Solution - Constant Heat Control Algorithm

CHC is a new approach to controlling resistance welding

Instead of programming current into the welding schedule, "Constant Heat Control (CHC)" algorithm seeks to maintain total weld heat under control. Heat is the product of resistance, weld time, and the square of weld current. The control needs to discriminate the heat produced during welding and that which is lost in the inefficiencies of the secondary.

The welding control can monitor heat developed between the electrodes and evaluate if sufficient heat has been applied to melt the metals to develop an acceptable weld nugget. The control is equipped with voltage sensing at the electrodes and current monitoring. The value of these parameters plus the time of current draw will measure "Heat" provided to the welding zone.