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Industrial Data Implementors Forum. Martin Hardwick STEP Tools, Inc. June 13, 2001 San Francisco, USA. The BIG Issues. STEP-NC Conformance Testing Demonstrations What to do AP Interoperability Unified PDM Schema Modularity Upwards Compatibility Changes in Progress

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industrial data implementors forum

Industrial Data Implementors Forum

Martin Hardwick

STEP Tools, Inc.

June 13, 2001

San Francisco, USA

the big issues
The BIG Issues
  • STEP-NC Conformance Testing
    • Demonstrations
    • What to do
  • AP Interoperability
    • Unified PDM Schema
    • Modularity
  • Upwards Compatibility
    • Changes in Progress
    • Part 21 Amendment – Multiple Data Sections
    • Short names
  • Solid Model History
  • STEP and XML
    • What to do
step nc conformance testing
STEP-NC Conformance Testing
  • First goal is to select Usage Scenarios
  • Realism vs formal test cases
    • Formal test cases can seem simplistic to management (we don’t’ make that)
  • CAM conformance
    • Check that CAM system can create valid part program to make the part on a reference machine
    • Also translate to ISO 6983 for software verification
cam conformance test
CAM Conformance Test

Test

Spec

CAM data

Test Case

STEP NC Checker

CAM

CAD

Test

Spec

Geometry

STEP NC

G codes

Solid model comparison

NCverification

CAD

Solid

Model

cnc conformance testing
CNC Conformance Testing
  • Is the part machined correctly for the given input?
  • Standard artifact can be provided; CAD files and drawings may suffice
  • Additionally, a suite of STEP NC files can be provided that test exceptions that should be caught by the CNC
    • ISO 10303/21 syntax errors
    • STEP NC data structure errors
    • Bad data or “Widow maker” files

STEP NC

pdm issues
PDM Issues
  • How to replace PDM Schema with 60 PDM modules?
    • Rules for short to long form generation may be vague
    • Is data exchange between different module subsets meaningful?
measuring xml
Measuring XML
  • AP-203 Part 21 file for a conic (or other simple shape)
  • PDM Schema file for a simple assembly
  • Will send schemas and data to
    • step-imp@steptools.com
    • xmlsc4@nist.gov
  • Request the Part 28 teams translate to
    • LB
    • OSEB
    • ETEB
    • Other
  • Will post results to implementor’s forum web site
  • Will measure file size
  • Want suggestions for other meaningful measures
    • Will gather and discuss at next SC4 meeting
parametrics and construction history
Parametrics and Construction History
  • Parametrics integrated resource (Part 108) nearly ready for CD
  • Construction History Test case being implemented
  • Part 108 Constraints need to be added to test case
  • Small number of design features models have been developed for the test part (Lblock part)
  • Need resources to develop additional design feature models
  • Implementors Guide for Construction History expected to be circulated shortly