OK guys first off i want to apologize for my ignorance here. I'm a Master Mechanic of 30 years with some engineering schooling 25 years ago but i am totally ignorant of what i am doing here and i need help. So basically i'm a dumb redneck and cannot understand whats going on.
I've searched the interweb for 4 days now trying to find a solution but what i read confuses me even more. It's like another language to me.
I have a Anycubic printer that runs the Mega 2560 board and the people at Anycubic are NO HELP at all!
The problem i have is that i can start a print and it works fine but at random times during the print it just stops and the whole thing resets itself.
Now i do have another problem with loading new firmware too. It says it uploads correctly but the parameters i change don't actually change.
I can live with that as eventually they do change it's just a pain in the Arse.
What i've tried is this.
I thought it was a power supply problem so i have tried 3 different power supply's. 2 new ones and the one that is on my Prusa printer.
So next i thought it might be a heat issue, so i lifted the unit off the table and placed a fan to circulate alot of air aound the board.
i thought maybe it was a gcode issue so i changed the parameters around (in simplify3d) to print slower and i tried faster.
On a cold start the printer will print for about 20 minutes but after that it will only print about 3 to 5 minutes between each reset. Unless you let it sit overnight and then its the same thing all over again.
I'm lost guys and would really need some help. I only ask that you treat me like a dummy and walk me through it.
The time correlation you've mentioned points very strongly to a thermal issue... somewhere.
Is anything getting hot? Check the regulator in particular, the SOT-223 part near the barrel jack. If you have a thermal IR camera, those can be useful for locating the hotspot - but most of us don't have one of those
Yeah, Seek Thermal is the one I use - unfortunately I originally got it to be james bond, and got the longer range one, whereas it turns out that using it to look at overheating electronics (which wants the non-XR one) is much more useful in my life as not-james-bond. They're okay, but the XR one really doesn't work well for debugging electronics.
I have an IR thermometer for checking engines and i also have a SEEK thermal camera for the same reason. I'll check that tonight.
I did touch every single component (or at least i think i did) on the board, and nothing even felt warm.
As for power supplys, i've tried using the stock one that looks like a laptop cord. I've tried using the power supply that came with the heated bed kit i bought but have not installed yet and i've used the power supply off of my Prusa 3D printer that works well in that machine.
I don't have that tool but i did put very nice accurate voltage meter and it never fluctuated during the time that it reset. It did fluctuate a little during startup but leveled out as the temps reached operating temp. I don't think 3 separate power units would have the same problem though
TriGorilla board looks like nice hardware (just my first impression looking at the board) - and it uses a CP2102 serial adapter, instead of the mysteriously fragile 16u2's that the official megas have.
It sounds like your issue is a physical intermittent, if it's vibration sensitive. Could be a short (board vibrates, underside comes into contact with something metal, shorting the underside of the pins together) or a loose connection.