Absolute accuracy recommendation for consumer electronics

[dmartin]

Everyone,

We could use some advice regarding what other companies, particularly those in consumer electronics, are using for accuracy values in Creo. We've been using relative accuracy as a default, and of course that comes with a lot of issues. We're exploring values for absolute accuracy, and we thought to reach out to the community to hear your experiences. We've heard that Motorola, for example, uses 0.003 mm. Can anyone share what you're using and successes and failures from your approach? Thanks in advance.

David R. Martin II

Senior CAD Application Specialist

Amazon

[bokm9606]

.001 mm absolute is what I have been using for tiny parts

[bfrandsen]

We are using 0.005 mm.

Best regards

Bjarne Frandsen | Technology Specialist, MCAD
Phone: +45 9684 4825 | Email: -

[cid:image001.png@01CDCC9C.5B8352F0]

Bang & Olufsen A/S | Peter Bangs Vej 15 | DK-7600 Struer | Denmark
www.bang-olufsen.com

[dgschaefer]

I've been using 0.0001" / 0.00254mm (the default when choosing absolute accuracy) for everything since I started on Proe back in 1996, rev. 16. It has generally served me well; I've had few occasions where I needed to tweak it. My biggest accuracy related problems have been with files created with relative accuracy.

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[GaryPitt]

Hi Dave - we make injection moulds and have been using 0.0002" (0.005mm) as
our default accuracy for 15 years.


Regards

Gary Pitt
Columbia Plastics Ltd
19320-60th Ave
Surrey, B.C.
V3S 3M2
604 530 9990 Ext 236

[jmoody-2]

Discussion of absolute accuracy should include the typical part size, no?





John

[PaulMailloux]

Same here, .0002” absolute accuracy for over 17 years now… with an occasional deviation by a .0001” to either side… we stay clear of relative accuracy.



Paul



Paul Mailloux Cad/Cam Applications Engineer



NyproMold, Inc.

144 Pleasant St, Clinton, MA 01510 ▪ www.nypromold.com

[merrill.rosenow]

In Reply to John Moody:

Discussion of absolute accuracy should include the typical part size, no?

Yes and no, it has to do both with the size of the part, and the size of the smallest features you want to include with them. These features create small vertices and curves which affect part stability. We make sheet metal parts and use about 0.0025" (the smallest size typically available given our dimensions).