i build a SmartRap with an Arduino Mega and a Ramps 1.4 board
it suddenly stopped heating the hot end up to 200 degrees, only at 140 or lower
i reloaded the Marlin firmware
i mounted a new hotend
i replaced the arduino
i replaced the ramps 1.4 board
no effect
when i use a separate power supply for the hot end it still does not reach the needed 190 degrees
i measured the resistance of the thermistor in the hot end , it is 103.4 Kohm.
the blinking of the led might indicate that the machine thinks the hot end is hot enough, but it isn't
when i change the PID values the blinking stops but i don't get 200 degrees
the strange thing is that the problem suddenly started to occur without changing anything.
the same Repetier software that drives my delta printer also drives the SmartRap on the same computer.
does anyone know what is wrong
i am out of options here
thanks in advance,
Doede.