Bed heating too slowly

ashtonwatts

Hi all,

I'm setting up a duet 2 wifi on a CR10s5, which has a 500x500mm bed. when I pre-heat the bed i get the error "Error: Heating fault on heater 0, temperature rising much more slowly than the expected 1.8°C/sec"

I can see that the temperature is going up, just not as quickly as the firmware wants but i think that's because of the size of it. How can i change this tolerance?

Board: Duet WiFi 1.02 or later
Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 3.0 (2020-01-03b3)
Duet WiFi Server Version: 1.23

Thanks

pipersw

run a M303 H0 S70 to tune the pid for 70°C. It resolve the issue.

jens55

Have you done a heater tune on the bed ?
You will find that the standard CR10-S5 is WAY underpowered to the tune of being almost useless ... but you should be able to get the bed hot enough for PLA

jens55

I doubt the bed will be able to reach 70C ... I'd try for 60

droftarts

@ashtonwatts You need to tune the bed heater with M303 H0 S60, for example (assuming H0 is your bed heater, and 60ºC is your target temperature), then save the output to config-override.g with M500. Then either have M501 at the end of config.g (to load config-override.g) or copy the M307 command into config.g where the heaters are defined. Note that tuning will set the bed to PWM control rather than bang-bang, so if you want to keep it on bang-bang, change B0 to B1. eg on my heated bed (12V 200x200mm Prusa 2a red heated bed PCB), M303 tune created:
M307 H0 A215.5 C661.6 D5.8 S1.00 V11.6 B0
For bang-bang, change to:
M307 H0 A215.5 C661.6 D5.8 S1.00 V11.6 B1

I tend to run the heater tuning 3 times, to home in on the best settings. Make sure the bed is at room temperature between each tune. Also tune the hot end. See https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control

Ian

ander

@droftarts
Hi there, i have the same issue, i made the calibration for the bed 3 times using m303 and then send the M500 (and yes, i do have m501 in config.g).
I still have the error that says: Heater 0 fault: temperature rising too slowly: expected 0.73°C/sec measured 0.14°C/sec
If enyone could help me would be awesome
this is my config.g:

< ; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2.1.8 on Thu Feb 27 2020 08:16:33 GMT+0100 (hora estándar de Europa central)

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Muxar 3.1" ; set printer name
M584 X0 Y1 Z2 U4 E3 F5 ; set drive mapping
M665 R228.6 L407.8:407.8:407.8:340 B200 H445 ; Set delta radius, diagonal rod length, printable radius and homed height
M669 X0 Y0 ;esto especifica el ofset de la salida del extrusor referente al centro de la mesa
M666 X0 Y0 Z0 F0 ; put your endstop adjustments here, or let auto calibration find them
M575 P1 B57600 S1

; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

; Drives
M569 P0 S1 ; physical drive 0 goes forwards
M569 P1 S1 ; physical drive 1 goes forwards
M569 P2 S1 ; physical drive 2 goes forwards
M569 P3 S0
M569 P4 S0 ; physical drive 3 goes backwards

M350 X16 Y16 Z16 U16 E16 I1 ; Configure microstepping with interpolation
M92 X80 Y80 Z80 U400 E415 ; Set steps per mm

M566 X1200.00 Y1200.00 Z1200.00 U1200 E1200.00 ; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z12000.00 U12000.00 E12000.00 ; set maximum speeds (mm/min)
M201 X2000.00 Y2000.00 Z2000.00 U2000.00 E2000.00 ; set accelerations (mm/s^2)
M906 X1200 Y1200 Z1200 U1200 E1200 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 S1 Z-2 ; set minimum Z
M208 S0 U1000

; Endstops
M574 X2 S1 P"xstop" ; configure active-high endstop for high end on X via pin xstop
M574 Y2 S1 P"ystop" ; configure active-high endstop for high end on Y via pin ystop
M574 Z2 S1 P"zstop" ; configure Z-probe endstop for low end on Z
M574 U2 S1 P"e0stop"
M574 F2 S1 P"filamentstop"

; Z-Probe
M558 P8 C"E1stop" H5 F1200 T6000 ; set Z probe type to effector and the dive height + speeds
G31 P500 X0 Y0 Z-0.26 ; set Z probe trigger value, offset and trigger height/cuanto mas negativo mas separado de la mesa
M557 R175 S80 ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M307 H0 A215.5 C661.6 D5.8 S1.00 V24.0 B1 ;M307 H0 R0.905 K2.126:0.000 D1.06 E1.35 S1.00 B0 ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M308 S1 P"e0temp" Y"thermistor" T100000 B4725 ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1 ;create nozzle heater output on e0heat and map it to sensor 1
M143 H1 S250 ; set temperature limit for heater 1 to 280C
M307 H1 R3.841 K0.319:0.000 D7.07 E1.35 S0.50 B0 V23.9;disable bang-bang mode for heater and set PWM limitM307 H1 A346.2 C140 D5.3 B0 S0.8 V23.8
M570 H0 P15 T1
; Fans
M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 F0 ; define tool 0
G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets
G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C

; Custom settings
M591 D0 P1 C"exp.e2stop" S1 ; filament monitor connected to E2 endstop

; Miscellaneous
M501 ; load saved parameters from non-volatile memory>

droftarts

@ander Please send M115 in the console, and post the response, so we can see what firmware version you are using. Please also post your config-override.g.

Usually better to start your own thread and refer to this one in it, rather than necro-posting a 4-year-old thread!

Ian

ander

@droftarts
thanks, i started a new topic as suggested
https://forum.duet3d.com/topic/34439/bed-heating-problem