Duet3 280C heater cap for hotness

[kroybal]

Hello community,

I am nearly complete with implementing my duet 3 to my shop's AON-M1 printer. This machine has the potential to kick up the hotends to somewhere above 500C. Ideally I want to cap it off at 500 and be able to set the active temperature to 400C if need be. My shop has some filaments we would like to be able to print with i.e. Ultem PEI (Ultem 9085) which has extruder temperature rating of 340-370C.

The issue I encounter is, if I set the active temperature of the extruder in the config above 280C the DWC will display -273.15C aka absolute 0. Here is my config settings for the heater.

Heater Definition of left & right extruder are identical:

; Left nozzle>>>
M308 S1 P"spi.cs0" Y"rtdmax31865" A"PT100 (L)"  ; configure sensor 1 as thermocouple via CS pin spi.cs0
M950 H1 C"out0" T1                              ; create nozzle heater output on 1.out0 and map it to sensor 1
M307 H1 A180.0 C140.0 D5.5 B0                   ; disable bang-bang mode for heater  and set PWM limit
H143 H1 S500									; set temperature limit for heater 1 to 500C

Tool definition:

M563 P0 S"LEFT" D0 H1 							; define tool 0
G10 P0 X0 Y0 Z0                                 ; set tool 0 axis offsets
G10 P0 R20 S275                                 ; set initial tool 0 active and standby temperatures to 0C
M563 P1 S"RIGHT" D1 H2			                ; define tool 1
G10 P1 X587 Y0 Z0                               ; set tool 1 axis offsets
G10 P1 R20 S275                                 ; set initial tool 1 active and standby temperatures to 0C

If I take my G10 P0 R20 S275 and set the S parameter >280 it'll basically nill/NAN (however the DWC chooses to treat this) back to absolute zero.

How can I get these extruders to kick out some serious heat ?

[Veti]

what is your firmware version?
use M115 to check

[kroybal]

@Veti

Board: Duet 3 MB6HC (MB6HC)
Firmware: RepRapFirmware for Duet 3 MB6HC 3.1.1 (2020-05-19b2)

[Veti]

can you issue
M409 K"heat" F"f"

and see if the temperature is reported correctly there?

[kroybal]

@Veti
M409 K"heat" F"f"
{"key":"heat","flags":"f","result":{"heaters":[{"active":110.0,"current":110.0,"standby":0,"state":"active"},{"active":238.0,"current":107.3,"standby":238.0,"state":"off"},{"active":275.0,"current":37.0,"standby":20.0,"state":"off"},{"active":28.0,"current":31.7,"standby":0,"state":"off"}]}}

... I believe I did update my firmware recently and I am not totally sure about my timeline in which I have tried certain things. It is possible that I tried to implement higher temperatures during the older firmware version dating back to February/March 2020.

However, trying again still reports -273.1C to the DWC active temperature.

[Veti]

what temperature did you set the hotend to at the time of the command?

"current":37.0

was this while heated above 280?

[kroybal]

@Veti I repeated the command

M409 K"heat" F"f"
{"key":"heat","flags":"f","result":{"heaters":[{"active":105.0,"current":95.9,"standby":80.0,"state":"standby"},{"active":238.0,"current":209.0,"standby":170.0,"state":"standby"},{"active":275.0,"current":41.2,"standby":20.0,"state":"off"},{"active":28.0,"current":35.9,"standby":0,"state":"active"}]}}

this time also reporting the status of the heaters

was this while heated above 280

I have not been able to attempt temperature values above 280.

[achrn]

@kroybal said in Duet3 280C heater cap for hotness:

Heater Definition of left & right extruder are identical:

; Left nozzle>>>
M308 S1 P"spi.cs0" Y"rtdmax31865" A"PT100 (L)"  ; configure sensor 1 as thermocouple via CS pin spi.cs0
M950 H1 C"out0" T1                              ; create nozzle heater output on 1.out0 and map it to sensor 1
M307 H1 A180.0 C140.0 D5.5 B0                   ; disable bang-bang mode for heater  and set PWM limit
H143 H1 S500									; set temperature limit for heater 1 to 500C

Change the H143 to an M143?

[kroybal]

@achrn Yikes a typo

Edit: Typo was my issue I can get the 370 I need thanks guys.

[Phaedrux]

@kroybal said in Duet3 280C heater cap for hotness:

                                                                                                                            M563 P0 S"LEFT" D0 H1 							; define tool 0                                                                                                                                                                            G10 P0 X0 Y0 Z0                                 ; set tool 0 axis offsets                                                                                                                                                                            G10 P0 R20 S275                                 ; set initial tool 0 active and standby temperatures to 0C                                                                                                                                                                            M563 P1 S"RIGHT" D1 H2			                ; define tool 1                                                                                                                                                                            G10 P1 X587 Y0 Z0                               ; set tool 1 axis offsets                                                                                                                                                                            G10 P1 R20 S275                                 ; set initial tool 1 active and standby temperatures to 0C                                            

I don't think it's wise to set temperatures in your config.g