Move joint exactly

[ittay.dror]

I have a model of a concealed hinge (see https://forums.autodesk.com/t5/fusion-360-design-validate/how-to-create-joints-for-blum-or-similar-d...). It has 4 revolute joints so the overall movement is not a simple revolving around an axis. I want to set the joint limits such that the hinge is either closed (door lies on frame) or open (door perpendicular to frame). Trying to set limits "by sight" doesn't really work as the closed configuration makes the door go into the frame.
What I'd like to be able to do is to position the joint on a door/frame (with rigid groups to both) and then move the door so it lies flat on the frame and then either capture the position, or lock the joint limits (better of course sine I can then open/close the door). But the only way I know how to move is to drag with the mouse, which is not accurate, or, double clicking on the joints and setting values, which is tedious and doesn't give accurate results. 

[jeff_strater · Accepted solution]

I tend to use Align to help with this problem.  Once the joint is defined, you can still use Align to move the Joint so that, say, two faces are aligned (always, of course, assuming that such a position is possible within the degrees of freedom of the joint).  Then, you can reset the joint's home position to that setting.  You can then set the joint limits much easier. 

Here is a screencast that illustrates on a very simple model:

Jeff

[ittay.dror]

Thanks. Although I'd much rather have accurate joint limits, this solves the issue of moving accurately for my use case. 

[subversivespeed]

I currently have an Idea request to quantize movements in discrete intervals set by user ie 2 degrees, 5 degrees, .2 inch, etc whatever you decide to put in there. Any subsequent movement then moves that particular amount. 

I am using joints to model exhaust manifolds where the goal is to maintain a particular length and still fit in the engine bay around various obstacles. Unfortunately my axial rotation schedule is in 1 degree increments which is almost impossible for a regular welder to follow and maintain.