Angel investors from Southwest Florida participated in raising funds for ProAxion, a North Carolina-based company that monitors machine health using wireless sensors and provides diagnostic tools for manufacturers. Members of Naples-based Tamiami Angel Fund IV invested $398,000 in ProAxion, part of a growth capital raise that will help the company build capacity, develop products and build its sales team. The company installs sensors that measure vibrations and temperature on rotating machines in industrial plants. A machine-health dashboard uses the data to alert engineers when a small problem might lead to downtime and provides guidance on how to fix equipment.