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Snapmaker U1 — Klipper Configuration

Use at your own risk. This configuration has been extensively tested on my U1 with no issues, but I accept no responsibility for any damage to your printer.

This configuration optimizes the TMC2240 settings for the integrated XY stepper motors, enabling higher speeds and accelerations during tool changes.

Key Changes from Defaults

  • TMC2240 XY motors: Custom chopper tuning (TBL, TOFF, HEND, HSTRT, TPFD, VHIGHFS, VHIGHCHM, PWM_*) for improved high-speed performance
  • Max acceleration: 25,000 mm/s²
  • Max XY velocity: 1,000 mm/s
  • Tool change acceleration: 25,000 mm/s²
  • Tool change speed (fast): 800 mm/s
  • Sensorless homing: TMC2240 (XY) and TMC2209 (Z) with reduced homing current
  • Input shaper (MZV): X = 54 Hz, Y = 47.5 Hz

Requirements

Before using this config, ensure:

  1. Tool dock positions are calibrated correctly
  2. Belt tension is correct
  3. Full printer calibration has been completed
  4. Tool changes work reliably with the stock configuration

Installation

  1. Back up your existing printer.cfg
  2. Copy printer.cfg to /userdata/printer_data/config/printer.cfg on your U1
  3. Restart Klipper
  4. Re-run bed mesh calibration (BED_MESH_CALIBRATE) — the placeholder mesh in this file must be replaced with data from your printer

Test Setup

Component Version
Printer U1 (Kickstarter, without top cover)
Firmware v1.1.1-paxx12-13 (extended)
Slicer Snapmaker OrcaSlicer 2.2.4

Notes

  • The TMC2240 driver temperature readout is unreliable. When active it may read ~20°C higher than the actual value.
  • The bed mesh in SAVE_CONFIG is a placeholder — replace it with your own calibration data.
  • [include extended/klipper/*.cfg] requires the extended Snapmaker Klipper firmware.
  • v1.1.1 requires Snapmaker OrcaSlicer 2.2.4+ or Snapmaker App 2.2.3+.
  • v1.1.1 adds heated bed flatness deviation detection and new filament presets (PETG HF, TPU 95A HF).