Alfawise U10 conversation

[Pertti]

Hi friends!
I have an Alfawise U10 which has been waiting for duet wifi some time. The time has come now. Suddenly the original knob got stuck indicating that it was time to change the motherboard to duet wifi. The board fits the box ok, the endstops need to be wired so that they are "on" instead being "off".
The Alfawise power supply gives 12.4 volts and the heat bed resistance is 0.6 ohms.

Now the problem I faced was the heating of the bed and the nozzle:
Error: Heater 0 fault: temperature rising much more slowly than the expected 1.8°C/sec
T0
Error: Heater 1 fault: temperature rising much more slowly than the expected 1.7°C/sec
Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 3.2.2 (2021-02-11)
Duet WiFi Server Version: 1.26
I ran the pid tuning but it did not help. Any suggestions what to do next?

[alankilian]

@pertti

If you post the PID values for both heaters it will help others help you.

[Pertti]

@alankilian
ok, I try M303 T0 S205

"Failed to get file list
Directory 0:/macros/ not found"
Is that ok?

Warning: Auto tune of heater 1 failed due to bad curve fit (R=1.782, 1/C=0.0050:0.0049, D=9.8)

M303 H0 S60:

[alankilian]

@pertti

Well something is wrong.

Let's go back to the basics. Please post the following:

• config.g
• config-overrides.g
• M98 P"config.g"

THIS PAGE shows how to tune the heater models.

Also, THIS PAGE shows a step-by-step tuning process.
If you can post the console output while each step is running as shows in the example it will also help.

[Pertti]

@alankilian
I updated firmware 3.3

• hotend works fine now

• bed doesn´t. Error: Heater 0 fault: temperature rising much more slowly than the expected 1.4°C/sec
  config-overrides.g :not found

  M98 P"config.g"
  HTTP is enabled on port 80
  FTP is disabled
  TELNET is disabled
  config.g:

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.10 on Mon Mar 07 2022 20:17:53 GMT+0200 (Itä-Euroopan normaaliaika)

; General preferences
M575 P1 S1 B57600 ; enable support for PanelDue
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Alfawise U10" ; set printer name

; 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 S1 ; physical drive 3 goes forwards
M584 X0 Y1 Z2 E3 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E420.00 ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00 ; set accelerations (mm/s^2)
M906 X800 Y800 Z1600 E800 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X400 Y400 Z500 S0 ; set axis maxima

; Endstops
M574 X1 S1 P"xstop" ; configure switch-type (e.g. microswitch) endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ystop
M574 Z1 S1 P"zstop" ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin zstop

; Z-Probe
M558 P0 H5 F120 T6000 ; disable Z probe but set dive height, probe speed and travel speed
M557 X15:215 Y15:195 S20 ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; 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
M307 H0 B1 S1.00 ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; 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
M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S280 ; set temperature limit for heater 1 to 280C

; 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 are not defined

[alankilian]

@pertti

Since there's no file config-override.g and there's no M501 in your config.g it looks like you tuned your heaters but forgot to save the tuning parameters and forgot to add the code to load them back when rebooting.

Follow the step-by-step sequence on THIS page to tune, save and load the tuning parameters.

[Pertti]

@alankilian
I got results after hours of tuning:
M307 H0 B0 R0.086 C686.8 D1.84 S1.00 V12.5
Bed seems to heat up now.
I have an impression that RepRapFirmware for Duet 2 WiFi/Ethernet 3.3 (2021-06-15) solved the problem.
Many thanks!

[alankilian]

@pertti

Excellent.

I'm glad you got it working.

Post a picture of something you print sometime.
I'd love to see something.

[Pertti]

@alankilian
Now printing chain links. A terrain model for modular building modules lies in front of the printer.
BTW I have no idea what is a reasonable max speed and acceleration for this kind of configuration.
And is there something else I could implement here?
Z-Probe and 2 end stops for z axis could be nice. My custom toolchanger has end stop stall detection, why not here?