Slicer Config

Configuring your slicer

The recommended slicer for AFC is OrcaSlicer. Other slicers such as PrusaSlicer or SuperSlicer may be used, and the configuration of options within them is similar but naming or options may be slightly different.

Updating printer settings in Orca

For the printer you are adding BoxTurtle to, first go to the Printer settings, Multimaterial tab and ensure settings are configured as per the below screenshot.

Also, on the Extruder 1 setting page - reduce Retraction while switching material length from the default of 2 to 0.

Adding additional filaments/extruders

Increase the number of filaments to match your BoxTurtle's lane count.

Updating the Machine G-code settings

• Set Machine start G-code appropriately for your printer, specifically adding the TOOL={initial_tool} to your PRINT_START macro.

M104 S0 ; Stops OrcaSlicer from sending temperature waits separately
M140 S0 ; Stops OrcaSlicer from sending temperature waits separately
PRINT_START EXTRUDER=[nozzle_temperature_initial_layer] BED=[bed_temperature_initial_layer_single] TOOL={initial_tool}

• Set Change Filament G-Code to the below value. Remove any other custom code here, e.g. extruder moves.

T[next_extruder] PURGE_LENGTH=[flush_length]
{ if toolchange_count == 1 }SET_AFC_TOOLCHANGES TOOLCHANGES=[total_toolchanges]{endif }
;FLUSH_START
;EXTERNAL_PURGE {flush_length}
;FLUSH_END

Changes when using PrusaSlicer

For the most part, many of the above settings are also applicable to other Slic3r derivatives such as PrusaSlicer or SuperSlicer. Below are a list of some of the deviations. Reth also created a very good summary of the overview of tuning changes for PrusaSlicer in this video.

• Instead of 'Change Filament G-Code', update the 'Tool Change G-Code' in printer settings to the below.

T[next_extruder]
{if layer_num < 0}
SET_AFC_TOOLCHANGES TOOLCHANGES=[total_toolchanges]
{endif}

• Under each extruder in printer settings, change the default value of 'Retraction when tool is disabled' from 10mm to 0.5mm.

Additional Slicer configuration - pre-OrcaSlicer 2.2.0

Configuring per-material filament ramming is no longer required as of the official OrcaSlicer 2.2.0 release ( PR #6934). If you are on an earlier version than that (including betas/release candidates) you will need to make the following additional changes to your slicer configurations.

Material Settings

Ramming Settings

Because the AFC-Klipper-Add-On handles any tip forming in the extension, we need to disable these specific settings in the slicer software. Below is a screenshot for OrcaSlicer, but most Slic3r-based slicers have a similar dialog/setting.