Version: 2.1.x

Slicer Configuration

Prusa Slicer
Super Slicer
Orca Slicer
Cura
Simplify 3D V5
IdeaMaker
Slicer thumbnails

Macros

RatOS comes with START_PRINT and END_PRINT macros that you can call directly from your slicers. This way the printer knows how to start a print, and you can there easily switch between slicers without worrying if you changed anything in another slicer. The g-code for these macros are found in config/RatOS/macros.cfg

Disable any "advanced extruder pressure" settings

Some slicers advertise an "advanced extruder pressure" capability. It is recommended to keep these options disabled when using Klipper as they are likely to result in poor quality prints. Consider using Klipper's pressure advance instead.

Specifically, these slicer settings can instruct the firmware to make wild changes to the extrusion rate in the hope that the firmware will approximate those requests and the printer will roughly obtain a desirable extruder pressure. Klipper, however, utilizes precise kinematic calculations and timing. When Klipper is commanded to make significant changes to the extrusion rate it will plan out the corresponding changes to velocity, acceleration, and extruder movement - which is not the slicer's intent. The slicer may even command excessive extrusion rates to the point that it triggers Klipper's maximum extrusion cross-section check.

In contrast, it is okay (and often helpful) to use a slicer's "retract" setting, "wipe" setting, and/or "wipe on retract" setting.

Prusa Slicer

Prusa Slicer comes with full IDEX support and is the recommended slicer for all RatRig printers.

info

You should be using "Klipper" as the gcode flavor and have the "Use relative E distances" box checked in Printer Settings -> General -> Advanced.

info

This is the ONLY gcode you need, delete everything else. Copy paste the following as is. Make sure the box labeled "Emit temperature commands automatically" is unchecked under "Start G-Code options".

Configuration

Select Klipper in Printer Settings -> General -> Firmware -> G-code Flavor
Enable Use relative E distances in Printer Settings -> General -> Advanced
Disable Arc fitting in Print Settings -> Advanced -> Slicing

Additional IDEX Configuration

Select 2 in Printer Settings -> General -> Capabilities -> Extruder
Disable Single Extruder Multi Material in Printer Settings -> General -> Capabilities

GCode Settings

Start GCode for single toolhead printers

info

Make sure the box labeled "Emit temperature commands automatically" is unchecked under "Start G-Code options".

START_PRINT EXTRUDER_TEMP={first_layer_temperature[0]} EXTRUDER_OTHER_LAYER_TEMP={temperature[0]} BED_TEMP=[first_layer_bed_temperature] START_CHAMBER_TEMP=[chamber_temperature] CHAMBER_TEMP=[chamber_temperature] TOTAL_LAYER_COUNT={total_layer_count} X0={first_layer_print_min[0]} Y0={first_layer_print_min[1]} X1={first_layer_print_max[0]} Y1={first_layer_print_max[1]}

Start GCode for IDEX printers

info

Make sure the box labeled "Emit temperature commands automatically" is unchecked under "Start G-Code options".

START_PRINT EXTRUDER_TEMP={first_layer_temperature[0]},{first_layer_temperature[1]} EXTRUDER_OTHER_LAYER_TEMP={temperature[0]},{temperature[1]} BED_TEMP=[first_layer_bed_temperature] START_CHAMBER_TEMP=[chamber_temperature] CHAMBER_TEMP=[chamber_temperature] INITIAL_TOOL={initial_tool} TOTAL_LAYER_COUNT={total_layer_count} X0={first_layer_print_min[0]} Y0={first_layer_print_min[1]} X1={first_layer_print_max[0]} Y1={first_layer_print_max[1]}

End GCode

END_PRINT

Before layer change GCode

;BEFORE_LAYER_CHANGE
;[layer_z]

After layer change GCode

;AFTER_LAYER_CHANGE
;[layer_z]
G92 E0
_ON_LAYER_CHANGE LAYER={layer_num + 1}

Tool change GCode for IDEX printers

T[next_extruder]

Between objects GCode

;BETWEEN_OBJECTS
G92 E0

Start filament GCode

; Filament gcode
SET_PRESSURE_ADVANCE ADVANCE=0.05

Pause GCode

PAUSE

Super Slicer

Super Slicer supports IDEX printers, but it is not recommended to use.

info

You should be using "Klipper" as the gcode flavor and have the "Only custom Start G-Code" box checked in Printer Settings -> Custom G-Code and "Use relative E distances" box checked in Printer Settings -> General -> Advanced.

info

This is the ONLY gcode you need, delete everything else. Copy paste the following as is.

