U1 Firmware Updates & Release Notes

Download Link

Download V1.5.2 Beta

How to update the firmware?

Click the link above to download the latest firmware and save it to a USB drive.

Insert the USB drive into the printer, then go to Settings > About > Firmware Version > Local Update.

Select the firmware package file, then tap Confirm in the pop-up window.

Bug Fixes

1. Fixed an issue introduced in V1.5.0 where, in some cases, the first layer was overly squished when Heated Bed Leveling was not enabled before printing.
2. Fixed an issue where the nozzle diameter could be incorrect in some cases.

Next Steps

After installing this firmware version, please complete the following steps:

• Run Multi-Toolhead Offset Calibration again with no filament loaded in any toolhead.
• Before starting a print, make sure Heated Bed Leveling is enabled so the printer performs bed leveling automatically before printing.

When using firmware V1.5.0, it is recommended to use it with Snapmaker Orca V2.3.1 (or later), or Snapmaker App V2.3.2 (or later).

New Features

1. Added Top Cover features.
   • Added a setup wizard for first-time Top Cover connection.
   • Prompt users to recalibrate Vibration Compensation after the Top Cover is connected.
   • Support adjusting the Top Cover fan speed from the Control page.
   • Support viewing the Top Cover air purifier's total operating time and filter replacement guidance under Settings > Maintenance > Usage Statistics.

Top Cover features require Snapmaker Orca V2.3.5. This version is scheduled for release on July 8, 2026. Stay tuned!

1. Added the Allow auto-refill with different colors option for Auto-Refill. You can enable it under Settings > Print Preferences.
2. When spaghetti or foreign objects are detected, users can now upload AI detection data to help us further improve detection accuracy.
3. Added support for German and Hebrew.
4. Added support for the Snapmaker TPU 90A and Snapmaker PLA Silk filament types.

Bug Fixes

1. Fixed an issue where unexpected circular icons occasionally appeared when configuring the toolhead on the Filament Setup page.
2. Fixed an issue where the displayed X/Y/Z axis coordinates on the Control page could be inaccurate.

Improvements

1. Improved system performance to reduce the occurrence of the "Timer too close" error.

When using firmware V1.4.1, it is recommended to use it with Snapmaker Orca V2.3.1 (or later), or Snapmaker App V2.3.2 (or later).

Bug Fixes

• Fixed an issue where filament runout detection failed to trigger an automatic print pause under certain conditions.
  This could occur when a new print was started after canceling the previous one. If filament ran out during the new print, the printer might not pause automatically.
• Fixed an issue where AI defect detection did not function properly when the camera was obstructed.
• Fixed an issue where filament information was occasionally not recognized after a device restart.
  This could occur if "Auto Loading" was disabled and the filament status was "Loaded" before restarting the device.

When using firmware V1.4.0, it is recommended to use it with Snapmaker Orca V2.3.1 (or later), or Snapmaker App V2.3.2 (or later).

New Features

• Added Traditional Chinese and Russian language support.
• Added LED Off After Print option in Settings > Print Preferences.

Bug Fixes

• Fixed an issue where the number of objects was not fully displayed in the Skip Object feature.
• Fixed an issue where an excessively long extrusion occasionally occurred after using the Skip Object feature.

Improvements

• Increased the maximum number of supported objects in the Skip Object feature to 64.
• Updated the AI defect detection model to improve detection workflow and user experience.
• Improved system performance and stability, and reduced MCU control timeout issues.

When using firmware V1.3.0 or above, it is recommended to use it with Snapmaker Orca V2.3.1 (or above), or Snapmaker App V2.3.2 (or above).

New Features

1. Added support for multiple nozzle diameters (0.2mm / 0.4mm / 0.6mm / 0.8mm).

Nozzle information is now editable. On the touchscreen, navigate to Settings > Maintenance > Toolhead Info > Modify the corresponding nozzle diameter > Save.

After replacing the nozzle, please perform Multi-toolhead Offset Calibration and Heated Bed Leveling to ensure print accuracy.

