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.
That makes sense! So to get the rotation around for A|D PC-Dmis uses the current alignment?
I did the drawing myself and it should say ADE instead of ADC.
That makes sense! So to get the rotation around for A|D PC-Dmis uses the current alignment?
I did the drawing myself and it should say ADE instead of ADC.