Drive System Rx™ service is for users of existing variable-speed drive systems to achieve better reliability, productivity, and operation accuracy and flexibility, according to the company. This service includes drive system upgrades as well as preventive and predictive maintenance services. A typical upgrade may consist of replacing analog dc controls with digital dc controls. Preventive maintenance may include inspection, adjustment, maintenance, and evaluation of a system. Predictive maintenance measures may include thermographic, vibration, harmonics, and oil analysis to identify problems before they occur.