Parametric dimensioning
Parametric dimensioning
(OP)
Say I have a part with four holes of equal size. On the drawing, I want to say 4X the size. Is there a way to drive that 4X from constraints on a sketch or a similar method? Such that, if I added a 5th hole to the part, the dimension would automatically update. Similar question for corner rounds. Can the count on their drawing dimension be driven by the model feature?
Jeff Parham
Mechanical Engineer - Design
New Product Development
Colorado School of Mines '09
RE: Parametric dimensioning
I'm not aware of a way to get an edge count for rounds but there should be a way as the software obviously knows how many edges were selected when creating the feature. This could only work if you select all the edges during the creation of the feature.
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: Parametric dimensioning
It is pesky that PTC never implemented that; it would be very handy.
The rounds is a tougher case because a single edge selection can, via tangency, end up selecting any number of other edges. Those edges may or may not be ones that humans would classify as worth counting as additional, so users would be fighting that incorrect count instead of making the correct count themselves.
The pattern option is the closest one can get, but I don't recall if the count is correct if one of the pattern members is discarded by unfilling its pattern indicator.
RE: Parametric dimensioning
and call it in a note as &NR_HOLES:8 x M16x20 (note the space after 8)
8 is part session number. you have to include a space if nr_holes is an integer, i don't know how to get rid of it.
EDIT: method from the first sentence doesn't work, i've tried it.