# Bambu Studio U1 Preheat Bridge — automatic preheating and filament mapping **URL:** \ **Category:** Mods & Builds\ **Created:** [October 9, 2026, 8:14am UTC](https://forum.snapmaker.com/t/bambu-studio-u1-preheat-bridge-automatic-preheating-and-filament-mapping/43586 "2026-10-09T08:14:34Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![jryan15](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/jryan15/32/36683_2.png) [@jryan15](https://forum.snapmaker.com/u/jryan15)\ **Post date:** [October 9, 2026, 8:14am UTC](https://forum.snapmaker.com/t/bambu-studio-u1-preheat-bridge-automatic-preheating-and-filament-mapping/43586/1 "2026-10-09T08:14:34Z")
Hi all! I’ve been using VitasGuo’s Bambu Studio compatibility project for the U1 and it has been a huge quality of life improvement for me. With some help from GPT, I put together a fork with a few improvements I wanted and thought I would share it 🙂 The main one is automatic nozzle preheating. Instead of waiting until a color is finished to start heating the next nozzle, the bridge adds commands to start heating ahead of the swap. I’ve tested this on my U1 and it has made a big difference in the waiting between colors. The preheating lead time is configurable too. It defaults to 30 seconds before the tool change, but you can adjust it in the bridge settings if your nozzles need more or less time. There are also some filament mapping improvements: - The confirmation screen only shows filaments actually used in the print. - Your model can use filament slots like 2, 5, 8, and 9, and you can map those to any of the four toolheads. - **You can now use 5+ filaments in a print:** map multiple colors to the same toolhead to use the same loaded filament, or add a pause in the slicer to manually swap spools when a new color is needed. - Pauses added in the slicer are preserved so you can manually replace filament. There is a warning if more than four filaments are used without a pause. Gcode conversion is also automatic when using Print or Upload, so you don’t have to manually export, convert, and upload the file. A couple things to know: preheating currently works when starting through the bridge’s Print/Device confirmation screen. Files started from the printer touchscreen may still wait for heat. My five-color touchscreen test also failed after the fourth toolhead check, including when I tried native Snapmaker Orca gcode, so that is still unresolved. **Download and release notes:** > **[Release 5.48.0-u1.2 — Windows Installer Fix and Dependency Cleanup ·...](https://github.com/jryan15/BambuStudio-SnapmakerU1-Preheat-Bridge/releases/tag/v5.48.0-u1.2)** > > Fixes the Windows upgrade installer and retains automatic preheating, flexible filament mapping, and automatic G-code preparation. > Fixes > > Stops the running bridge before replacing its files. > Keeps ... Under Assets, download the Windows ZIP, extract it, and run install.bat as administrator with Bambu Studio closed and the printer idle. This revision has been tested on Windows. **VitasGuo’s original project and discussion:** > [@Snapmaker U1 BambuStudio 兼容包](https://forum.snapmaker.com/t/snapmaker-u1-bambustudio/41966): > > Hi everyone， 因为想使用一些bambu studio 的切片功能，我使用vibe coding 开发了一个兼容包。可以让bambu studio 配置U1进行切片，并且可以局域网模式下实现直接打印。 我是一个编程新手，可能还有一些bug。欢迎体验，也非常欢迎大家能fork这个项目进行继续的开发。 项目地址：[VitasGuo/BambuStudio-SnapmakerU1-Compat: 让 BambuStudio 支持 Snapmaker U1 打印机的切片配置与\*\*局域网直连打印\*\*。](https://github.com/VitasGuo/BambuStudio-SnapmakerU1-Compat) All credit to VitasGuo for the original project! I’m new to the GitHub side of this, but the latest version installed successfully and is printing with preheating working on my machine. If you give it a try, please share how it goes and any issues you run into. ---
**Author:** ![nilose2014](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/nilose2014/32/35224_2.png) [@nilose2014](https://forum.snapmaker.com/u/nilose2014)\ **Post date:** [October 9, 2026, 9:17am UTC](https://forum.snapmaker.com/t/bambu-studio-u1-preheat-bridge-automatic-preheating-and-filament-mapping/43586/2 "2026-10-09T09:17:48Z")
> [@jryan15](#): > > The main feature is the automatic nozzle preheating. Instead of waiting for one color to finish before starting to heat the next nozzle, the bridge adds commands to begin heating before the switch. Sorry, but isn’t this already enabled in Orca, if I’m not mistaken? Or at least, before I switch to the next color, it preheats the nozzle to the required temperature for the change, so I don’t have to wait. ---
**Author:** ![MasterPrinter1](https://avatars.discourse-cdn.com/v4/letter/m/f0a364/32.png) [@MasterPrinter1](https://forum.snapmaker.com/u/MasterPrinter1)\ **Post date:** [October 9, 2026, 3:06pm UTC](https://forum.snapmaker.com/t/bambu-studio-u1-preheat-bridge-automatic-preheating-and-filament-mapping/43586/3 "2026-10-09T15:06:47Z")
curious how the bridge times the 30s preheat lead, does it scan ahead for the next tool number or watch the commands stream by lol