hello,
i'm totally new here so sorry if this doesn't belong here.
today my power supply arrived 12v 600w 0-50A, only for my heatbed it's an aluminum plate from ratrig 3003004mm
i use an kapton heatpad with the same dimensions on 12v i have placed a thermistor (T100000 B4138) on it and covered the whole thing with insulation to prevent heat loss from the bottom.
now i started the pid tune of my bed and after 3 hours it gave me this error:
21-1-2021 21:56:58 Warning: heater behaviour was not consistent during tuning
Warning: Auto tune of heater 0 failed due to bad curve fit (R=0.036, 1/C=-0.0069:-0.0069, D=0.5)
21-1-2021 19:42:21 Auto tune starting phase 3, fan off
21-1-2021 19:22:44 Auto tune starting phase 2, heater settling
21-1-2021 19:22:44 Auto tune starting phase 1, heater on
21-1-2021 19:22:39 M303 H0 S50
Auto tuning heater 0 using target temperature 50.0°C and PWM 1.00 - do not leave printer unattended
what can be the issue? the power supply has more then enough watts could it be that i use an mosfet?