Welcome to MCAD Central

Join our MCAD Central community forums, the largest resource for MCAD (Mechanical Computer-Aided Design) professionals, including files, forums, jobs, articles, calendar, and more.

Register Log in

Geotol

phoxeoy

New member
I have a model that has a Circular Runout Geo tol. Below and connected
to the Geo tol it has a Projected Tolerance zone with a height of 85mm.
I go to create this Geo tol and Pro/E will not let me add a projected
tolerance zone to a circular runout. HELP!! I don't know what to do
here.
 

lbotez

New member
Projected tolerance zonefor runout?! I might be wrong, but that is an illegal callout.


How would you interpret such a tolerace?
 

phoxeoy

New member
All I know is they are calling a circular runout on a thread with a Projected Zone just below it. I run into this all the time with these old prints. My problem is I know something is wrong but what I don't knowis the road to take.


Does anybody know why a Projected Tolerance zone on the Circular runout GEOTOL is wrong. I need some ammo before I go to the bosses.


Thanks
 

dr_gallup

Moderator
Circular Runout is measured by putting an indicator on the surface and revolving the part around the datum axis. How are you going to put an indicator on a projected zone? Projected tolerance zone is specifically forbidden for a circular runout gtol. To my knowledge, projected tolerance zones are ONLY used for true position GTOL.

I have a great book titled Geometric Dimensioning and Tolerancing Self-Study Workbook 2nd Edition based on ASME Y14.5M-1994 by Alex Krulikowski. I have had it a long time, don't know if it is still available. The best part is it has a block diagram for each type of GTOL listing all the options, modifiers, etc. and what is allowed & what is forbidden. Follow the block diagram through and you are sure to have a valid GTOL.
Edited by: dr_gallup
 

Sponsor

Top