Extruder and Hotbed not heating up - BIGTREETECH SKR Mini E3 V3.0 + Ender 5

General Discussion
1

Basic Information:

Printer Model: Ender 5
MCU / Printerboard: BIGTREETECH SKR Mini E3 V3.0
Host / SBC: Raspberry Pi Zero 2
klippy.log (120.5 KB)
printer.cfg (2.6 KB)

Describe your issue:

Hello. I just upgraded the ancient Creality 1.1.4 board of my Ender 5 printer to a BIGTREETECH SKR Mini E3 V3.0 board. I flashed the new board with the klipper firmware compiled according to the instructions found at the top of the config file and I am able to connect to my printer using Octoprint/Octoklipper on a Raspberry without issue. Temperature sensors work fine as well and show the correct temperature. However, when I send a command to heat up the extruder or the hotbed, neither heats up by a single degree and after a minute or so I get the “Heater extruder not heating at expected rate” error message in Octoprint.

What I find really weird is that both the extruder and the bed are not heating up. I also thought that maybe I damaged a cable while connecting the new board but when I reconnect the old 1.1.4 board everything works fine and heats up as it should again.

The attached printer config is the same as the generic skr mini e3 v3.0 config with just the mcu change. From what I can see the Pin should be correct and triple checked it with the schematics of the board.

Does anyone have an idea what I might be doing wrong here? I would greatly appreciate any help.

2

grafik
grafik2316×721 145 KB

As you can see from the log:

  • Your bed never had any target set and as such Klipper did not even attempt to do anything
  • Your extruder had a target of 50°C and tried to reach it by turning power on fully (pwm=1) but nothing happened

According to BIGTREETECH-SKR-mini-E3/hardware/BTT SKR MINI E3 V3.0/Hardware/BTT E3 SKR MINI V3.0_PIN.pdf at master · bigtreetech/BIGTREETECH-SKR-mini-E3 · GitHub, it seems your heater_pins for bed and extruder are correct.

It is not clear why it is not working. What you can do:

  • Verify that you are properly supplying your board from the main power supply
  • Measure the output of the main power supply
  • Make sure the board is not jumpered to use USB power
3

Thank you for checking out my issue.
You are right the log I attached was one where I only attempted to set the extruder temperature. Here is one where I tried to set both the bed and extruder temperature targets:
klippy.log (140.6 KB)

Regarding the things you suggested: I am pretty sure the power supply is connected correctly. I also disconnected it to reconnect the old board which worked perfectly and then reconnected the BIGTREETECH board without success. But I already ordered a multimeter on Amazon to test the power supply output to make sure that its correct.

Regarding your third point, how can I make sure that that is not the case?

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