Fiber Bragg grating sensors have attracted considerable attention for measurement applications due to their greatly reduced size, low weight, and immunity to electromagnetic interference in comparison with traditional sensing methods. Dynamic measurement of industrial machine tools is useful for gauging surface accuracy, monitoring tool condition, and predicting process stability, but requires a robust sensing scheme. The small size and high natural frequencies of micro machining tools coupled with a harsh manufacturing environment can render traditional sensors ineffective. This work presents a new method for measuring tool motion with fiber Bragg grating strain sensors. The feasibility of the sensing scheme is first demonstrated with a simple bench-top cantilever beam experiment. Then, a method for potting the sensors in the through coolant holes of a 1/8″ carbide end mill with a high-viscosity gap-filling cyanoacrylate is demonstrated. Comparative structural analysis tests demonstrate the effectiveness of the sensors. Measurements of tool motion during cutting are presented. Finally, methods of noise reduction and improving signal accuracy are discussed.

Original languageEnglish
Pages (from-to)21-31
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2003
EventSixth Pacific Northwest Fiber Optic Sensor Workshop - Troutdale, OR, United States
Duration: May 14 2003May 15 2003


  • Bragg gratings
  • Dynamics
  • Machining
  • Micro
  • Sensors
  • Vibrations


Dive into the research topics of 'Fiber Bragg Grating Sensors for Dynamic Machining Applications'. Together they form a unique fingerprint.

Cite this