Industrial Data Implementors Forum

1
Industrial Data Implementors Forum

• Martin Hardwick
• STEP Tools, Inc.
• June 13, 2001
• San Francisco, USA

2
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

3
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 dont 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

4
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
5
CNC Conformance Testing
STEP NC

• 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

6
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?

7
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_at_steptools.com
• xmlsc4_at_nist.gov
• Request the Part 28 teams translate to
• LB
• OSEB
• ETEB
• Other
• Will post results to implementors forum web site
• Will measure file size
• Want suggestions for other meaningful measures
• Will gather and discuss at next SC4 meeting

8
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