I'm measuring the material thickness on a casting with curved surfaces. I have points at the same co-ordinates on opposite sides of the material and am having issues getting the correct readings. The vectors on the opposing points are opposite, not sure if this is correct. Since these are points not along a datum so measuring parallel or perp. to them is not an option. Thanks.
The casting is somewhat round with bulges in varied places.
Since these are points not along a datum so measuring parallel or perp. to them is not an option. Thanks.
I have points at the same co-ordinates on opposite sides of the material and am having issues getting the correct readings.
If I understand all this correctly, having points "at the same coordinates" on both sides of material is the problem. If the surface isn't normal to your alignment, then none of the coordinates will be the same on both sides of material. The opposing points need to lie along the same vector (provided you're dealing with a constant thickness).
If this is the issue, your cmm results will be consistently thicker than your caliper results. Is this what you're seeing?
The casting is somewhat round with bulges in varied places.
Since these are points not along a datum so measuring parallel or perp. to them is not an option. Thanks.
I have points at the same co-ordinates on opposite sides of the material and am having issues getting the correct readings.
If I understand all this correctly, having points "at the same coordinates" on both sides of material is the problem. If the surface isn't normal to your alignment, then none of the coordinates will be the same on both sides of material. The opposing points need to lie along the same vector (provided you're dealing with a constant thickness).
If this is the issue, your cmm results will be consistently thicker than your caliper results. Is this what you're seeing?
if the surfaces are not normal to the alignment, is there a way to get points opposite each other? e.g. if the surfaces are complex, how do you get points across from each other?
