Transcript Implementors Forum

Industrial Data Implementors Forum
Martin Hardwick
STEP Tools, Inc.
June 13, 2001
San Francisco, USA
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The BIG Issues
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STEP-NC Conformance Testing
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AP Interoperability
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Demonstrations
What to do
Unified PDM Schema
Modularity
Upwards Compatibility
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Changes in Progress
Part 21 Amendment – Multiple Data Sections
Short names
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Solid Model History
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STEP and XML
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What to do
2
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
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CAM Conformance Test
Test
Spec
CAM data
CAD
Test Case
STEP NC
Checker
CAM
Test
Spec
Geometry
STEP NC
Solid model
comparison
CAD
NC
verification
Solid
Model
G codes
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
5
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?
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Measuring XML
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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
– [email protected]
– [email protected]
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Request the Part 28 teams translate to
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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
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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
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