Hi all! I apologize in advance for being dumb.
I'm having an issue dimensioning a perpendicularity callout correctly. My part is flat with a hole (Datum D) drilled through. A horizontal slot is milled through the drilled hole, creating a top and bottom hole. Datum E is the thickness of the part. Now the feature control frame says D | Perp. to | E @MMC | Diam. 0.1 @MMC | Projected 100mm | I guess my question is what do I make Datum E be? I measured a plane at the top of the part and one at the top of my fixture, with which to costruct E. Now am I correct that, in order to correctly apply my bonus to E, E has to be some circular feature? And if I do apply MMC to the cylinder, will that be right, because MMC for E would be a thicker part, not a larger cylinder. Sorry, I'm really new to this. Thanks for any help.
-William
I'm having an issue dimensioning a perpendicularity callout correctly. My part is flat with a hole (Datum D) drilled through. A horizontal slot is milled through the drilled hole, creating a top and bottom hole. Datum E is the thickness of the part. Now the feature control frame says D | Perp. to | E @MMC | Diam. 0.1 @MMC | Projected 100mm | I guess my question is what do I make Datum E be? I measured a plane at the top of the part and one at the top of my fixture, with which to costruct E. Now am I correct that, in order to correctly apply my bonus to E, E has to be some circular feature? And if I do apply MMC to the cylinder, will that be right, because MMC for E would be a thicker part, not a larger cylinder. Sorry, I'm really new to this. Thanks for any help.
-William
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