Creality K1 takes a long time to start printing, swings between 150 and 220C 2 times

Basic Information:

Printer Model: Creality K1
MCU / Printerboard: default
klippy.log
klippy.log (827.2 KB)

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Describe your issue:

My printer is relatively new to me. I installed Klipper on it. I am using a CHEP profile in Cura to create the gcode files.
When I start a print job, it takes about 6 minutes to get to the actual printing. It prints blastingly fast and quality is very good. But the 6 minutes bother me: it first heats up the bed to 50C, then heats up to hotend to 220C, then immediately cools down to 150C, probes the bed and then goes up to 200C then cools down again and heats up. How can I prevent this? It’s a waste of time.

Hello @krflyer !

Have you already done a PID tune?

https://www.klipper3d.org/Config_checks.html?h=pid#calibrate-pid-settings

I hope not, or you are a real professional and Klipper expert.

The K1 already comes with Klipper and unless you are really an expert, you should refrain from modifying anything on the Klipper side.
Doing so will likely render the whole thing unusable or severely limited, since this printer uses a heavily modified Klipper version.

Ok, obviously wrong terminology here: I enabled root access, and enabled Mainsail etc.

OK, good point. I will run that during lunch break and report back. Thanks so far!

OK, I did the PID calibration for the extruder and the bed. That’s not it. I get your point: you think I am referring to slight variations that may get out of tolerances.
It is rather all the operations it does before starting to print. It does a bed probing and wiping the hotend operation, but the temps that are used for these operations vary, and therefore, take a long time. I will include a screen snapshot so you can see that the target temps start at 220, then 150 etc. As you can see, it takes almost 7 minutes before it starts printing the first layer.

Have you checked the gcode-file?

If the temperature changes are in there, the culprit is the slicer.


BTW: The klippy.log looks different.

It appears you do not run a genuine Klipper version:

Git version: '09faed31-dirty'

You need to be aware that the Klipper version and printer.cfg is far from any standard.
Unintended behavior (given that you use Creality’s standard firmware) is best reported to Creality.

Except for very general things, we do not support these customized versions as it might turn out to be a lot of effort and investigations to finally notice the behavior is due to these manufacturer modifications.

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I totally agree with that!

Maybe they do the heating sequential to protect the power supply. Might be weak.

I tried to open an issue here GitHub - CrealityOfficial/K1_Series_Klipper: clone from https://github.com/Klipper3d/klipper/ impossible. Creality links you back to
Contact - Klipper documentation or
https://klipper.discourse.group/ I don’t think that’s ok. I think Creality is no sponsor.
or klipper

I would contact them techsupport@creality.com found here Creality · GitHub!

From what I saw in your klippy.log it’s in the [custom_macro] g28_ext_temp = 140.

Don’t you loose your warranty doing that? But anyway, Creality is probably aware of that since you are in their cloud :wink:

I would contact Creality and make NO CHANGES till the warranty is over!

Good luck, hcet14

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