- 32 -
6.3 Calibration
Verification
Calibration should be verified periodically depending on user requirements and systems usage,
and should be at least monthly. A calibration verification standard artifact is available from
Starrett authorized distributors or directly from the Starrett service department. Calibration should
also be verified after the system has been serviced or moved. The following is a brief description
of the steps recommended for the verification of your machine. Complete calibration and
verification procedures are available upon request.
Verification Standard Placement
Steps to validate calibration:
1.
Place the calibrated verification standard in one the six positions on the glass stage as shown
above. Secure the standard with hot melt glue or other suitable retaining method so that
stage translation can not move the standard under any condition.
2.
Skew the center of the two end circles. Please refer to the M3 manual for proper alignment
procedures.
3.
Measure the distance between the 1st and 2nd, 1st and 3rd, 1st and 4th, 1st and 5th, and the
1st and 6th fiducials. Repeat these measurements 10 times.
4.
Calculate the absolute average deviation for each of the 5 groups of distance measurements.
5.
Repeat the measurements for all six locations shown in the illustration.
6.
The absolute averages should be within the factory specification, de-rated for the
environment and calibration accuracy. See Table 1 - 5, “Travel, Accuracy and Resolution
Specifications” for accuracy specifications.
