One issue most users encounter when using the Creality K1 is.

"Why is the Z-axis quality not as good as I thought?"

Lately, it seems like the initial quality issues have been slightly improved... There are many posts overseas sharing results of good quality, but the printing issues I experienced a few times, like the Z-axis extrusion defect, still seem unresolved.

After experiencing this issue myself initially, I thought I hadn't been able to activate the feature labeled "G-sensor" on the K1 product description page.

Source: https://www.creality.com/kr/products/creality-k1-3d-printer

I clearly expected a result like the one on the left when the G-sensor is ON.. but most of the time you will see the result on the right.

In order to resolve this issue, I conducted various searches and tests, and discovered a few facts. First, unlike most 3D printers that show better quality at low speeds, the K1 actually shows relatively decent quality at speeds above 150 mm/s.

So, based on this experience, I have created and am sharing my own custom settings.

Information for High-Quality Creality K1 Printer Output
Creality 3D, Creality's default slicer, is often lacking in quality. Therefore, to improve this, I have created and shared settings that modify the default slicer's values to achieve good surface quality and reduce print time.
soonsoonSOONSOON STUDIO

Now, users overseas are also sharing similar experiences, stating that they get good results at around 150 mm/s ~ 200 mm/s or higher, which aligns with my opinion.

Omran Al Sayed's shorts trying everything with the K1.

Another point is that the G-sensor mentioned in the K1 introduction page earlier was discussed as one of the functions in the Klipper firmware during the calibration process, known as PA (Pressure Ahead, pressure compensation).

In other words, the G-sensor that Creality proudly talks about is a story about PA adjustment.. but this is a story that this PA is not working properly.

As mentioned in the post below, they shared that it is now possible to set up extrusion calibration through the recently updated slicer functionality.

Trying Out the Creality 3D Print Slicer Calibration
The Creality Print program, a dedicated slicer for Creality's high-speed 3D printers, has added a calibration feature. I looked into it and tried using it in practice.
soonsoonSOONSOON STUDIO

However, since then, as I've been printing, I've noticed that volume speed adjustment affects actual print time and shows significant differences in the print results.. I wasn't sure if the PA adjustment was done correctly.

Then a few days ago, an interesting post appeared on the Facebook K1 & K1 Max user group where users were posting a lot, discussing that PA likely isn't working properly in the current K1 firmware. (!!!)

Written by: Cyril Guislain Source: https://www.facebook.com/groups/557442779831567

It's actually quite surprising news..

It appears that Creality has been releasing the K1 without properly implementing this feature. While this is shocking news, conversely, it suggests that if this specific issue is resolved, the K1's quality could improve significantly, even though it would still be somewhat lacking.

Indeed, several users have raised the issue of Z-axis quality on the official K1 series again, and the official response suggests they are working on a firmware issue, so it seems highly likely that the user's inference is correct.

Text may be in the image
Content shared by user James Stanley, source: https://www.facebook.com/groups/557442779831567

Looking at this answer, it's interesting.. It says to print the printer faster.. This is Creality's official answer that quality issues arise at slow speeds..

If my memory serves me right, I believe I was the first among global users to share a tip that the quality comes out well at speeds above 150mm/s.. I wonder if Creality recognized this issue through users like me?

Cyril Guislain, who raised the firmware issue above, shared the firmware values as editable data via Github, but I'm not sure if I can use this.. Since it's an unfamiliar task, I haven't tried it yet, but if there is a brave soul (?) who wants to try it, let's give it a try.

GitHub - Guilouz/Creality-K1-and-K1-Max: Custom Firmwares for Creality K1 & K1 Max
Custom Firmwares for Creality K1 & K1 Max. Contribute to Guilouz/Creality-K1-and-K1-Max development by creating an account on GitHub.
GuilouzGitHub

I haven't been able to verify if the issue raised by the user above is 100% accurate yet..

If the vibration frequency-based extrusion correction algorithm that Creality proudly introduced as a 'G-sensor' was unfinished, or if they tried to introduce the feature provided by Klipper as if they had developed it themselves... and failed, leaving them unable to respond, then the recent news about the open source release seems quite timely and appropriate.

Whatever the case, I welcome it as an opportunity for the K1 series to improve in quality.. But somehow.. positioning it as a printer built by users themselves seems to be Creality's homework to solve in the future, and at the same time, I think they need to come up with a different strategy than Bambu Lab.

When I first received the K1 and saw overseas users pouring out their opinions while using fluid or slicer based on Klipper firmware, I was amazed..

Ultimately, I think their judgment was correct.