@gmeleks18 The Nano is the smaller board that plugs into the controller board, it's the processor and memory. The rest of the board is just routing for the stepper drivers and MOSFET, you don't need to replace it all.
i havent got a clue what you are talking about. grbl is what all eleksdraw, elekslaser, and eleksmill machines use. The nano is the only thing you can load anything on. The control board is just a way to direct that information out to the stepper drivers and servo. I think you have your terms all mixed up.
@schiffer-soft The problem isn't with Grbl, it is your laser isn't linear. So when it is supposed to be ramping power down due to PWM input it is not doing so. The calculation for M4 expects linear performance.
@nottingham82 Agree with all your points. Just add some personal experiences in order to help who starts in cutting plywood. Parameters involved:
laser power (of course, use max value) (I have 2.5W)
n. of passes (as stated by nottinghm82, 6 is a good starting point. I run tests using a 2 cm circle, most of the tools allow easily to do it)
plywood thickness (of course. Recently I have used 3 mm poplar)
plywood type (poplar is fine, even if different lots behave quite different. Birch required a lot of additional passes)
air assist is a key point
focusing point (it seemed to me that it is better to focus on the lower part of the plywood. Other experiences?)
Another interesting point: swapping speed and n. of passes?
I mean: doubling the speed and the n. of passes ensure the same cutting power?
In my experience, this improves a bit the burning of the wood. But this works within certain limits, speeds between 100 and 400 are sometimes ok. Other experiences, opinions?
Thanks for sharing