Mfundo yogwirira ntchito ya weld positioner ndi yofanana ndi zida zonse zogwirira ntchito, kaya zazikulu kapena zazing'ono. Amapanga ndege yozungulira, yomwe imakhala yozungulira pansi. Mutha kuyika zida zazikulu pazoyika izi. Komabe, chowotcherera poyimitsa sichoposa tebulo lozungulira. Kuthekera kwake kumadalira malire a torque ya static. Imatha kuzungulira pa liwiro lalikulu ndi kulemera kwakukulu.1