## Defining Hard Probes

PC-DMIS CMM allows you also define a hard (or fixed) probe. While Touch-Trigger Probes (TTP) cause the CMM to report the position whenever the probe comes in contact with the part. A hard probe does not behave this way. Instead, a hard probe registers a hit whenever you press a button on the machine or arm or, in the case of scanning, when certain conditions are met (such as crossing a predefined zone, elapsed time, elapsed distance, and so forth).

Generally, these types of probes are used with PC-DMIS Portable. If you are using this type of probe, consult the "PC-DMIS Portable" documentation for information on calibrating and using this probe type.