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OpenKE — perfect prints on the Ender-3 V3 KE

So you've got a Creality Ender-3 V3 KE and you want it to print really well — clean first layers, square parts, quiet motors, no babysitting. That's the whole point of OpenKE.

OpenKE is three things in one project:

1. A better screen. A fast touch UI that replaces the stock interface — full print control, an interactive 3D bed mesh you can spin around, and an on-screen calibration suite. It runs right on the printer's display (no PC, no display server). The UI is a KE-focused fork of GuppyScreen.
2. The mods that actually make prints good. Adaptive bed mesh + purge (KAMP), Axis Twist Compensation, TMC Autotune, skew correction — the stuff people normally hunt down across a dozen GitHub repos, gathered and documented here for the KE.
3. Guides that explain the why. Not just "tap this button" — when to recalibrate, what each tool fixes, and how to chase down a specific print problem.

Heads-up on the name: this project used to be called GuppyKE and is now OpenKE. Recent releases are tagged vX.Y-OpenKE (older ones were vX.Y-GuppyKE), and you'll still see GuppyKE in a few file names — same project. Already running an older version? See Upgrading from an older version.

New here? Do this

1. Install OpenKE — one command over SSH, keeps your config (and backs it up).
2. Take the screen tour — see what every panel does.
3. Read "Perfect prints — start here" — the short path from "it prints" to "it prints well."

Want better prints specifically?

Start with Perfect prints — start here, then dig into whichever of these matches your problem:

• First layer squished on one side, lifting on the other? → Perfect first layer (Axis Twist + KAMP)
• Parts come out as parallelograms / not square? → Skew Correction
• Motors loud or hot? → TMC Autotune
• Want the full calibration walkthrough (A→Z)? → Calibrate step by step
• Layer shift right after a pause/resume? → Fix layer shift after pause

What's actually in it

• Print status & control, with chamber/MCU temps on the print screen
• Interactive 3D bed mesh — colour height map you can rotate/zoom/pan (plus a table view)
• On-screen calibration suite — Axis Twist wizard, Skew Correction, TMC Autotune, live Z-offset baby-stepping (down to 0.001 mm), input-shaper & belt graphs
• Fine-tune mid-print — speed, flow, Z-offset, pressure advance, firmware retraction
• File browser (incl. USB sticks), macro/console shell, Spoolman, TMC metrics
• WiFi Low-Latency toggle — snappier Mainsail/screen (power-save off, roam off, Bluetooth off)
• Buzzer beeps & songs — real-pitch M300, PLAY_TUNE jingles, and a soft touchscreen click (Beeps & songs)
• Print-state safety locks — anything that could wreck a running job is blocked or asks first
• Power-loss recovery, and a 480×272 layout tuned for the KE (screen the right way up)

Will it run on my printer?

OpenKE is built and verified for the Creality Ender-3 V3 KE specifically.

Printer	Creality Ender-3 V3 KE
Chip / arch	Ingenic XBurst2 X2000 — MIPS (mipsel), not aarch64
Display	480×272

The code can build for other boards/screens (and an x86 simulator for development), but the installer and the on-device fixes here are written for the KE. If you have a different printer, this isn't the droid you're looking for.

Building it / contributing

Developer docs live in the 🛠️ Developers section of the sidebar — start with Build from source and Architecture.

License & credits

GPL-3.0. The touch UI builds on ballaswag/guppyscreen and probielodan/guppyscreen, with the 3D bed mesh from prestonbrown/guppyscreen. The vendored Klipper mods keep their own upstream licenses and credits — see Contributing. Full credits there too.