First Print

Congratulations on building your 3MS! Now to get started with a first print.

Slicer Setup

This tutorial will walk you through setting up the 3MS with OrcaSlicer. If you use another slicer, some settings may differ.

Credit

This tutorial is based off of the original Happy Hare slicer setup docs, available here.

Machine Settings

Begin by opening your machine settings.

Navigate to Machine G-Code.

Start G-Code

Prepend your Machine start G-code with the following:

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MMU_START_SETUP INITIAL_TOOL={initial_tool} TOTAL_TOOLCHANGES=!total_toolchanges! REFERENCED_TOOLS=!referenced_tools! TOOL_COLORS=!colors! TOOL_TEMPS=!temperatures! TOOL_MATERIALS=!materials! FILAMENT_NAMES=!filament_names! PURGE_VOLUMES=!purge_volumes!
MMU_START_CHECK

Then, append the following below your existing G-code:

MMU_START_LOAD_INITIAL_TOOL
; Optionally add YOUR additional start logic (like purging) here to run just prior to start
SET_PRINT_STATS_INFO TOTAL_LAYER={total_layer_count} ; For pause at layer functionality and better print stats

End G-Code

Prepend your Machine end G-Code with the following:

MMU_END

Then, append the following below your existing G-code:

1	`MMU_PRINT_END ; Only required if using Octoprint`

Layer Change G-Code

Scroll down and edit your layer change G-Code.

Add the following:

_MMU_UPDATE_HEIGHT

; If you want enhanced pausing feature with Happy Hare client macros also add this
SET_PRINT_STATS_INFO CURRENT_LAYER={layer_num} ; For pause at layer functionality and better print stats

Save this machine preset with a new name.

Filament Settings

Filament Cutting vs. Tip Forming

It is highly recommended you install a filament cutter on your printer. This will make your toolchanges much more reliable and negate the tuning tip forming requires.

If you really want to do tip forming, don't follow this section. You will have to tune the values yourself. In general:

Less cooling moves or higher temperature = stringy tips
More cooling moves or lower temperature = blobby tips
Skinnydip string reduction = less strings

Begin by opening your filament settings.

Navigate to Multimaterial.

Disable Tip Forming

Set all the indicated fields to 0 and open the ramming settings. 0f8f127c

Set the ramming time to 0.

Your First Print

This section will cover one way to start multicolor 3D prints. Note that typically, multicolor 3D models will come pre-painted or in multiple parts, so the process will be slightly different.

Begin by loading the model into the slicer.