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Help constructing B-C


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929_14d1553560edaef1c77a117459c4d071.png
Hello everyone, Looking for suggestions on constructing the B-C Datum call-out on this print. I have a Contura G2 with curves but not freeform or PCM. Thinking this should be a 3D line thru all internal features or is it just a stepped cylinder ? (ASME 14.5-2009) Any help and suggestions appreciated. Thank you in advance.
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Hello,

In this case I use 3d line and it's works fine, you could try the both and see what happen, normaly it should be the same.

just a question with witch software do you make your red bubbles on the blueprint ?
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It's not everything in between B and C. It is only B and C. A step cylinder would be right but considering how short the depth is, I would create a circle on B, a circle on C, and a 3D line recalling the two circles.
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Also, make sure Datum B-C is constrained to Datum A. Due to the depth-to-diameter ratio already mentioned, adding ISO_5459 constraint will make the Datum structure more stable.

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Jeff Frodermann
Meier Tool & Engineering
Anoka, Minnesota


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Good question, Shabu. I guess I wasn't concerned with conforming to the standard, whether ASME or ISO. I ran into a similar measurement setup a year ago, and we were noticing too much instability in the constructed B-C datum due to the depth being much smaller than the diameter of the features. Constraining to the primary datum seemed to solve this problem.


Jeff Frodermann
Meier Tool & Engineering
Anoka, Minnesota



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I use inspection Xpert for my ballooning software. They have worked with us and can now populate data from the Zeiss, Keyence and Micro-Vu into our AS9102 forms automatically.
Thank you everyone for your inputs.
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For bubbling, I have some adobe stamps that I found.

You can unzip these into C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\Annotations\Stamps
(Or whichever adobe reader product you are using. I haven't figured out how to put them into other pdf software like foxit)

The only thing is you need to enable javascript in your reader settings. (Edit->Preferences->Javascript-> Check box)

But it is very easy to use. You stamp, put in your number, press ok. Then if you have keyboard shortcuts turned on (the key is J or K I think), it will select the same stamp again to make it faster. (Edit->Preferences->General->Use single key accelerators)
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adobe bubble stamps.zip

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