Engineering Talk - DCS's Blog on Quality and Engineering

How to Design and Optimize Datums in 3DCS Tolerance Analysis Software

Datum Design and Optimization in 3DCS Tolerance Analysis Software

Datum design and optimization is the most important step in any assembly quality control process which can be simplified by evaluating the geometric factors and concerned variations.

DCS has already covered creating Datums in the CAD platforms - CATIA, NX and CREO, but what about verifying those Datums and optimizing them? 

Topics: 3DCS Creo Siemens NX PTC Creo DE Focus Tolerance Analysis CATIA 3DCS

The New DCS Community - FAQ's and Discussion on Tolerance Analysis and SPC

The New DCS Community Brings Customers and Clients a Forum for Questions, Answers and Information on Tolerance Analysis and SPC

The New DCS Community houses an extensive FAQ, with clients able to post questions to be answered by DCS technical experts and DCS Software partners and users. 

Topics: Tolerance Analysis 3DCS SPC DE Focus T&T Webinar QDM

SOVA - Stream of Variation Analysis System for Multistage Manufacturing Processes

SOVA - Stream of Variation Analysis System for Multistage Manufacturing Processes

This piece is based on the work done by DCS Dimensional Control Systems in cooperation with Dr. Jianjun (Jan) Shi at the University of Michigan and Drs. Darek Ceglarek and Shiyu Zhou at the University of Wisconsin - Madison, with the support of a two million dollar grant from the Advanced Technology Program of the National Institute of Standards and Technology.

SOVA is a method of applying variation analysis as part of the design and manufacturing process to drive robust design in order to reduce costs in manufacturing. 

Developed in the late 90's and early 2000's and documented in the book "Stream of Variation Modeling and Analysis for Multistage Manufacturing Processes" (Jianjun Shi, 2006, CRC Press, ISBN 1420003909), it forms a basis for many of the programs DCS provides for customers and is similar to many process established by leading manufacturers in the automotive and aerospace industries.

 

Topics: 3DCS 3DCS Creo CATIA CATIA V6 DE Focus Siemens NX PTC Creo Tolerance Analysis

Vector Loop Analysis and Stream of Variation Analysis - SOVA

What are Some Methods of Variation Analysis?

There are a number of different methods developed to both describe variation on models and drawings, as well as analyze and control the impact of that variation. 

In a typical assembly process, dimensional variation is affected by tolerances (including component and operationinduced tolerances) and operations. Tolerance Analysis is focused on tolerances and assumes operations are known. Dimensional Variation Analysis analyzes both tolerances and operations. For example, operation sequence or operation type is an analysis topic for Dimensional Variation Analysis.

Topics: 3DCS 3DCS Creo CATIA CATIA V6 DE Focus PTC Creo Siemens NX Tolerance Analysis Webinar

New DE Compendiums Available - Quickly Access the Latest Dimensional Engineering Articles

Get the Latest Articles on Dimensional Management

Quickly get access to the latest articles on Dimensional Management with these eBook collections

Now available on the DCS Community, the DE Focus article series highlights useful features and functions in 3DCS, as well as discussing strategy, dimensional management and GD&T. 

Topics: DE Focus 3DCS

How to Use Confidence Interval to Improve Dimensional Analysis Part 3

Where Is DCS Getting These Numbers?

How do you know your results are accurate? Here are some methods of calculating your Confidence Interval

Dimensional Control Systems 3DCS® is a variation analysis tool that uses Monte Carlo simulation to predict the results of a set of measurements [Dimensional Engineering News, June 2009]. After a variation model is built in 3DCS®, a Monte Carlo simulation can be performed to provide the following statistics:

Descriptive statistics - calculations made directly from the sample data such as mean, minimum, maximum, standard deviation, percentage out-of-spec, confidence intervals, etc.

Inferential statistics – estimations based on a curve-fitting algorithm such as estimated low, estimated high, estimated percentage out-of-spec, etc.

Topics: 3DCS T&T DE Focus

Datum Design Principles in 3DCS

Topics: 3DCS DE Focus

Dimensional Engineering - Datums are Important

Dimensional Engineering – Datums are Important

Topics: 3DCS DE Focus