Marlin served you well, but you’ve hit its limits — the 8-bit brain on your printer’s control board can’t process pressure advance fast enough, the LCD menu takes 45 seconds to navigate a bed mesh, and every firmware tweak requires recompiling. Klipper offloads all computation to a Raspberry Pi, turning your printer’s control board into a dumb motor driver. You get pressure advance, input shaping, a web interface, and firmware changes that apply with a config file edit and a restart. Here’s the full migration.
Klipper Installation Walkthrough
Step 1: Prepare the Raspberry Pi
Klipper runs on the Raspberry Pi (3B, 3B+, 4, Zero 2W, or an Orange Pi alternative). Install Raspberry Pi OS Lite (64-bit, Bookworm recommended) using Raspberry Pi Imager. Before writing the SD card:
– Enable SSH
– Set hostname (e.g., ender3-klipper.local)
– Configure WiFi credentials
– Set username/password (default pi/raspberry is fine for a printer)
Boot the Pi, SSH in, and update:
sudo apt update && sudo apt upgrade -y
Step 2: Install Klipper, Moonraker, and Mainsail via KIAUH
KIAUH (Klipper Installation And Update Helper) automates the entire stack. From the Pi:
sudo apt install git -y
cd ~
git clone https://github.com/dw-0/kiauh.git
cd kiauh && ./kiauh.sh
In KIAUH’s menu interface:
1. Install → Klipper (select Python 3.x)
2. Install → Moonraker (API server that connects Klipper to the web UI)
3. Install → Mainsail (web interface — cleaner and faster than Fluidd for most users)
4. Install → Crowsnest (optional, for webcam support)
KIAUH handles all dependencies, creates systemd services, and sets up the directory structure at ~/klipper/, ~/moonraker/, and ~/mainsail/.
Step 3: Build Klipper Firmware for Your Control Board
From KIAUH’s menu: Advanced → Build Firmware. This launches make menuconfig for the Klipper micro-controller firmware. The critical settings vary by board:
– Creality 4.2.2/4.2.7 (Ender 3, CR-10): Micro-controller Architecture = STMicroelectronics STM32, Processor model = STM32F103, Bootloader offset = 28KiB, Communication interface = Serial (on USART1 PA10/PA9)
– BTT SKR Mini E3 V3: Micro-controller Architecture = STMicroelectronics STM32, Processor model = STM32G0B1, Bootloader offset = 8KiB, Communication interface = USB
– BTT SKR 1.4/1.4 Turbo: Micro-controller Architecture = LPC176x, Processor model = lpc1769, Bootloader offset = 16KiB, Communication interface = USB
After configuring, press Q to exit, then Y to save. Run make to compile. The output file is ~/klipper/out/klipper.bin — rename it to firmware.bin and copy to an SD card.
Step 4: Flash the Control Board
Power off the printer. Insert the SD card with firmware.bin into the printer’s SD card slot. Power on. The board flashes automatically — the screen may stay blank or show nothing, which is normal. Wait 60 seconds, then check the connection:
ls /dev/serial/by-id/*
You should see a device like usb-1a86_USB_Serial-if00-port0. This is the path you’ll use in printer.cfg.
If nothing appears, the board didn’t flash. Common causes: file not named firmware.bin (must be exact), SD card not formatted as FAT32 with 4096-byte allocation, or wrong bootloader offset in the build config.
Step 5: Configure printer.cfg
Navigate to Mainsail in your browser at http://ender3-klipper.local (or the Pi’s IP). Go to Machine → printer.cfg. Start from a reference config from the Klipper repository — these are maintained and tested for common printers:
1. Visit https://github.com/Klipper3d/klipper/tree/master/config
2. Find your printer model (e.g., printer-creality-ender3-v2-2020.cfg)
3. Copy the contents into your printer.cfg
4. Update the [mcu] section with your serial path from Step 4
5. Verify thermistor types match your hardware (most Ender 3 printers use EPCOS 100K B57560G104F)
Save and restart Klipper. From the Mainsail dashboard, run FIRMWARE_RESTART. The printer should connect — you’ll see temperature readings from the bed and hotend.
