Home/Technical Glossary/Closed Loop Resistance Welding Closed Loop Resistance Welding Closed-loop resistance welding power supplies use current and voltage feedback sensors to control the energy delivered to the parts. Closed-loop technologies provide many benefits for the resistance welding process including: Controlled Heating Rates Feedback Mode Options Repeatable Weld Heat Weld Monitoring Capabilities Process Tools Continuous Heating For more information, read our paper The Benefits of Closed-loop Control for the Resistance Welding Process