When should I use the FRTZF tolerance frame?
When should I use the FRTZF tolerance frame?
(OP)
Hello,
I'm fairly new to G,D and T and I am trying to incorporate the principles in the drawings I make. I understand how composite frames work and how PLTZF and FRTZF tolerance zones are constructed. However, I am yet to see a practical example when I might want to use the FRTZF tolerance frame. The examples where I have used it so far for locating bolt patterns, I can make do with just the PLTZF tolerance zone. Are there any examples out there that I can refer to for this?
Thanks!
Sid
I'm fairly new to G,D and T and I am trying to incorporate the principles in the drawings I make. I understand how composite frames work and how PLTZF and FRTZF tolerance zones are constructed. However, I am yet to see a practical example when I might want to use the FRTZF tolerance frame. The examples where I have used it so far for locating bolt patterns, I can make do with just the PLTZF tolerance zone. Are there any examples out there that I can refer to for this?
Thanks!
Sid





RE: When should I use the FRTZF tolerance frame?
http://www.tec-ease.com/gdt-tips.php; --there are some examples here.
http://www.tec-ease.com/gdt-tips.php
Composite
Datum Feature References
Second Segment
Using a Note Video!
Several Examples Video!
Feature to Feature Control Video!
Composite l Video!
Composite ll Video!
Composite lll Video!
Composite l Gage Video!
Composite ll Gage Video!
Composite lll Gage Video!
Also the standard itself (2009)could be an excellent source of examples for what you are looking for.
RE: When should I use the FRTZF tolerance frame?
If I want to control the location of those holes on the wall, the overall position isn't terribly critical. I could perhaps give you a half-inch position tolerance of the holes as measured from the corner of the room. But now zoom in locally on the holes that make up the outlet: the hole-to-hole locations have to be way better than a half-inch in order for a plug to fit! Those hole-to-hole tolerances might only be allowed .080 inch.
Result -- the PLTZF would be my overall tolerance within the room: .500 for each hole with respect to datums A, B, C. But the FRTZF would be the local tolerance: .080 for each hole while only looking at datum A (the plane of the wall itself).
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: When should I use the FRTZF tolerance frame?
Also the FRTZF should have a primary datum feature to limit the horizotal hole alignment ( the shelve should be usable and the goods place on it should not rollover/ fall from it).