Belt tension

Flagship K Series Creality Flagship K1 & K1C
1

Hi everyone,

I’m struggling with dimensional accuracy on my Creality K1C. I’ve been printing calibration cubes and while my Y-axis is dialed in perfectly (exactly 20.00mm) and Z is corrected, my X-axis is consistently coming out short (around 19.65mm).

I’ve already tuned flow, PA, cooling, and shrinkage in Orca Slicer, but the discrepancy between X and Y suggests a mechanical issue. I suspect my belt tension is incorrect or uneven.

I tried reaching out to Creality Support for official specs, but I haven’t received a reply. I also can’t find any clear documentation specifically for the K1C regarding belt tuning using the frequency (sound) method.

Could anyone confirm:

  1. What is the official target frequency (Hz) for K1C belts? (I’ve seen conflicting info between 110Hz and 140Hz for the original K1).

  2. Where exactly should the toolhead be positioned during the measurement to get a reliable reading? (Pushed fully to the front, back, or centered?)

I want to make sure the mechanics are squared away before I resort to scaling models in the slicer.

Thanks in advance for your help!