... wds-620 1.with CCD camera, 2.optical vision system 3.touch screen 4.can repair most bga chip Main Feature: 1. Adopt ... , slope, cooling, alarming all can be displayed on the touch screen. 3. High-precision K-type thermocouple with closed loop control, PID ... the welding effect; 13. human-machine interface, high-definition touch screen(Taiwan), PLC control, password protection and calibrate function, can ...