Hark Tech
Help & troubleshooting
Honest, practical fixes for the problems we see most often in the workshop. No paywall, no sign-up — just what actually works.
Creality
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Creality K2 Troubleshooting — First-layer, Extruder and Retraction Fixes
The Creality K2 is a capable printer with a handful of well-known quirks. This hub collects every K2-specific guide we've written, plus the general 3D-printing fundamentals that solve most first-time-user problems.
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Creality K1C bed mesh: how to run it and when it actually helps
How to run a bed mesh on the Creality K1C from the touchscreen and from Fluidd, what the heightmap is telling you, and when meshing will not save a bad first layer.
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Best slicer for the Creality K2 Plus: Creality Print vs OrcaSlicer
Creality Print ships with the K2 Plus and handles the CFS multi-colour system cleanly, but OrcaSlicer offers better print quality, calibration wizards, and tuning. Most enthusiasts end up using both — OrcaSlicer for single-colour, Creality Print for CFS jobs.
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Creality K2 Combo explained: what's in the box and what it does
The K2 Combo is Creality's enclosed CoreXY 3D printer sold with their CFS multi-material unit, giving you four-colour printing in a 350mm cube build volume without buying the bits separately.
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What input shaping does on the Creality K1 and K2
Input shaping is the feature that lets your Creality K1 or K2 print at high speed without ringing artefacts. The built-in accelerometer measures gantry resonance and the firmware filters the motion plan to cancel it.
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Input shaping explained for Creality K2 and Ender series
Input shaping cancels mechanical vibrations by timing stepper pulses to match your printer’s natural frequency, and Creality builds a dedicated tuning routine into their firmware.
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Cura settings for the Ender 3 Pro and S1 Pro
A practical guide to Cura slicer settings for the Ender 3 Pro and S1 Pro, covering the key differences between Bowden and direct-drive retraction, temperatures for common filaments, speed, cooling, and first-layer calibration.
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Creality K2 Plus PTFE tube: diagnosing and fixing common faults
A worn, pulled-back, or badly-cut PTFE tube inside the K2 Plus hotend is one of the most common causes of filament jams and inconsistent extrusion — this guide walks through identifying the fault and replacing the tube safely.
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Creality K2 Plus CFS: faults, fixes, and the small spool problem
The Creality K2 Plus CFS fails in predictable ways — from filament-tip detection errors to small-spool tangling — and most faults can be resolved without dismantling the hub assembly.
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Cura slicer settings for the Creality Ender 3, V2, and V3 SE
Recommended Cura 5 settings for the Creality Ender 3, V2, and V3 SE, with a particular focus on the retraction difference between Bowden and direct-drive variants, plus temperatures, speeds, and common fault fixes.
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Creality K2 Textured PEI Bed: Cleaning, Restoring Adhesion, and When to Replace
Most K2 first-layer failures are a dirty or worn PEI plate, not a slicer problem. This guide walks through the cleaning hierarchy, common mistakes that make adhesion worse, the genuine signs of a worn-out plate, and what to fit when it is time to replace.
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Why my K2 pressure advance was resetting to zero mid-print
Set PA in console, hold value, start print — and 13 seconds in it silently resets to zero. The cause is Creality's Qmode_exit macro firing from a delayed_gcode and reading an uninitialised variable. Three layers of fix, from one-line guard to proper slicer-side per-filament PA.
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OrcaSlicer files show "Slicer: Unknown" on the Creality K2 — a one-line fix
If your OrcaSlicer-sliced files show 'Slicer: Unknown' in Fluidd with no thumbnail and a print time guessed from the filename, the cause is Moonraker's metadata parser missing OrcaSlicer from its identifier dict. A one-line patch fixes everything Fluidd can already display.
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SCREWS_TILT_CALCULATE on the Creality K2 — manual bed levelling, no extra hardware
Klipper's manual bed-level helper, ported to work with Creality's older probe-helper API on the K2 family. Uses the existing strain-gauge probe.
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How we got adaptive bed mesh working on the Creality K2 — the reverse-engineering story behind KAMP-K2
The behind-the-scenes story: prtouch_v3_wrapper.so, the master-server daemon, and how KAMP-K2 sidesteps both without patching any binary or core Klipper file.
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KAMP-K2 — adaptive bed mesh and line purging that work on the Creality K2
A fork of upstream KAMP with the K2-specific glue Creality's firmware needs to make adaptive meshing actually work. Free, GPL v3, one-line install.
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What actually needs backing up on a Creality K2 (and why I built a tool for it)
The K2 hides important config files in non-standard places, and most owners back up the wrong things. Here's what actually matters, what's safe to skip, and a free tool that gets it right in one click.
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Why your Creality K2's input shaper recommendation might be wrong
If you've run SHAPER_CALIBRATE on a K2 and felt the result was off, you're not imagining it. Creality's fork of Klipper's shaper analysis has drifted from upstream — five concrete bugs, including a missing ZV anti-bias check that biases close calls toward the wrong shaper.
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Creality K2 extruder clicking or filament jam — quick fix
A clicking noise from the extruder on a Creality K2 or K2 Plus almost always means the drive gear is slipping on the filament. Here's how to find out why and fix it without tearing the whole toolhead apart.
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Creality K2 retraction settings — stop PLA and PETG stringing
The K2's direct-drive extruder needs shorter retractions than older Bowden Creality printers — if you've copied settings across from an Ender, you'll get jams or grinding. Here are the numbers we use, and what to change when strings still appear.
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Creality K2 bed leveling & first layer problems — a practical fix list
Almost every first-layer problem on the K2 traces back to one of four things: a contaminated bed, a wrong Z-offset, a failed auto-level run, or a residual blob on the nozzle before homing. This guide walks through each in the order we check them in the workshop.