TesaStar touch trigger probes from Brown & Sharpe Tesa feature an adjustable measuring force to prevent inadvertent triggering when a long stylus is used.
Using the hexagonal wrench that is supplied, probe trigger force can be adjusted. Clockwise rotation increases the trigger force by 0.1 N to approximately 0.3 N. The probe force is preset to 0.11 N, based on using a stylus that is 0.82 " (21 mm) in length and is fitted with a 0.11" (3-mm) diameter ball tip.
Two configurations—the TesaStar and the TesaStar-I indexable touch trigger probe—are offered. The latter of the two is adjustable to 168 positions in 15-degree increments. The probe and the head are combined into a one unit for added durability, and the compact size increases the working volume of mid-sized CMMs, the company says.
Both models are designed to provide the efficiency of a motorized probe in a manual system and can be mounted on virtually any CMM. The probes can be rotated to an infinite number of positions for flexibility in measuring complex components, and they do not require specialized software, cabling, electronics or operator training.