×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Specifying the location for a CMM

Specifying the location for a CMM

Specifying the location for a CMM

(OP)
I have been asked to specify the location of the CMM prob "touches" to reduce the variation due to non-consistant location/"touches" (IE Draft of plastic piece).

I am still a bit unsure how to really specify this.  They gave me an X & Y coordinate in one view.  Now how do I make this a "dimension?"  Is there a specific GD&T symbol?

I was looking over a book, and the best i could relate to is a Datum Target Area.  but i'm not terribly sure this is exactly what I need?

RE: Specifying the location for a CMM

Ryandias-

I would specify it in the drawing notes and then use flagnote symbols with reference dimensions to indicate the locations of the points to be probed.


John Nabors

"Against stupidity the very gods themselves contend in vain." - Friedrich von Schiller

RE: Specifying the location for a CMM

One cannot use datum targets since we are not setting up on a datum but reflecting the exact point on a surface where we will be taking the dimension.

I would probably reflect the contact points using phantom lines from the datums and basic dimensions. The contact points could be called a letter of some sort and the measuring information could be noted on the drawing.

Dave D.
www.qmsi.ca

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources