The probe head is an important part of the coordinate measuring machine(CMM), which plays an important role in the application of the CMM. The probe head can be divided into two types: scanning head and trigger head, and the current CMM uses the most of the trigger head.
1. The initial volume of the trigger head is smaller when the measurement space is narrow.
2. The part is concerned with dimensions (such as small thread bottom holes), spacing or position, without emphasizing its shape error (such as locating pin holes);
Because of the mechanical industry need to measure a large number of geometrical quantity, concern is only part of the work-piece size and location, so most of the CMM on the market at present still use touch trigger probe, especially the medium accuracy machine.
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