CNC-022

Pack: B_CNC Severity: major

Surface finish Ra very low on large area → time/cost

Rule Card

Field	Value
Pack	B_CNC — CNC Machining DFM
Title	Surface finish Ra very low on large area → time/cost
Severity	major
Check logic	Hybrid
Applies to	CAD part
Inputs required	manual_context
Fix template	Adjust geometry/process for machine capability and setup risk.

Short Description

Surface finish Ra very low on large area → time/cost; suggest selective finishing

When It Applies

This rule runs when the selected or auto-classified manufacturing route activates B_CNC. It targets CAD part.

Evidence Profile

Input	Category
manual_context	Manual context

References

Reference	Type	Title
REF-GPS-5	standard	ISO 21920-1: Surface texture profile method
REF-CNC-2	guide	Protolabs CNC milling design guidelines

Sources

• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\manifest.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\rule_library.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\references.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\process_classifier.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\overlays.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\roles.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\report_templates.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\ui_bindings.json