I have hard time understanding something...
Bear with me, I´m trying to make myself clear.
I have a part thats looks like this.
The 8H7-holes are clear to me. I can report the positions with A,B C. No problem.
No comes the part that is hard for me to understand, since I don´t know how PC-Dmis solves that.
My alignment is in the left bottom corner.
Then I do the datums D, E.
Then I report the positions of the Ø10 holes.
But here is my problem:
They refer to the datums D and E but the theoretical dimensions refer to B and C.
When I choose "DISPLAY_COORDS=DRF" it basically sets the aligment to A, D, E and reports refered to that alignment.
When I chhoose "DISPLAY_COORDS=CURRENT ALIGNMENT" the reported values are based on the theoretical dimensions shown on the drawing.
The deviation of both positions are the same.
But when I report the Ø10 holes to B and C the deviations are different.
This is the point that I don´t understand how PC-Dmis solves that.
Another question:
When I just do A|D for the Ø10 I get different results than with A|D|E.
How does PC-Dmis geht the rotation when there is no third datum? Does it use the alignment for that? But that also wouldnt make sense because I put my alignment on A|D|E to test that.
Because "E" is not in perfect location and its not where its suppose to be mirrored to datum C, hence the clocking issue.
What JefMan says below, why use ADE when it says ADC?
Because "E" is not in perfect location and its not where its suppose to be mirrored to datum C, hence the clocking issue.
What JefMan says below, why use ADE when it says ADC?