Orientation of hole pattern relative to a slot
Orientation of hole pattern relative to a slot
(OP)
Ringman,
How is orientation of a pattern accomplished when you have plane say A, a cylinder say B, and a slot,say C running the length or a portion of the length. C being the tertiary and used for orientation, FCF [A B C] I have aome problems, anyone else?
I used to think that orientation was to a point.
Thanks
How is orientation of a pattern accomplished when you have plane say A, a cylinder say B, and a slot,say C running the length or a portion of the length. C being the tertiary and used for orientation, FCF [A B C] I have aome problems, anyone else?
I used to think that orientation was to a point.
Thanks





RE: Orientation of hole pattern relative to a slot
Powerhound, GDTP T-0419
Production Supervisor
Inventor 2008
Mastercam X2
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II
RE: Orientation of hole pattern relative to a slot
Used all the time in auto console hinges and brackets.
http://www.EsoxRepublic.com-SolidWorks API VB programming help
RE: Orientation of hole pattern relative to a slot
Both secondary and tertiary datums could either be at MMC or RFS. If the positional tolerances are at RFS, then your secondary and tertiary datums should also be at RFS otherwise one cannot check it.
Dave D.
www.qmsi.ca
RE: Orientation of hole pattern relative to a slot
RE: Orientation of hole pattern relative to a slot
A problem that I have with your explanation is that the pin you refer to for datum simulator C, would have an axis as the 'true geometric counterpart'. A plane or line cannot in my opinion be oriented to an axis or line in theory.
Furthermore, if the slot is expressed as the datum feature, the datum would be the centerplane of the slot, and not an axis.
RE: Orientation of hole pattern relative to a slot
Ray Doyle
SolidWorks 99-07
RE: Orientation of hole pattern relative to a slot
Powerhound, GDTP T-0419
Production Supervisor
Inventor 2008
Mastercam X2
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II
RE: Orientation of hole pattern relative to a slot
Your explanation illustrates my concern. You are using the midpoint of the slot as the datum rather than the mid plane as would be the case if the width is expressed as the datum feature.
Is there a way that your sample can be scaled up? I am unable to make out some of the details on the dwg.
RE: Orientation of hole pattern relative to a slot
His drawing is clearly indicating the centerplane of the slot as the tertiary datum. The width of the slot has a FCF that positions it WRT A and B and there is a datum feature indicator attached to the FCF which makes it datum C. This makes the centerplane datum C.
Powerhound, GDTP T-0419
Production Supervisor
Inventor 2008
Mastercam X2
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II