We mainly used Raycus Fiber Laser Source on Fiber Laser Marking Machine, and if customer asked for biggest working area with the lowest power 20w, can we install it or not? The answer is yes, we can install it but when you marking on materials the result is not good because It’s large area that will make the laser power weak, also for 30w if choose working area 300*300mm the laser power will be weak when you need to do deep engraving, so you can do only surface marking.