Originally intended to prevent two blanks from entering the roll former at once, the system is also an effective means of detecting and monitoring weld seams entering, as well. Transmitter and receiver probes monitor thickness. Depending on the control unit chosen, thickness parameters are either manually adjusted or selected with upper, nominal, and lower switching limits. Checking resistance welds is the specialty of Weld Checkers from Unitek Miyachi Corp . Preventive measures are then suggested.
Larger models feature data storage, statistical process information, and built-in printers.
The Metal-Lax Series 1700 is designed to relieve thermal stress within metal components. Nondestructive, subharmonic vibrations are used, and can be applied during welding to reduce distortion and cracking. The 1700's control console has LED indicator lights for diagnostic checks, and a digital timer. The ArcWorld II-616 welding system is engineered to have everything the welder needs to get the job done. It has also been redesigned with a more streamlined base, waist and arm, reducing areas of possible interference.