[Me...] Posted September 17, 2019 Share Posted September 17, 2019 One extremely annoying issue about some prints is the rounding up or down of dimensions...We have a dimension that is supposed to be 2.094 per print, but is 2.0935 per model. What do you awesome folks do in this situation? Our customer 99% of the time says to follow the print, which 99% of time these days, is made by the model...VERY FRUSTRATING Link to comment Share on other sites More sharing options...
[Ri...] Posted September 17, 2019 Share Posted September 17, 2019 Have to follow whichever is the master - which should be stated on the drawing. I only have this issue with imperial system drawings - typically never with a metric drawing. Link to comment Share on other sites More sharing options...
[Br...] Posted September 17, 2019 Share Posted September 17, 2019 It depends on what the governing document is. Typically it is the drawing. Unless you are working to Y14.41, the drawing should contain all the design requirements needed to manufacture the part. If Y14.41 is invoked, you'll typically see a note that says something like "Unless otherwise specified, all surfaces to be [Some Profile of surface tolerance]". They are not supposed to use the general ± title block tolerances then either because everything not toleranced on the drawing is default back to the model rendering all dimensions queried from the model Basic. So to answer your question--If the drawing doesn't reference Y14.41, then use the provided model for reference and manufacturing aid, but make sure everything meets the drawing requirements in the end. Link to comment Share on other sites More sharing options...
[Ro...] Posted September 17, 2019 Share Posted September 17, 2019 Is it a profile dim that's in play? if so then you're pretty much stuck. If its a non profile dim then can you just adjust the nominals? Link to comment Share on other sites More sharing options...
[Me...] Posted September 17, 2019 Author Share Posted September 17, 2019 The dimension in question is a basic for a Profile of .002 in, The model is at 2.0935 and our manager is screaming follow the print but I can't seem to find a work around for the profile... Link to comment Share on other sites More sharing options...
[Me...] Posted September 17, 2019 Author Share Posted September 17, 2019 Please sign in to view this quote. Edit: The drawing has a 14.1 engineering drawing standard. Link to comment Share on other sites More sharing options...
[Br...] Posted September 17, 2019 Share Posted September 17, 2019 Please sign in to view this quote. 14.1 is "Decimal Inch Drawing Sheet Size and Format". Y14.41 I was talking about is "DIGITAL PRODUCT DEFINITION DATA PRACTICES". With this you can set your model and the governing or as Richard put it "Master" document. Anyway, sounds like that isn't the case and you need to inspect to the drawing. If the True Profile is too complex to edit in Calypso, you either need to create a new model in solidworks or whatever CAD software is available, or you need to contact your costumer and ask for an accurate model to do the Inspections to. Link to comment Share on other sites More sharing options...
[Me...] Posted September 17, 2019 Author Share Posted September 17, 2019 Please sign in to view this quote. I forgot to mention that there are two callouts that are affected. One is a 4 place .0010 TP callout, and the other is a 3 place .002 Profile...Does this change anything? The view that shows the TP has no basics in it, the reference Basic dimension is on another page. Link to comment Share on other sites More sharing options...
[Br...] Posted September 17, 2019 Share Posted September 17, 2019 Please sign in to view this quote. It doesn't matter what view the basic dimensions are in. They just have to be somewhere on the drawing. The decimal places don't matter either. Those are absolute numbers. The basic dimensions are indirectly toleranced by their respective the Geometric Tolerances. They are theoreticaly exact dimensions. The tolerances themselves are what they are. If your Position tolerance is .001", then that is what it is no matter how many zeros trail at the end. Link to comment Share on other sites More sharing options...
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