Alignment Help

[dtmtim]

Good morning, the datums defined on the customer print are a bit confusing and may not be defined correctly (big surprise).

Datum A = Plane
Datum B = Hole
Datum C = Axis between 2 opposing studs the location of which is defined as basic in the X,Z plane from datum B. I have picked up the diameters of both studs and created a 3d line between them. Then I created a point at the midpoint of this line to use for Datum C.

Datum A is leveled to Y Pos
Datum B is constrained to X=0.0 Z=0.0
I believe the part now has to rotate around datum B until it gets as close as possible to the basic location of datum C. (Best fit for C only rotating around datum B).

If the above interpretation is correct what is the correct alignment method to "clock" the part and remove the last remaining degree of freedom? BTW I am using a CAD model and V4.0 for todays festivities.

Thanks !!!

t.

[JamesMannes]

To start I would do an iterative alignment manually and in DCC mode. Not necessarily using the datum structure presented for review.

Then I would go on to my print datum structure. This is my methodology, you don't have to follow it, but I have quite a bit of luck with it.

Datum A = Plane
Datum B = Hole
Datum C = Axis between 2 opposing studs

Level -A- to the Y axis (-Y if the plane is facing you, +Y if the plane is facing away from you)
Rotate -C- to the X axis (dependant on the way the line was created) about the -/+ Y axis (see above)
Translate to -B- in the X and the Z
Translate to -A- in the Y axis
All degrees of freedom are constrained

P.S.
I would be using a 2D line for -C- (remember to be in the correct workplane)

[dtmtim]

Thank you !