Dear All,

I am trying to design a cam shaft using Motion Study/Motion Analysis. I created assembly and defined (error) function, which is to be minimized when cam part approaches ideal shape.I make analysis, export data to Excel and evaluate error function. I repeat this with different geometry and evaluate if function increased or decreased. However I reach a point, from where this approach no longer works. It seems that function value is no longer correlated only to geometry of cam part.

What I found out is, that repeating Motion analysis after some dimension in cam part sketch is edited but not actually changed leads to different results of function. If analysis is just repeated, without part being edited, results are completely repeatable.

What could be explanation why repeating analysis with same geometry, with part being edited but not changed, leads to different results and how to avoid it?

Best regards,

Matic