Spindle Error Analyzer (SEA)

Spindle Error Analyzer (SEA)

The Spindle Error Analyzer (SEA) measures and analyzes spindle error motions (dynamic and thermal) in accordance with ANSI/ASME, ISO, and JIS standards. These error motions create form errors in manufactured workpieces. The analysis is also useful in non-machine tool applications where spindle performance is a critical factor.

Form errors in manufactured parts are directly proportional to error motions of the spindle. How far away from the correct location is the cutting tool actually contacting the workpiece?

The Spindle Error Analyzer measures the motions of a spindle or rotating shaft at operating speeds. It then analyzes and reports error motions that decrease part quality. These measurements aid in troubleshooting, prevent unnecessary spindle rebuilds (a remarkably common occurrence), and result in increased part quality and decreased scrap.

The system includes:

  • High-resolution capacitive displacement sensors
  • Precision spherical or cylindrical targets
  • Robust sensor mounting hardware
  • Data acquisition components
  • Proprietary software for error motion analysis
Key Benefits for You
  • Predict and prevent part errors such as:
    • Surface finish
    • Feature location
    • Roundness
  • Qualify/Test machine performance before acceptance
  • Find root cause of machining errors
Find and eliminate spindle error motion sources
  • Out of round bearing components
  • Misaligned bearing seats
  • Bearing wear
  • Improper preload
  • Structural vibration
  • Inadequate stiffness
  • Resonant machine frequencies
Specific measurements required by international standards
  • Synchronous and Asynchronous measurements of
    • Radial error motion
    • Axial error motion
    • Total Indicator Reading (TIR, Runout)

See this excellent description of rotary axis error motions.

Compliant with international standards

  • ANSI/ASME Standard B5.54-2005, “Methods for Performance Evaluation of CNC Machining Centers”
  • ANSI/ASME B5.57-1998 “Methods for Performance Evaluation of CNC Turning Centers”
  • ANSI/ASME B89.3.4-2010, “Axes of Rotation, Methods for Specifying and Testing”
  • ISO230-3, Test Code for Machine Tools Part 3, “Determination of Thermal Effects”
  • ISO230-7, Test Code for Machine Tools Part 7, “Geometric Accuracy of Axes of Rotation “
  • JIS B 6190-7, Test Code for Machine Tools Part 7, “Geometric Accuracy of Axes of Rotation”
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