General tolerances
General tolerances
(OP)
Can I specify general tolerances variably to A-B-C? Like Surface Profiles | 2| A | 4 | B |8 | C where allsurfaces are +/-1 to A - +/-2 to B and +/-4 to C.
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RE: General tolerances
To get what you want, you'd have to chop it into three separate feature control frames (although there'd be other issues in that about relating the datum features to each other in this separated format).
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
http://www.gdtseminars.com
RE: General tolerances
0 to 150mm = +/-1.5mm
151 to 250 = +/-2.5mm
250 and above = +/-1%
If I have part that is flat and sort of narrow but quite long - I don't want to have to use the largest possible tolerance as the general tolerance because there are alot of dims that will need to be tighter. And I don't want to call out every dim.
RE: General tolerances
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com
RE: General tolerances
Plus, isn't the general tolerance meant to apply to displayed dimensions anyway? Or are they meant for unstated lengths of material?
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
http://www.gdtseminars.com
RE: General tolerances
RE: General tolerances
RE: General tolerances
RE: General tolerances
:)
RE: General tolerances
If the tolerances are variable, then they are not "general tolerances".
Chris
SolidWorks 11
ctopher's home
SolidWorks Legion
RE: General tolerances
THE CAD MODEL IS BASIC
EVERY DIMENSION YOU CAN POSSIBLY MEASURE
IS SUBJECT TO +/-3% VARIATION (NON-ACCUMULATIVE)
RE: General tolerances
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com
RE: General tolerances
And there is no reason that tolerances have to be a fixed distance.
If within 1% of nominal is what you need, then there is no reason to not specify tolerances as +/- 1%.
RE: General tolerances
John Acosta, GDTP S-0731
Engineering Technician
Inventor 2013
Mastercam X6
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II
RE: General tolerances
You always break these GD&T questions down to a simple logical solution. Just a quick aknowledgemenet of your skill, so when I come uo with a GD&T dilema, you will feel compelled to help.
- CJ