Hi guys,

I have a fiber laser machine 3000W. While I am cutting thin sheets protective window lower side of cutting head is immediately burns. I am cutting:

Cutting Head: Raytools BM111 Series

Material: 1,5mm Mild Steel
Cutting Speed: 5000 mm/min
Cut Height: 1 mm
Gas Pressure: 1 bar
Focus Position: 0 mm
Duty Cycle: %35
Cut Power: %100

Can you help me please ?