What is a common method used to check machine calibration?

Using a laser measurement system is a common and effective method to check machine calibration due to its precision and accuracy. This method involves utilizing laser beams to measure distances or alignments with very high precision, ensuring that the machine's components are set correctly according to specified tolerances. Laser measurement systems can provide immediate feedback on calibration settings, allowing operators to make adjustments as needed to achieve optimal performance.

In contrast, visual inspections may not catch subtle misalignments or errors that could affect machine accuracy, and they often rely on the operator's experience and perception. Listening for unusual sounds can indicate problems but is not a reliable method for systematic calibration. Taking photos of the machine setup can be useful for documentation or comparison but does not provide the specific measurements needed for calibration checks. Therefore, the use of a laser measurement system stands out as the most reliable technique for ensuring that machines are calibrated correctly.