WELDING SYSTEM WITH TORQUE MOTOR WIRE DRIVE USING CALIBRATION DATA

摘要

A welding system for welding with wire (42) is disclosed that includes a torque motor (46) in a wire feeder (12) and a pull motor (54) in a welding torch (16). A wire feed speed may be set by an operator at a power supply or on a wire feeder (12). Based upon calibration of the pull motor (56) in the torch (16), upon startup of the welding operation, signals are provided to a pull motor (56) and the torch in an open loop manner with respect to the speed of the pull motor (56), while the torque motor (46) is driven to maintain a feed force on the welding wire (42) to ensure that the pull motor (56) has welding wire (42) available for feeding. No other coordination is required between the torque motor (46) and the pull motor (56).