The Elsmar Cove Business Standards Discussion Forums More Free Files Forum Discussion Thread Post Attachments Listing Elsmar Cove Discussion Forums Main Page
Welcome to what was The Original Cayman Cove Forums!
This thread is carried over and continued in the Current Elsmar Cove Forums

Search the Elsmar Cove!

Wooden Line
This is a "Frozen" Legacy Forum.
Most links on this page do NOT work.
Discussions since 2001 are HERE

Owl Line
The New Elsmar Cove Forums   The New Elsmar Cove Forums
  Measurement, Test and Calibration
  R&R studies for Automatic equipment

Post New Topic  Post A Reply
profile | register | preferences | faq | search

UBBFriend: Email This Page to Someone! next newest topic | next oldest topic
Author Topic:   R&R studies for Automatic equipment
posted 16 February 2000 12:34 PM           Edit/Delete Message   Reply w/Quote
I am currently using R&R studies recommended in the MSA manual for both automatic and manual gauges. However I have recently been told that I should be using Type 1 studies for automatic gauges and type 2 for manual gauges. The MSA manual makes no refrence to this, can anyone shed any light on the subject?


Rob Nicholl

IP: Logged

Jerry Eldred
Forum Wizard

Posts: 136
Registered: Dec 1999

posted 16 February 2000 02:38 PM     Click Here to See the Profile for Jerry Eldred   Click Here to Email Jerry Eldred     Edit/Delete Message   Reply w/Quote
I am not an MSA guru. I am not familier with Type 1 or Type 2 testing. In my company we do, however, have the issue of automatic versus manual gages (or measurement systems). In the case of automatice gages, our practice is that the operator is not a variable (as the tool is automated, the operator plays no part in measurement variation). So repeatability is done the same way whether manual or automatice. But reproducibility on automatic eqiupment is not between operators, but between shifts or days or equipment shut downs. Rather than multiple operators, the reproducibility portion would include sets of measurements taken on different shifts, or different times of day, etc.


IP: Logged

Forum Contributor

Posts: 11
Registered: Feb 2000

posted 16 February 2000 03:00 PM     Click Here to See the Profile for mbruner   Click Here to Email mbruner     Edit/Delete Message   Reply w/Quote
I have not heard of type 1, type 2 in reference to GRR studies. The MSA manual specifically states that reproducibility is variation in the average measurements made by different appraisers. It also states there are some measurement systems where the reproducibility is considered negligible.We have interpreted this by doing a GRR study with one appraiser (a GR study if you will)for our automated equip. It kind of makes sense but I can't help that.

IP: Logged

Forum Contributor

Posts: 111
From:Kane, PA 16735

posted 27 February 2000 09:06 PM     Click Here to See the Profile for Batman   Click Here to Email Batman     Edit/Delete Message   Reply w/Quote
Yes, with "automatic" measurement equipment you usually only determine repeatability.

However, be sure there is no operator influence available. If the "automatic" device requires different operators to "fixture" parts - as in a laser micrometer, CMM or Vision type system, or the operators must set-up and standardize a device prior to measuring parts, it should be considered that there are other potential sources of variation.

IP: Logged

All times are Eastern Standard Time (USA)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply Hop to:

Contact Us | The Elsmar Cove Home Page

Your Input Into These Forums Is Appreciated! Thanks!

Main Site Search
Y'All Come Back Now, Ya Hear?
Powered by FreeBSD!Made With A Mac!Powered by Apache!