The hotend used for printing is determined during the slicing process of the model file.

For preloaded models, the correct hotend is already selected at this stage, so it cannot be changed directly from the printer’s screen.

When slicing a file in Bambu Studio and sending it to the printer, you can choose to use the left or right hotend.

For certain materials, such as TPU and PPS/PPA-CF, it is recommended to use specific hotends for optimal print quality.

For more information on filament compatibility with the H2D printer, please refer to the corresponding wiki page.