Parallel edges drawing callout
Parallel edges drawing callout
(OP)
I am creating a drawing of a sheet metal part and want to specify that two edges are parallel. I used the parallel symbol and specified the datum feature as shown in the attached screenshot. Is this the standard way to call out two edges as being parallel?
Thanks!
Thanks!





RE: Parallel edges drawing callout
I'm assuming any not directly relevant missing info is elsewhere on the drawing etc.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Parallel edges drawing callout
There's nothing at all wrong with your callout - it is clear and unambiguous.
RE: Parallel edges drawing callout
RE: Parallel edges drawing callout
SW Professional 2015 SP 5.0
SW Electrical 2D/3D SP 5.0
64 bit
Intel Xeon X(R) CPU 3600 @ 2.80 GHz
8.0 GB of RAM
NVIDIA Quadro 2000
RE: Parallel edges drawing callout
All of that just because of one illiterate fabricator?
"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future
RE: Parallel edges drawing callout
Making one surface a datum and the other parallel to it probably gives the vendor more freedom in how to use the available tolerance.
Secondly, '2X' is explicitly supported by ASME and '2 PLACES' might be considered non preferred given the drive to more standard symbols and less wordy notes - like CH says don't let one incompetent vendor lead you astray.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Parallel edges drawing callout
There is a difference between just calling the same dimension twice and making one a datum and the other parallel to it. Only you know that the function is and how the allowed variation affects function.
If you want parallelism, the angle dimension should go on the datum surface. As you have it now, the datum is undefined and the other surface has two constraints, the angle and the parallelism. Personally, I think your Datum A surface is on the small side for a datum but your drawing units may be in furlongs so IDK.
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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: Parallel edges drawing callout
To dgallup's point, your datum feature seems small for a primary. Could you call one of the large surfaces primary, make the 48 degree angles basic, and use profile of a surface to control them to the primary? You could then refine the angle itself with angularity if necessary.
John Acosta, GDTP Senior Level
Manufacturing Engineering Tech
RE: Parallel edges drawing callout
SW Professional 2015 SP 5.0
SW Electrical 2D/3D SP 5.0
64 bit
Intel Xeon X(R) CPU 3600 @ 2.80 GHz
8.0 GB of RAM
NVIDIA Quadro 2000
RE: Parallel edges drawing callout