1.1 Disassembly of Protection Window
① Pull out the protection window drawer from the welding head body, remove it to clean and dust-free environment, and seal the head body at the same time.
1.2 Cleaning of Protection Window
① Available tools: dust-free wiping swabs, isopropyl alcohol and rubber air blow.
② Spray isopropyl alcohol onto the dust-free wiping swabs.
③ Gently pinch both sides of the lens with the left thumb and index finger.
④ Hold the wiping swabs with right hand to gently wipe both sides of the lens in a single direction from bottom to top or from left to right, and blow the lens surface with the rubber air blow to confirm that there is no foreign matters on the cleansed lens surface.
Parameters：
| Diameter/ Thickness(mm) | Welding Head |
| Φ18*2mm | CQWY |
| Φ20*2mm | QINLIN |
| Φ20*3mm | Ospri/Au3 Tech |
| Φ20*4mm | HANWEI |
| Φ18*2mm | WSX |
| Φ25*1.5mm | KRD |
| Φ25*2mm | |
| Φ25.4*4mm | Raytools |
