A Quality Digest reader wrote in asking for techniques to evaluate touch-trigger probes for accuracy. Specifically, he asked how someone can evaluate touch probes and magnetic modules for wear, or to determine if they have been damaged as the result of a collision or being dropped. He wanted to be able to recognize when to replace worn equipment when necessary, but also avoid replacing equipment that is still good. Finally, he asked how to do all this without specialized equipment or expertise.

Drawing on our many years of collective experience in application engineering and customer training, we'll tackle this question in this brief guide for the coordinate measuring machine (CMM) user.

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