Controlling Position of Features

What is Position Control?

Position Control is essential knowledge for designing CNC machined parts. Datum structure, GD&T.

Key Principles

  • Understand manufacturing constraints
  • Design for cost-effectiveness
  • Consider material properties
  • Plan for quality inspection

Best Practices

CMM inspection.

  • Communicate early with your machining partner
  • Use standard features and sizes
  • Specify tolerances only where critical
  • Consider secondary operations

Common Mistakes to Avoid

  • Overly tight tolerances
  • Unnecessary complexity
  • Ignoring tool access
  • Poor datum selection

Why Follow These Guidelines?

Following Position Control guidelines helps you:

  • ✅ Reduce manufacturing costs
  • ✅ Improve part quality
  • ✅ Shorten lead times
  • ✅ Avoid redesign iterations

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