RRF36 weak extruder (overheating?)

justGuner

The extruder connected to the toolboard runs at like half power or less after some time. I don't know if the 2209 is entering into overheating protection or if it is a code issue. From your experience, does the stepper driver on the rrf36 need aditional cooling, or is the incuded heatsink enough?

oliof

@justGuner in my experience the included heatsink is enough. The TMC driver would generate an overtemp warning if it would overheat.

Which RRF version do you run?

justGuner

@oliof 3.5.0-rc3

oliof

@justGuner try one of the post rc3 builds from https://forum.duet3d.com/post/335539 where some extruder-toolboard-issues were fixed.

gtrider

@oliof Those are for the Duet toolboard not the RRF-36. I did update the Duet 3 mini 5+. I am using the firmware in DC42's dropbox.
The RRF-36 on mine seems to be working fine.

; Heaters
M308 S0 P"temp0" Y"thermistor" T98801 B4185 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0                          ; create bed heater output on out0 and map it to sensor 0
M307 H0 B0 S1.00                            ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                     ; map heated bed to heater 0
M143 H0 S125                                ; set temperature limit for heater 0 to 125C
M308 S1 P"124.temp0" Y"thermistor" T100000 B4680 C6.455513e-8  ; configure sensor 1 as thermistor on pin temp0
M950 H1 C"124.out0" T1                          ; create nozzle heater output on out0 and map it to sensor 1
M307 H1 B0 S1.00                            ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S275                                ; set temperature limit for heater 1 to 275C
M308 S2 P"124.temp1" Y"thermistor" A"RRF36 Temperature" T100000 B4092 ; board thermistor

Edit justGuner, did you also update the RRF-36 to rc3? I know on mine when I updated to duet 3.5.0 rc 2 with the RRF-36 on an older beta it was not very happy.

https://github.com/gloomyandy/RepRapFirmware/releases

justGuner

@gtrider Yes, mine originally came with rc 1, but now it's running on rc 3

gtrider

@justGuner Left mine run oversight on a print to see if it had any problems and it is doing fine. The workshop is 72°F (22.2°C) Printer is enclosed and inside is warmer. Printing an ASA print the bed is set to 110°C. Print is doing well and no extrusion related artifacts are showing. 7+ hours into the print with 11+ to go.

Paused the print and felt the heatink on the RRF-36 and it feels warm but not what I would be worried about. I was able to hold my finger on it. This one does not have a cover on the toolboard. Have never noticed any issues with another that does have a cover on it.

Is your toolboard covered and or the printer enclosed? Wondering if maybe airflow to the heatsink is reduced on yours. @gloomyandy or @jay_s_uk are the ones who would know how the RRF-36 would act if it were being overheated.

I am running a copy of the Duet 3 mini 5+ rc3 firmware that is 2 weeks old that came from DC42's dropbox. And the RRF-36 rc3 firmware from gloomyandys github.

I can't check what is on DWC because I seem to have lost WiFi connection. So no idea what the RRF-36 or Duet mini 5+ are showing for temperature.

gloomyandy

@justGuner What does M122 b124 (or whatever board number your RRF36 is) report when it is in this "low power" state? What current setting do you have for the driver? Is this in a heated chamber? How are you determining that the power has been reduced?