Miyachi Unitek Corp. (www.miyachiunitek.com) has released an inverter resistance welding control with closed-loop feedback, five feedback modes and built-in monitoring that the company says boosts weld quality and welding productivity. In addition, the manufacturer says the ISA-2000CR delivers more than 100,000 amps of welding current and feeds back data at a rate of 1,000 times per second. The company also says the control adjusts for variations, such as high-oxide surface conditions of the parts to be welded. Operators can set upper and lower limits for current, voltage, power and time, and the unit alerts them when limits are exceeded.