I did some cutting tests with aircraft plywood from local supplier and with some solid pine. Results are little bit puzzling. I hope someone could give me some tips. My K40 is pretty much stock. I replaced table with something that is more correct level and I also added (really underpowered) air as…

Hi Jansa, I had a similar result when I was cutting cast acrylic, anything over 30% either was the same depth or less up to 80%. I was cutting through 3 mm acrylic at 80% (15mA) @ 5 mm/s and then a few days later it couldn’t do it even after three passes. I found that my back mirror in the tube had …

Be aware that the potentiometer % values are completely off! Most machines reach the maximum recommended tube current (15-18mA) at max. 40-50% setting. If you use it with more power, the tube will degrade very quickly.

Looks like you are using a digital panel? If so adding a meter will give you more visibility to what is actually going on.

[image] cprezzi: Be aware that the potentiometer % values are completely off! Most machines reach the maximum recommended tube current (15-18mA) at max. 40-50% setting. If use use it with more power, the tube will degrade very quickly. I integrated this point, expanded to show how to calculat…

Power level has very little effect to cutting depth

Lasers

mcdanlj (Michael K Johnson) March 31, 2020, 11:43am 5

I integrated this point, expanded to show how to calculate it for other devices, into New to K40: Start Here

K40 Laser Beginner Insights draft document from FB K40 group