Alright here is my problem/question.
I have a part where Datum -A- (Z axis) is not prismatic, however datum -B- (X axis) and -C- (Y axis) are.
I do not have much experience with Iterative alignments other than that I have been to the Level 2 Hexagon class (Just don't use them or have the need too).
My thoughts were, this is a good time, to try an Iterative alignment.
I believe I have that part of the program correct:
I created 6 auto vector points on top (Datum -A-),
then 5 auto vector points on left side (Datum -B-)
then finally 5 auto vector points on the front of the part (Datum -C-).
When I create the Iterative alignment I pick top 6 points as level (Datum -A-),
5 points on left rotate (Datum -B-),
then 5 points on front as origin (Datum -C-).
After completing this Iterative alignment my trihedron doesn't move from before the alignment.
So I constructed planes out of the five points for datum -B- and -C- respectively.
I then origin my "X" to Datum -B- and my "Y" to datum -C-.
How do I origin my "Z", and how do I assign my datum -A- for exact measure? Where did I go wrong? Please any help would be greatly appreciated.
Where I work we make hardly any, if any parts that have straight edges and flat surfaces. As such I have to use iterative alignments in order to measure them. Every single part I measure has labeled on the drawing the datum targets and the X,Y,Z, co-ordinates of these targets. Without the X,Y,Z data I cannot create the datum's as I will be just guessing on the design intent of the part.
If you are given the X,Y,Z data of three target points for Datum A then that is all you have to input. A plane is then created from these three points and that is your datum.
If however you are not given the target data then you cannot create a plane just by guessing where the highest points are and also assuming that this is the design intent.
Where I work we make hardly any, if any parts that have straight edges and flat surfaces. As such I have to use iterative alignments in order to measure them. Every single part I measure has labeled on the drawing the datum targets and the X,Y,Z, co-ordinates of these targets. Without the X,Y,Z data I cannot create the datum's as I will be just guessing on the design intent of the part.
If you are given the X,Y,Z data of three target points for Datum A then that is all you have to input. A plane is then created from these three points and that is your datum.
If however you are not given the target data then you cannot create a plane just by guessing where the highest points are and also assuming that this is the design intent.