When working with sheet metal and dimensioning true position of punched holes, from a design stand point is it necessary to include in the FCF the datum that lays in the same work plane as the feature being dimensioned ?
Tp Drf
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Generally it is included, but I think that is simply to SHOW that you are to dimension it with all degrees of freedom constrained. Almost all the prints I get will include ABC in the FCF for sheet metal pierce holes.
On a side note, you MAY want to TP them in the report with PERP TO CENTERLINE turned on to simulate a stab-pin check (it will 'remove' the surface variation from the TP dimension).sigpic
Originally posted by AndersII've got one from September 2006 (bug ticket) which has finally been fixed in 2013.
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Are you using the XactMeasure GD&T? It can do a simultaneous evaluation, which is what you have to do for similar DRF's, unless otherwise specified, see the standard.
Take all the AB FCF's and evaluate them simultaneously (you can find this under the Insert/Dimesions menu), same with the ABC frames. I do this all the time and it works good for me. Works great.
Also, from version 4.1 and higher, MMC on datums is handled correctly. In 4.0, there were some minor issues, but in 4.2 they have all been corrected.
Jan.***************************
PC-DMIS/NC 2010MR3; 15 December 2010; running on 18 machine tools.
Romer Infinite; PC-DMIS 2010 MR3; 15 December 2010.
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by BANDYHere as another TP problem. s/b 4x dia .2105 +/-.0015 Tp 0.020 m ABC also tp 0.008 to no datums. When I dimension the holes using Xactmeasure both .020...
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05-12-2008, 05:22 PM -
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Channel: PC-DMIS for CMMs
10-25-2007, 10:58 AM -
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whats your take on this FCF? (TP of .0005R to A)
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Channel: PC-DMIS for CMMs
08-10-2015, 03:25 PM -
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by NHopsonI am trying to measure a part with 4 holes aranged about a central bore that is datum B. There are basic dimensions to the 4 holes from the bore axis,...
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Channel: PC-DMIS for CMMs
03-20-2008, 11:05 AM -
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by NikoMHello to everybody.
Use to run into that issue before, but I would ask you to remind me what I should be aware if I want to report TP for...-
Channel: PC-DMIS for CMMs
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