Ender 3 with BTT RRF 1.1 - no bed heat
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@linkvanayli that just means that heater 0 is the bed, which is normal.
can you post a photo of your wiring?
also, with the sd card removed, does the bed still heat up? -
With no SD card the LCD is blank. I can't connect over serial either in this state.
With the SD card in, sending M140 S55 results in:
"[ERROR] Error: Heater 0 fault: at 30.4°C temperature is rising at 0.4°C/sec, well below the expected 2.2°C/sec" Then the heater faults and needs to be resetImages:
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@linkvanayli oh, does not heat.
Does it work when tuning the bed?
M303 H0 S60 -
@jay_s_uk
Yes I just tuned the bed and it heated slowly but fine.
M140 now works, though slowly
Still can't set the temperature from the LCD panel though -
@linkvanayli i believe setting the temp from the LCD is a known issue as the bed is not active
Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is
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@jay_s_uk
Thanks so much for the assistance! -
@jay_s_uk
So M140 straight up doesn't work and the heater keeps faulting for 0.3C/s temperature rise. It's just heating super slowly when commanded over serial. But when tuning PID it works fine.
Bang bang mode also heats it super slowly. -
@linkvanayli what was the M307 output from tuning?
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Heater 1 model: heating rate 2.429, cooling time constant 140.0, dead time 5.50, max PWM 1.00, calibration voltage 0.0, mode PID
Computed PID parameters: setpoint change: P13.4, I0.482, D51.4, load change: P13.4, I0.949, D51.4 -
@linkvanayli thats heater 1. i'm assuming you're using heater 0 for the bed?
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Wrong H value, sorry:
Heater 0 model: heating rate 2.429, cooling time constant 140.0, dead time 5.50, max PWM 1.00, calibration voltage 0.0, mode bang-bang
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@linkvanayli i'm surprised you've got the same values for heater 0 and heater 1.
Best to run the PID again and make note of the M307 line thats output, or use M500 and make sure you have M501 at the end -
@jay_s_uk
SO I ran the PID tuning for both heaters and got this:2021/12/13, 15:49:54 M307 H1
Heater 1 model: heating rate 2.429, cooling time constant 140.0, dead time 5.50, max PWM 1.00, calibration voltage 0.0, mode PID
Computed PID parameters: setpoint change: P13.4, I0.482, D51.4, load change: P13.4, I0.949, D51.42021/12/13, 15:49:46 M307 H0
Heater 0 model: heating rate 2.429, cooling time constant 140.0, dead time 5.50, max PWM 1.00, calibration voltage 0.0, mode bang-bang -
@linkvanayli that doesn't look correct. are you rebooting at all?
can you post the output that is displayed in DWC when tuning is complete? -
So I used a fresh SD card and reflashed the firmeware and all seems well. Thanks for all the help.
