https://forums.autodesk.com/t5/inventor-forum/flexible-nightmare/m-p/5521168#M385460 <P>Works like a charm for me. Just do what johnsonshiu explained to you. You have to constrain another angle, so it is no longer flipping.</P><P>When you work with flexible you have to make sure to not make the constraints to complicated. It will get very clunky anyway and you will expierience some performance problems.</P><P>&nbsp;</P><P>If possible try to use display representation, like min / max Position.</P><P>&nbsp;</P> Thu, 26 Feb 2015 12:43:44 GMT Anonymous 2015-02-26T12:43:44Z