Anycubic Kobra S1 Complete Setup Guide: Native Klipper, Auto-Leveling, and Your First Print

Anycubic's Kobra 3, covered elsewhere on this site, runs Anycubic's own closed firmware stack. The Kobra S1 is a different animal: it's Anycubic's first mainstream printer to ship with Klipper as the native controller firmware rather than a proprietary fork, which changes both what you can tune on the machine and which community tools actually work with it. This guide covers unboxing, first calibration, and your first print, with particular attention to what's genuinely different about buying a Klipper machine off the shelf versus converting one yourself.

Why "Ships With Klipper" Matters More Than It Sounds

This site's Klipper installation guide covers converting an existing printer — flashing firmware, setting up Moonraker and a web interface, writing a printer.cfg by hand or adapting one. The Kobra S1 skips all of that: Klipper is already running on the mainboard, already paired with a web interface, and already tuned with manufacturer-supplied input shaper and pressure advance values for the stock hotend and extruder. The practical tradeoff is the same one you hit with any vendor Klipper implementation (Creality's K2 Plus and Qidi's recent boards included): you get a working machine faster, but you're relying on Anycubic's build of Klipper and their web UI rather than a vanilla Mainsail/Fluidd setup, and not every community macro or plugin designed for a "real" Klipper install will drop in cleanly.

Unboxing and Assembly

Like most current-generation Klipper-native machines, the S1 ships mostly assembled — this is not a kit build in the Voron sense. The setup steps that actually matter:

• Remove all gantry and bed shipping restraints, including the foam block under the bed and any zip ties on the Z-axis — running the first homing cycle with these in place is the most common first-boot failure across every enclosed Klipper-native printer this site has covered.
• Connect the filament runout sensor and any accessory cables (chamber light, camera if your configuration includes one) before the first power-on; several are easy to miss since they route behind the side panels.
• Level the bed using the touchscreen's auto-leveling routine — the S1's leveling probe (strain-gauge based, like the auto-leveling sensors this site covers generally) builds a full mesh automatically, so manual corner-knob leveling isn't part of the normal workflow at all.
• Update firmware to the current release before your first print; Anycubic has pushed meaningful Klipper tuning updates (particularly to input shaper defaults) since initial units shipped.

Running Input Shaper and Pressure Advance Calibration

Because Klipper is native here, the calibration tools this site's Klipper content describes for converted printers are available out of the box rather than something you have to set up yourself. Run the built-in resonance test from the touchscreen or web UI before your first serious print — it measures the frame's actual resonant frequencies with the accelerometer built into the toolhead and feeds the result into input shaper automatically. This is the single biggest quality lever on a CoreXY-adjacent Klipper machine and takes under ten minutes; skipping it leaves real print-speed and ringing-artifact performance on the table that the hardware is capable of.

SpecAnycubic Kobra S1 Build volume250 × 250 × 250mm ControllerKlipper (native, Anycubic build) Max hotend / bed temp300°C / 110°C Max print speed600mm/s ConnectivityUSB, WiFi, LAN LevelingAutomatic strain-gauge mesh leveling

Your First Print

Use the manufacturer's PLA profile in Orca Slicer or Anycubic Slicer for your first print rather than importing a profile tuned for a different machine — the S1's stock pressure advance and flow values are specific to its hotend and extruder, and a profile copied from a Kobra 3 or another Klipper machine will under- or over-extrude until you re-tune it. A standard calibration cube or the classic 3DBenchy is the right first print: both will immediately show ringing, over-extrusion, or layer adhesion problems if your input shaper run or first-layer calibration needs another pass.

What's Actually Different From Converting Your Own Klipper Printer

If you've read this site's general Klipper conversion guide, you already know the headaches a native implementation avoids: no manual stepper current tuning, no hand-written kinematics config, no risk of bricking a mainboard during a flash. What you give up is full transparency into the config — Anycubic's web UI abstracts some settings a Mainsail/Fluidd install would expose directly as editable printer.cfg values. For most users this is a fair trade; for anyone planning to heavily customize toolhead electronics or run non-stock firmware builds, a DIY Klipper conversion on a more open platform remains the better starting point.

The S1 is worth attention specifically because it signals where the budget-to-midrange FDM market is heading — Klipper-native control used to be a Voron/Trident-kit feature, and now it's showing up in a sub-$500 enclosed machine with auto-leveling and a touchscreen. For anyone choosing between this and the Kobra 3 covered elsewhere on this site, the real decision is whether native Klipper tuning access is worth more to you than Anycubic's more mature proprietary ecosystem.