It seems we all pretty much have the chinese K40 or close variants of it. I am putting together a spreadsheet of power settings to keep track of what works and what doesnt work. To properly cut plexiglass I went through a good amount of it and made a nice little stack of scrap material before getting it right.
I will post it when I get some good content on it, right now I only have 3 or 4 entries… Meanwhile, if anyone has anything they would like to contribute to it, that would be great!
Essentially it has: (for power, I read it in volts since I put a volt meter on mine across the POT)
1/8" Plexi Speed 10mm/sec Power .61v Cut
1/4" Maple Speed 200 Power .83v Engrave
etc etc etc.