Configuration

Select Klipper in Printer Settings -> General -> Firmware -> G-code Flavor
Enable Use relative E distances in Printer Settings -> General -> Advanced
Enable Only custom Start G-Code in Printer Settings -> Custom G-Code
Disable Arc fitting in Printer Settings -> General -> Firmware

Additional IDEX Configuration

Select 2 in Printer Settings -> General -> Capabilities -> Extruder
Disable Single Extruder Multi Material in Printer Settings -> General -> Capabilities

GCode Settings

Start GCode for single toolhead printers

G90
G21
SET_GCODE_VARIABLE MACRO="RatOS" variable="relative_extrusion" VALUE="True"
START_PRINT EXTRUDER_TEMP={first_layer_temperature[0]} EXTRUDER_OTHER_LAYER_TEMP={temperature[0]} BED_TEMP=[first_layer_bed_temperature] CHAMBER_TEMP=[chamber_temperature] TOTAL_LAYER_COUNT={total_layer_count} X0={first_layer_print_min[0]} Y0={first_layer_print_min[1]} X1={first_layer_print_max[0]} Y1={first_layer_print_max[1]}

Start GCode for IDEX printers

G90
G21
SET_GCODE_VARIABLE MACRO="RatOS" variable="relative_extrusion" VALUE="True"
START_PRINT EXTRUDER_TEMP={first_layer_temperature[0]},{first_layer_temperature[1]} EXTRUDER_OTHER_LAYER_TEMP={temperature[0]},{temperature[1]} BED_TEMP=[first_layer_bed_temperature] START_CHAMBER_TEMP=[chamber_minimal_temperature] CHAMBER_TEMP=[chamber_temperature] INITIAL_TOOL={initial_tool} TOTAL_LAYER_COUNT={total_layer_count} X0={first_layer_print_min[0]} Y0={first_layer_print_min[1]} X1={first_layer_print_max[0]} Y1={first_layer_print_max[1]}

End GCode

END_PRINT

Before layer change GCode

;BEFORE_LAYER_CHANGE
;[layer_z]

After layer change GCode

;AFTER_LAYER_CHANGE
;[layer_z]
G92 E0
_ON_LAYER_CHANGE LAYER={layer_num + 1}

Tool change GCode for IDEX printers

T[next_extruder]

Between objects GCode

;BETWEEN_OBJECTS
G92 E0

Start filament GCode

; Filament gcode
SET_PRESSURE_ADVANCE ADVANCE=0.05

Pause GCode

PAUSE

Orca Slicer

Orca Slicer supports IDEX printers, but it is not recommended to use.

info

You should be using "Klipper" as the gcode flavor and have the "Use relative E distances" box checked in in Printer Settings -> Advance.

info

This is the ONLY gcode you need, delete everything else. Copy paste the following as is.

Configuration

Select Klipper in Printer Settings -> Advanced -> G-code Flavor
Enable Use relative E distances in Printer Settings -> Advanced
Disable Arc fitting in Quality -> Precision

Additional IDEX Configuration

Add a secondary Filament in Main UI -> Filament

GCode Settings

Start GCode for single toolhead printers

START_PRINT EXTRUDER_TEMP={first_layer_temperature[0]} EXTRUDER_OTHER_LAYER_TEMP={nozzle_temperature[0]} BED_TEMP=[bed_temperature_initial_layer_single] CHAMBER_TEMP={overall_chamber_temperature} TOTAL_LAYER_COUNT={total_layer_count} X0={adaptive_bed_mesh_min[0]} Y0={adaptive_bed_mesh_min[1]} X1={adaptive_bed_mesh_max[0]} Y1={adaptive_bed_mesh_max[1]}

Start GCode for IDEX printers

START_PRINT EXTRUDER_TEMP={first_layer_temperature[0]},{first_layer_temperature[1]} EXTRUDER_OTHER_LAYER_TEMP={nozzle_temperature[0]},{nozzle_temperature[1]} BED_TEMP=[bed_temperature_initial_layer_single] CHAMBER_TEMP={overall_chamber_temperature} INITIAL_TOOL={initial_tool} TOTAL_LAYER_COUNT={total_layer_count} X0={adaptive_bed_mesh_min[0]} Y0={adaptive_bed_mesh_min[1]} X1={adaptive_bed_mesh_max[0]} Y1={adaptive_bed_mesh_max[1]}

End GCode

END_PRINT

Before layer change GCode

;BEFORE_LAYER_CHANGE
;[layer_z]

Layer change GCode

;AFTER_LAYER_CHANGE
;[layer_z]
G92 E0
_ON_LAYER_CHANGE LAYER={layer_num + 1}

Change filament GCode for IDEX printers

T{next_extruder}

Printing by object GCode

;BETWEEN_OBJECTS
G92 E0

Filament start GCode

; Filament gcode

Pause GCode

PAUSE

Cura

Cura does not support RatRig IDEX printers.

info

This is the ONLY gcode you need, delete everything else. Copy paste the following as is.

info

The "coasting" feature is likely to result in poor quality prints with Klipper. Consider using Klipper's pressure advance instead.

