Basics of Coordinate Metrology
Unit 7: Structure of Coordinate Measuring Machines - Stylus System

Digression
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 Start the animation using the start button and watch the difference between a measuring and a trigger stylus system:
   


Contact will open when touched: At this moment, the position of the stylus system is passed on to the computer.
  
This defines the moment of recording measuring points. The stylus system position and the deflection are passed on to the computer, which uses these data to calculate the probing point.