Flatness Callout Question 1

[rsm7400]

I have never seen flatness this way on any of my prints. I assume it means a flatness of .0010 across the entire area and no worse of a flatness of .0005 in a 1mm x 1mm area? Yes the print is in metric. Any help on interpretation? Thanks!

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Ryan M
Quality Engineer
3d Printer Hobbyist

 

[CheckerHater]

Wow, just wow.

Out of curiosity, what made you think it was flatness?

"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future

 

[rsm7400]

LOL definitely wow on my part, sorry when I typed it into my GD&T generator I hit the wrong symbol!!! Attached is the correct one.

________________________________
Ryan M
Quality Engineer
3d Printer Hobbyist

 

[CheckerHater]

Much better now.

Your guess is correct, and also (F) means "free state"

The numbers look a bit uncomfortable; are you sure this is metric?

"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future

 

[rsm7400]

100% positive I wont dare say how wide this plate is. Trust me it is a bit ridiculous, these are precision ground ceramics, holding sub-micron or millionths of an inch of flatness happens now and then, just not normally over this size, and I have never seen it called out this way. Usually my print will just say flat to "x" number of helium light bands or something like that.

________________________________
Ryan M
Quality Engineer
3d Printer Hobbyist

 

[dgallup]

If you can't do it then no quote it. Nothing pisses me off more than getting a quote for a part, giving a purchase order and then the supplier comes back with exceptions. Just this week I got a call from a supplier who we have been working with for over a year asking what the tolerance is on a part with a profile of a surface call out. They are supposed to supply PPAP this week and they are just getting around to figuring out the print?!?!?!?

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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.

 

[Nella95]

Here, here. Agree. What's the point of quoting a part if you can't actually do what the specifications on the print say? (Boggles my mind.)

SW Professional 2014 SP 5.0
SW Electrical 2D/3D SP 5.0
64 bit
Intel Xeon X(R) CPU 1603 0 @ 2.80 GHz
8.0 GB of RAM
NVIDIA Quadro 2000

 

[rsm7400]

I definitely agree with you. And we do have the capability, material, and measuring equipment. I had never seen the flatness callout with 2 values and never one that has something like the "1x1" next to it. Millionths of an inch, no problem. By best part is .000006 flat.

________________________________
Ryan M
Quality Engineer
3d Printer Hobbyist

 

[Gilmiril]

In a case like this, if you're capable of meeting the drawing specs, then I'd quote what it would take...but include a indicating that the price would drop by X amount if they could live with Y flatness tolerance. That's a polite way of questioning whether they really, really need it that flat (maybe they do, or maybe someone made a mistake).