1. Added nozzle usage rules. To prevent printing anomalies caused by improper configuration of different nozzles, the following safety restrictions are included:

• Auto-refill is prohibited between nozzles of different diameters.
• The nozzle diameter specified in the G-code file cannot be mapped to the toolhead with a different diameter nozzle.

1. Enhanced network management, supporting connection to hidden SSID networks.

Bug Fixes

1. Fixed an issue where the "Unedited Filament" error message persisted.

2. Optimized the communication protocol in Cloud Mode to resolve control issues caused by weak network environments. For example, some users encountered situations such as receiving unexpected parameter configuration commands during printing or experiencing delays in receiving print tasks.

Improvements

1. Updated the AI defect detection model.

2. Optimized Pogo Pin continuity detection logic to prevent false detections from pausing print tasks.

3. Improved extrusion flow calibration and updated built-in parameters.

Firmware V1.2.0 and above requires Snapmaker Orca V2.2.4 (or above) or Snapmaker App V2.2.3 (or above).

New Features

• Added "Skip Objects" feature on the screen. To use it, first enable it in Snapmaker Orca under: Process > Global > Others > G-code output > Exclude objects.
• Added Ethernet connection feature. After inserting a USB to Ethernet adapter and connecting an Ethernet cable, the device will prioritize using Ethernet for a more stable network connection.
• Added Root access. Once enabled, users can access the device via SSH for advanced control and management.

Bug Fixes

• Implemented a DNS cache mechanism to avoid frequent repeated domain name resolutions.

Improvements

• Updated material color options to support a wider range of colors.
• Enhanced the defect detection model to reduce false positives and missed detections for spaghetti defects, and improved the detection of static foreign objects on the bed.
• When exporting logs, "Export AI monitoring photos" will be checked by default to facilitate troubleshooting of AI monitoring-related issues (users can uncheck it as needed).
• Added a reminder for bed temperature set to 0°C in the G-code file to prevent printing failures.
• Wi-Fi connection now supports WPA3 encryption.

Firmware V1.1.1 and above requires Snapmaker Orca V2.2.4 (or above) or Snapmaker App V2.2.3 (or above).

New Features

• Added heated bed flatness deviation detection. When abnormal unevenness is detected, the system will guide users through manual leveling to improve first-layer quality.
• Added a new log export path. Logs can now be exported to the logs folder within the Fluidd G-code directory.
• Added new filament types, including Snapmaker PETG HF, Snapmaker TPU 95A HF, Generic PETG HF, and Generic TPU 95A HF. Snapmaker PETG HF and Snapmaker TPU 95A HF will be available in the official online store in a future update.

Bug Fixes

• Fixed an issue where overall print time increased due to constrained motion-control parameters after extrusion flow calibration.
• Fixed an issue where the toolhead was incorrectly detected as loaded during a filament runout pause.

Improvements

• Updated the firmware’s built-in filament parameters.
• Improved print continuity when resuming after a pause.
• Improved alert dialog display. The screen now wakes automatically and stays on when an alert appears.
• Optimized the manual print resume workflow after filament runout. Material information no longer needs to be edited manually.

Firmware V1.1.0 and above requires Snapmaker Orca V2.2.1 (or above) or Snapmaker App V2.2.1 (or above).

New Features

• Added selective flow calibration. Users can choose specific toolhead(s) to perform flow calibration, avoiding redundant calibration on already calibrated toolheads to reduce preparation time.
• Added QR code guidance to certain error message pages. Users can scan the QR code to access the official solution for the corresponding issue, enabling faster troubleshooting.
• Added support for additional official RFID filament types.

Improvements

• Optimized cooling fan control logic to reduce fan noise from idle toolhead(s) during printing.
• Improved the AI defect detection model to reduce false positives.
• Optimized print time calculation logic. The duration shown on the print completion page now reflects the actual printing time, excluding paused time.
• Adjusted Z-axis motor current parameters to increase Z-axis output torque, improving print quality issues caused by insufficient torque.
• Added a medium sensitivity option to the filament tangle detection feature.
• Optimized the UI display for storage space management.
• Auto-Refill is enabled by default after updating the firmware.

