Description
The 2004 Switching Motor Unit is a compact stepper motor with a pre-installed hall sensor board, mounted on the extruder rear cover of dual-nozzle toolheads. It drives the mechanism that switches between the left and right hotend and filament channels. If it fails, the printer cannot change active nozzles and dual-material printing stops.
Features:
Nozzle Switching Drive: Powers the mechanism that changes the printer between its left and right hotend and filament channels.
Pre-Installed Hall Sensor Board: Position sensing comes fitted to the unit, so there is no separate sensor to source or calibrate.
Compact Stepper Design: Sized to mount directly on the extruder rear cover without altering the toolhead layout.
Restores Dual-Material Printing: Fixes the fault that stops multi-colour and multi-material jobs entirely.
Covers Three Printers: One part serves the H2D, H2D Pro, and H2C.
When to Replace: HMS error reporting the extruder switching motor working abnormally, failure to switch between left and right nozzle, grinding or stalling noise during nozzle changeover, or hall sensor open and short circuit errors.
Guided Installation: Requires opening the toolhead and removing the extruder rear cover, with a step-by-step guide on the Bambu Lab Wiki.
Specifications:
Compatibility: H2D, H2D Pro, H2C
Part Number: FAM014
