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Homebrew engraver to 3D printer Mod
BillTodd:
Well ths is getting very frustrating!!!
Auto tuned the pid of the bed and extruder without any problems , added the values into the config , and up popped an update , libraies updated some error with U8glib , now it will not compile .
Apparently u8glib has bee superceded by u8g2 but i have no idea how to add this to marlin - any arduino experts handy???
Managed to add the pid values to the installed version using m304 p i d and run bed and extruder preheat perfectly
more frustrating is that the thing is still randomly stopping while printing - it just seems to swith the power off for no obvious reason - it is not loose connection as first thought but i have no idea atm whhatnis causing it : :scratch:
AdeV:
Just thinking out loud - does it always stop after around the same length of time running? Like an auto-power-off function, or some electronickery overheating?
BillTodd:
No the stopping / power off appears random i.e it could be 3hours , 2 hours or as just now within a minute of starting to print . I don't think it's the psu as it powers back immediately as the board is reset and it comfortably drives motors, heater and extruder without dropping below 11.8v (measured on the board.)
I'll try running it woth bed heater as a test ...
chipenter:
The stepper drivers have thermal cut outs I fitted a computer fan , that stopped the dropped steps the board my have temperature cut outs .
BillTodd:
Thanks Jeff , but all axes stop and the 12v rail disappears
I ran it last night without the hot bed and got a near perfect print (nozzle still leaking a bit). I switched to the blue painters tape as recommended by Don and it really seems to hold the print flat even without heat.
I think it must be spikes on the earth/ negative side of things . The board I have does not seem to have a separate 5v ground wire so will be reliant on the two 12v grounds which could be drawing 20+ amps peak , that's enough to cause some serious spiking/dipping of the 5v rail .
Bill
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