Flagnoting every print dimension - bad drafting practice?

[McLeod]

Some of our manufacturing and inspection staff are requesting that all prints in the company have every single attribute (dimension, note requirement, etc.) individually and sequentially labeled with flagnotes, so that they are more friendly to their inspection forms. Instinctively, the drafters, designers, and engineers in product development know that this is a Bad Thing, primarily because of the resulting clutter on the drawing and the inevitable revision nightmares. But are there any particular parts of ASME Y14 which directly or indirectly preclude such madness? I've been all over it and can't find anything which specifically addresses the rampant over-use of flagnotes or similar topic. Has anyone seen this put into practice? What were the engineers smoking when they agreed to it?

 

[Umhoefer]

In my field "ballooning" of a drawing is common practice. Every attribute is identified and compared to the actual part. It is also how we identify all SPC dimensions making it easier for the inspectors to find and measure the correct feature. This practice causes very little clutter and makes comunication alot more precise verses calling out a general area.

 

[Gianfranco]

Hi Umhoefer,

Thanks! I fully agree with you.
Your savvy do hope myself for the better future!

May you repeat your answer at thread404-16033?

Thanks again.

Gianfranco


PS. McLeod, you have open a lot of threads on the same subject. Now, could you summarize the answers given on others threads on thread404-16033?

 

[Umhoefer]

Gianfranco,
It's good to see someone agrees with me. However it should be noted that I do also feel that if you can make simpler prints that only show the needed dimensions by all means this is the way to go. An inspector should have the easiest work instruction possible for a given job, as to avoid confusion and mistakes. I often will make simplified drawings (minimal dimensions)for use by the floor inspectors. The only negative aspect is when you have a revision change you need to reballoon and update all of the diferent versions. I found the creation of a simple database to be the solution to keep track of the number of related drawings and there location. As well as the training of a lead inspector to reballoon the prints for me.