Hi ,
I am new to lasers having bought my second hand Rayjet 30W earlier this year. I have engraved 80 SS bottle openers with text and a line graphic using Cermark LMM6000 paste brushed on using a foam brush and I was very pleased with the results. The mark is durable and the detail is good. Recently I have tried marking SS using Cermark on logos with fills and I have noticed banding in the final product. I carried out a power grid test looking for the best result with power and speed and it was close to the default setting. The process I have used is vector graphic in coreldrawX6 fill 100% RGB black, Power 100% speed 14% ordered dithered and I use either 600 or 1000dpi. Have also tried black and white instead of ordered dithered using the Rayjet commander software. Ran another test last night at higher speed as it still shows the banding and I am not concerned with the durability on this test piece as I would like to identify the banding issue. I tried plugging the Rayjet 30 into a different power point separate from the Atmos unit, banding still present. I then rotated the piece of stainless 90 degrees and engraved the flag logo and the banding appears to have gone from the bottom RH flag ( this flag was engraved with test piece rotated 90 degrees counter clockwise ). I do not know why the banding is very noticeable if I engrave in landscape but be seem to disappear if the flag is engraved in portrait mode ?. The flag size on this test piece is small just under 1.5 inches wide. . Have engraved durablack and granite using photographs and there is no banding evident when engraving these. Any ideas what I can try ?. Thanks for your input, Bernie
Banding.jpg