made this model,found it on Warehuse. http://i12.tinypic.com/6o0ycso.jpg