Hey folks. I received my 3d Mini a week ago or so and everything worked fine until today. I noticed that I was loosing power and saw that when I increased the power on the laser to 99.9% is was a very unfocused beam as indicated by wide cut lines. Then all of a sudden the laser would not connect to Lightburn.
I found that the sd card was not working and it would not open on my computer. At this time all I had was a solid Red light on the board. I downloaded the firmware and config file from cohesion3d and put it on a new sd card. The board booted up but now the laser will not respond to movement from Lightburn and everytime I attempt to boot up the laser the computer says that I have to format the sd card (which I have twice). So board boots up with lights as they should be but no movement from the laser.
I think I messed up checking the voltages. They appear fine on 2nd try. I hooked up the original board and everything works. So, no movement on the 3d Mini board.
New memory card, format FAT32, put files on, check again. A separate 24v PSU will help tremendously as the 24 volts coming out of the stock psu is very unstable and noisy.
Yeah, the stock k40 setup is great for doing these sorts of things. 24v PSU and also the NOMSD firmware build cut down on this substantially. (Jim Fong post in Cohesion3D group)