Specifically, if the slicer dramatically changes the extrusion rate between moves then Klipper will perform deceleration and acceleration between moves. This is likely to make blobbing worse, not better.

In contrast, it is okay (and often helpful) to use a slicer's "retract" setting, "wipe" setting, and/or "wipe on retract" setting.

Machine start gcode

START_PRINT EXTRUDER_TEMP={material_print_temperature_layer_0} BED_TEMP={material_bed_temperature_layer_0} X0=%MINX% Y0=%MINY% X1=%MAXX% Y1=%MAXY%

machine end gcode

END_PRINT

To make adaptive meshing work with Cura you need to install a post processing plugin

in cura open menu Help -> Show configuration folder
Copy the following and save it as MeshPrintSize.py in the scripts folder

# --------------------------------------------------------------------------------
# Original Version from https://gist.github.com/frankbags
# https://gist.github.com/frankbags/c85d37d9faff7bce67b6d18ec4e716ff
#
# Modified version from https://github.com/kmarty
# https://github.com/kmarty/klipper_config_km_addons/blob/master/bed_mesh_calibrate/MeshPrintSize.py
#
# thank you frankbags and kmarty!
# --------------------------------------------------------------------------------

import re #To perform the search and replace.

from ..Script import Script

class MeshPrintSize(Script):

    def getSettingDataString(self):
        return """{
            "name": "Mesh Print Size",
            "key": "MeshPrintSize",
            "metadata": {},
            "version": 2,
            "settings":{}
        }"""

    def execute(self, data):
        minMaxXY = {'MINX':0,'MINY':0,'MAXX':0,'MAXY':0}
        re_pattern = re.compile(r'%(' + r'|'.join(minMaxXY.keys()) + r')%')
        minmax_counter = len(minMaxXY)

        for i in range(len(data)):
            # in Cura "layer' != "line" :-(
            for k,v in minMaxXY.items():
                if minmax_counter:
                    result = re.search(r';' + k + r':\s*(\d*\.\d+|\d+)', data[i])
                    if result:
                        minMaxXY[k] = result.group(1)
                        minmax_counter -= 1
                else:
                    if re_pattern.search(data[i]):
                        data[i] = re.sub(r'%' + k + r'%', v, data[i])

        return data

restart cura
in cura open menu Extensions -> Post processing -> Modify G-Code and select Mesh Print Size

Simplify 3D V5

Simplify 3D does not support RatRig IDEX printers.

info

This is the ONLY gcode you need, delete everything else. Copy paste the following as is.

Start GCode

START_PRINT EXTRUDER_TEMP=[extruder0_temperature] BED_TEMP=[bed0_temperature] X0=[build_min_x] Y0=[build_min_y] X1=[build_max_x] Y1=[build_max_y]

End GCode

END_PRINT

IdeaMaker

IdeaMaker does not support RatRig IDEX printers.

info

This is the ONLY gcode you need, delete everything else. Copy paste the following as is.

Start GCode

START_PRINT EXTRUDER_TEMP={temperature_extruder1} BED_TEMP={temperature_heatbed} X0={print_pos_min_x} Y0={print_pos_min_y} X1={print_pos_max_x} Y1={print_pos_max_y}

End GCode

END_PRINT

tip

IdeaMaker will complain there's no heating commands, you can safely ignore this.

Slicer thumbnails

See the Mainsail documentation: G-Code Thumbnails in Mainsail

Macros​

Disable any "advanced extruder pressure" settings​

Prusa Slicer​

Configuration​

Additional IDEX Configuration​

GCode Settings​

Super Slicer​

Configuration​

Additional IDEX Configuration​

GCode Settings​

Orca Slicer​

Configuration​

Additional IDEX Configuration​

GCode Settings​

Cura​

Simplify 3D V5​

IdeaMaker​

Slicer thumbnails​

Macros

Disable any "advanced extruder pressure" settings

Prusa Slicer

Configuration

Additional IDEX Configuration

GCode Settings

Super Slicer

Configuration

Additional IDEX Configuration

GCode Settings

Orca Slicer

Configuration

Additional IDEX Configuration

GCode Settings

Cura

Simplify 3D V5

IdeaMaker

Slicer thumbnails