@droftarts HI,

Nop i dindt try use the Q500. Bed now heats up normally without any errors and, but when i tried to redo the pid the saw still showed up but its not bothering me anymore as the bed heats up and the temperature is stable.

@droftarts if i am correct then it should look now like this right?

M308 S0 P"bed_temp" Y"thermistor" T100000 B3950 A"Bed"
M950 H0 C"bed_heat" T0 Q10 ;set thermistor + ADC parameters for heater 0
M307 H0 R0.861 C527.730:527.730 D1.97 S1.00 V24.3 B0 I0
M140 H0 ; map heated bed to heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C

Sorry i am new to duet and just learning everything

@droftarts said in Heater 0 fault: temperature slowly than the expected 1.2°C/sec:

M307 H0

Hi,

So i ran a M307 H0 and i got these values

Then i used these lines:

M308 S0 P"bed_temp" Y"thermistor" T100000 B3950 A"Bed"
M950 H0 C"bed_heat" T0 Q10; set thermistor + ADC parameters for heater 0
M307 H0 D30
M140 H0 ; map heated bed to heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C

And started a PID tuning

M303 H0 S60.

After it finished: M307 H0 and the values are:

@droftarts thanks i will definitely try i will post for a result.

@siam Yes i have tried B4138, B3950 even B4092 i found somewhere every time the same thing. headbed line is like saw.

@o_lampe Its is taking yes about 40 min more or less. But the thing is its not consistent.

It must look normal waves, but i have 5 degree up and downs and after pid when its done it shows me inconsistent heating.

After that i cant get my bed to 70/80 or 90 degree it shows me the error.

Its not like this - -

Hi,

I have struggled with heat_bed pid tuning. i am using RRF3.3 verison.

M308 S0 P"bed_temp" Y"thermistor" T100000 B4138 A"Bed"
M950 H0 C"bed_heat" T0; set thermistor + ADC parameters for heater 0
M307 H0 B0 S1.00
M140 H0 ; map heated bed to heater 0
M143 H0 S110 ; set temperature limit for heater 0 to 120C

When i run pid tuning the line is in waves not consistent.

I have this heat bed https://www.ratrig.com/3d-printing-cnc/3d-printer-kits/heater-bed-pad-kit-keenovo-300-x-300mm-220v-750w-ssr-40a-relay.html

and a suggestion to use:

M308 P0 T100000 B4138 C0 R4700 ; set thermistor + ADC parameters for heater 0
M307 C581.4 D1.4 S1.00 V0 B0 F500
M143 H0 S90

This line (but i think it is incomplete) to use so i am missing something.

I have tried different lines and nothing worked. as my default error is:

Error: Heater 0 fault: temperature rising much more slowly than the expected 1.2°C/sec

or

Error: Heater 0 fault: temperature rising much more slowly than the expected 1.3°C/sec

maybe someone can help me with this problem.