Sigmetrix powers new Tolerance Analysis capabilities in PTC Creo

Published 14 January 2020

Posted by Stephen Holmes

Article tagged with: cad, simulation, ptc, tech, creo, sigmetrix

A new tolerance analysis extension from Sigmetrix has been launched for use within PTC’s Creo CAD software.

Currently available in both Creo 4.0 M110 and Creo, Creo EZ Tolerance Analysis Extension (EZTA) will enable engineers to perform one dimensional tolerance stack-up analyses directly in the Creo environment.

Creo EZTA allows users to import analyses defined in the Tolerance Analysis Extension (TAE) and present the results in the Summary Table and Report functions of Creo.

Beginning with PTC Creo 7.0, the new Creo EZTA will be the only 1D tolerance analysis tool available within Creo.

The Tolerance Analysis Extension will no longer be available, but any legacy TAE data within the CAD model files will still be importable into Creo EZTA Extension.

“Companies are under ever-increasing pressure to improve quality, shorten time-to-market, and reduce product costs,” said Sigmetrix president James Stoddard at the launch of the software.

“To meet the challenge, engineers must focus on the details of the design using tolerance analysis tools to identify the critical part-level tolerances that will result in products that are easily assembled and perform as required.

“Often engineers want to perform quick 1D stack-ups on the fly while designing and we feel EZ Tolerance Analysis will help to fill that need for Creo users,” stated James Stoddard, President of Sigmetrix.”

Sigmetrix advises that the remaining maintenance releases for the two versions of Creo that will contain EZ Tolerance Analysis, 4.0 M110 and, will contain both EZTA and TAE, enabling customers to migrate data from the old tool to the new one.


Sigmetrix lists the key features in EZTA as follows:
Modern UI, optimised to simplify definition
Interactive visualization of tolerance loop
Feature-based instead of dimension-based
Easily selectable biasing of pin/hole joints
Graphical display of results
Easy identification of contributing tolerances using statistical and worst-case contribution
Automatic creation of HTML report, which includes a comprehensive overview of all stackups defined as well as details for each stackup, including:
image showing dimension loop
detailed table showing all dimensions and tolerances
graph of the results including quality metrics for statistically derived results
graph of largest to smallest contributors to the overall variation


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