Step 6: Calibrate and Test
Run the critical calibrations in order:
PID_CALIBRATE HEATER=extruder TARGET=200
PID_CALIBRATE HEATER=heater_bed TARGET=60
SAVE_CONFIG
PROBE_CALIBRATE # If you have a BLTouch/CR Touch
BED_MESH_CALIBRATE
SAVE_CONFIG
Test with a simple print — a 20mm calibration cube at 50mm/s. Klipper’s default kinematics and speeds are conservative; you’ll tune for speed after verifying basic functionality.
Klipper vs Marlin Feature Comparison
| Feature | Marlin | Klipper | Winner |
|---|---|---|---|
| Configuration changes | Recompile firmware (5-15 min) | Edit printer.cfg + RESTART (10 seconds) | Klipper |
| Pressure Advance | Linear Advance (M900) — limited by 8-bit MCU speed | Pressure Advance — computed on Pi, zero MCU load | Klipper |
| Input Shaping | Not natively supported | Built-in ADXL345 support with resonance graphs | Klipper |
| Web Interface | OctoPrint (separate install) | Mainsail/Fluidd (integrated, faster) | Klipper |
| MCU Compatibility | Wide support, most boards ship with Marlin | Requires Klipper firmware build per board | Marlin |
| LCD Support | Full native LCD support | Limited — stock LCDs require custom config | Marlin |
| Print Recovery | Power-loss recovery built in | Power-loss via moonraker plugin | Comparable |
| Community Configs | Thousands of pre-built configs | Well-maintained reference configs for popular printers | Comparable |
| Learning Curve | Gentle — GUI configuration tools available | Steep — everything is text-based config files | Marlin |
Common Mistakes & How to Avoid Them
Mistake 1: Flashing the Wrong Bootloader Offset
The difference between 28KiB and 32KiB bootloader offset on Creality 4.2.x boards is the difference between a successful flash and a brick. The board won’t respond, won’t show on USB, and you’ll think you killed it.
Fix: The Creality 4.2.2 and 4.2.7 boards use 28KiB offset. If the flash fails, reflash the stock Marlin firmware via SD card (the bootloader isn’t overwritten by a bad Klipper flash — it’s in protected flash). Format the card, copy firmware.bin again, and retry.
Mistake 2: Not Setting Up the Serial Connection Correctly
Using /dev/ttyUSB0 instead of the /dev/serial/by-id/... path. The ttyUSB naming can change between reboots if you have multiple USB devices. Your printer works today and fails tomorrow because the Pi assigned it a different device number.
Fix: Always use the /dev/serial/by-id/ path in printer.cfg. This is a stable symlink based on the USB device’s unique ID and won’t change across reboots.
Mistake 3: Copying printer.cfg From a Different Board Revision
Ender 3 V2 configs differ from Ender 3 Pro configs, and both differ from Ender 3 V2 Neo configs. The pin assignments for heaters, thermistors, and fans change between revisions. Loading the wrong reference config can connect a 24V heater to a thermistor input or leave the part cooling fan permanently off.
Fix: Match the reference config to your exact board and printer revision. The board version is printed on the PCB — open the electronics enclosure and read it. Don’t guess based on the printer name on the front.
Mistake 4: Skipping PID Tuning After Migration
Klipper uses different PID constants than Marlin because the control loop runs at a different rate. Running Marlin PID values on Klipper causes 3-5°C temperature oscillation that ruins first layer consistency.
Fix: Run PID_CALIBRATE for both hotend and bed immediately after migration. Takes 5 minutes and eliminates the most common cause of “Klipper prints worse than Marlin” complaints.
⚠️ Safety Notice: 3D printers operate at high temperatures and involve mains-voltage electrical components. Follow the latest 2026 electrical safety standards when installing a Raspberry Pi inside or adjacent to your printer’s electronics enclosure. Use a properly rated power supply, ensure adequate ventilation, and never leave a printer unattended during operation. Verify all wiring connections before applying power. Fire safety standards and electrical certifications vary by country — consult your local regulations.
Klipper’s real power comes from the ecosystem it unlocks. For auto bed leveling integration, our BLTouch/CR Touch installation guide covers Klipper-specific probe configuration. And if you’re upgrading your printer’s extruder alongside the firmware migration, see our dual gear extruder upgrade guide for e-step calibration in Klipper.
Klipper runs best on a reliable single-board computer and a compatible control board. We stock Raspberry Pi kits, BTT SKR Mini E3 boards, and ADXL345 accelerometers at uavmodel — everything you need for a complete Klipper migration in one order.