Bug Fixes

• Fixed an issue where the firmware could shut down if the start G-code did not include a layer count command.
• Fixed an issue where the nozzle temperature could be modified unexpectedly during pre-extrusion.

Download Link

Download V1.0.0

Firmware V1.0.0 and above requires Snapmaker Orca V2.2.1 (or above) or Snapmaker App V2.2.1 (or above).

New Features

Added AI monitoring. Spaghetti detection and foreign object detection are introduced to identify anomalies during printing.

• The AI Monitoring feature requires Snapmaker Orca V2.2.1 to function properly.
• Currently, Snapmaker Orca V2.2.1 supports push notifications. Snapmaker App V2.2.2 now supports pop-up notifications for AI detection results.

Added homing calibration to address issues where homing or toolhead picking and parking may fail.

Added device maintenance reminders and guidance. Regular maintenance helps ensure print quality and extend the lifespan of SnapSwap system.

Added a filament auto-mapping toggle. This is enabled by default and can be disabled in Settings > Print Preferences.

Added low storage notifications.

Improvements

Optimized homing logic to prevent homing failures.

Refined the manual leveling UI. Icons now flash to indicate users to loosen or tighten screws.

Bug Fixes

Fixed an issue where large file downloads could fail.

Download Link

Download V0.9.0

When using firmware version V0.9.0 or above, use it with Snapmaker Orca version V2.1.1 or above, or Snapmaker App version V2.1.0 or above.

New Features

Enhanced On-Screen Status Display

1. Home Screen - Added Timelapse Status Display

Actively Recording Timelapse

Camera Error Status

1. Home Screen - Added Device Connection Mode Status

LAN Mode

Cloud Mode: Connected to Server

Cloud Mode: Disconnected from Server

Cloud Mode: Abnormal Status

1. New File Download Progress Display for Remote Print Jobs

Note: Currently not supported by LAN files

USB Printing Experience Upgrade

1. Automatic Local Backup of USB Print Files

Files from USB drives are now automatically copied to the device's local storage when printed

Improvements

Improved Connection Stability

Enhanced reliability of remote connections and control

Resolved issues with:

PIN code retrieval failures

OTA information acquisition failures

Inability to recover after cloud connection drops

Energy Efficiency and Noise Control

Automatic shutdown of auxiliary fans and model cooling fans during print pauses

Achieves more energy-efficient and quieter operation during idle periods

Enhanced Print Interruption Experience

Improved model handling logic during pause and resume operations

Significantly better print quality at layer transition points after resuming

Bug Fixes

Fixed an error that occurred when Snapmaker Orca/App attempted to reconnect via LAN after a disconnection.

Resolved speed adjustment failure during multi-color printing

Corrected occasional display of incorrect filenames or thumbnails during printing

Fixed potential system freeze when exiting Wi-Fi configuration interface

Firmware V0.9.4 and above requires Snapmaker Orca V2.1.5 (or above) or Snapmaker App V2.1.5 (or above).

New Features

• Introduced filament entanglement detection sensitivity adjustment.
• Introduced toolhead attach and detach coordinate adjustment.

Improvements

• Optimized UI responsiveness.
• Improved cloud server connection success rate under weak network conditions.
• Show connection failure notifications.
• Increased USB drive file scanning speed.
• Extended purge length during auto-loading to prevent filament color mixing.
• Show cloud connection status on the account page.
• Added a cloud connection error icon on the home screen.
• Fans off before vibration compensation calibration to ensure accuracy.
• Minimum temperature of the active toolhead is set to 170 °C during printing.
• Added a 15-minute screen timeout option and set it as the default.

Bug Fixes

• Enabled controlling of the auxiliary fan via the touchscreen during bed leveling.
• Fixed cloud server connection failure caused by configuration file loading errors.
• Fixed potential Klipper shutdowns when executing abnormal movement commands.
• Fixed print time reset during toolhead changes in multi-color printing.