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CMM Calibration

The main function of a Coordinate Measuring Machine (CMM) is measurement of the physical geometrical characteristics of objects. Periodic CMM calibration ensures that the machine reports accurate dimensional measurements when in use.

A CMM is a device often used in product development, manufacturing or assembly processes to inspect a part or assembly against design drawings or production plans. CMMs can be programmed to repeatedly measure identical parts, thus providing an efficient form of inspection for large volume items. Repeat usage and environmental conditions can cause the system to become inaccurate over time and require CMM calibration services.

Ask Us About CMM Calibration

The field team at LTI Metrology, near Philadelphia, PA, provides on-site calibration services to verify your equipment for ongoing accuracy. Our qualifications let you know you are working with a quality laboratory:

  • NIST traceability
  • A2LA accreditation to ISO/IEC 17025
  • Calibration performed in accordance with ISO 9001-2000, ISO 10012-1 ANSI/NCSL Z540 and other requirements

During CMM calibration services, you can expect nothing but the best as the skilled field technicians complete the following:

  • Thoroughly clean and inspect the scales, drive, guideways, probe, hardware and electronic systems
  • Run both before and after data (as found, as left) which is reported on your Calibration Certificate
  • Use the latest CMM calibration methods in accordance with customer and/or manufacturer specifications, including the following:
    • Inspect linearity (X, Y and Z Axis)
    • Inspect perpendicularity (XY, ZX, and ZY planes)
    • Inspect beam / plate parallelism
    • Perform full volumetric ball bar performance test per ASME B89.4.1
    • Check repeatability (X, Y and Z Axis)
    • Replace stylus and touch probes

LTI Metrology Capabilities

  • Calibrating most CMM makes and models
    • Gantry, Cantilever, Bridge and Column.
    • Manual or Direct Computer Control (DCC)
  • NIST traceability
  • A2LA accreditation to ANSI/ISO/IEC 17025

The CMM Calibration Process

Measurements are taken by a probe attached to a manual or computer-controlled moving axis. By precisely recording the X, Y, and Z coordinates of the target, points are generated which can then be analyzed using regression algorithms for the construction of features.