This print_start macro will pass data from your slicer to your printer and perform all necessary preflight commands for a successful print on your Voron printer running Klipper. This means heatsoak, QGL/Z-tilt, bed mesh and a primeline before each print.
This macro requires you to have a chamber thermistor. This is necessary to achieve your set chamber temp in your slicer.
You need to update your "Start G-code" in your slicer to be able to send data from slicer to this macro. Click on the slicer you use below and read the instructions.
SuperSlicer
In Superslicer go to "Printer settings" -> "Custom g-code" -> "Start G-code" and update it to:M104 S0 ; Stops SuperSlicer from sending temp waits separately
M140 S0
print_start EXTRUDER=[first_layer_temperature] BED=[first_layer_bed_temperature] CHAMBER=[chamber_temperature]
OrcaSlicer
In OrcaSlicer go to "Printer settings" -> "Machine start g-code" and update it to:M104 S0 ; Stops OrcaSlicer from sending temp waits separately
M140 S0
print_start EXTRUDER=[first_layer_temperature] BED=[first_layer_bed_temperature] CHAMBER=[chamber_temperature]
PrusaSlicer
In PrusaSlicer go to "Printer settings" -> "Custom g-code" -> "Start G-code" and update it to:
M104 S0 ; Stops PrusaSlicer from sending temp waits separately
M140 S0
print_start EXTRUDER=[first_layer_temperature[initial_extruder]] BED=[first_layer_bed_temperature] CHAMBER=[chamber_temperature]
Cura
In Cura go to "Settings" -> "Printer" -> "Manage printers" -> "Machine settings" -> "Start G-code" and update it to:
print_start EXTRUDER={material_print_temperature_layer_0} BED={material_bed_temperature_layer_0} CHAMBER={build_volume_temperature}
The print_start macro has predefined names for nevermore and chamber thermistor. Make sure that yours are named correctly. In your printer.cfg file verify the following:
Chamber thermistor: Make sure chamber thermistor is named "chamber" and update XXX.
[temperature_sensor chamber]
sensor_type: XXX
sensor_pin: XXX
Nevermore: Make sure nevermore is named "nevermore" and update XXX.
[output_pin nevermore]
pin: XXX
value: 0
shutdown_value: 0
Remember to add SET_PIN PIN=nevermore VALUE=0 to your print_end macro to turn the nevermore off.
Warning
The macro was updated recently (2024-09-07). If you run in to any issues then please let me know by opening a issue on github.
Copy this macro and replace your old print_start macro in your printer.cfg. Then read through and uncomment parts of this macro.
#####################################################################
# A better print_start macro for v2/trident
#####################################################################
## *** THINGS TO UNCOMMENT: ***
## Bed mesh (2 lines at 2 locations)
## Nevermore (if you have one)
## Z_TILT_ADJUST (For Trident only)
## QUAD_GANTRY_LEVEL (For V2.4 only)
## Beacon Contact logic (if you have one. 4 lines at 4 locations)
[gcode_macro PRINT_START]
gcode:
# This part fetches data from your slicer. Such as bed, extruder, and chamber temps and size of your printer.
{% set target_bed = params.BED|int %}
{% set target_extruder = params.EXTRUDER|int %}
{% set target_chamber = params.CHAMBER|default("45")|int %}
{% set x_wait = printer.toolhead.axis_maximum.x|float / 2 %}
{% set y_wait = printer.toolhead.axis_maximum.y|float / 2 %}
## Uncomment for Beacon Contact (1 of 4 for beacon contact)
#SET_GCODE_OFFSET Z=0 # Set offset to 0
# Home the printer, set absolute positioning and update the Stealthburner LEDs.
STATUS_HOMING # Set LEDs to homing-mode
G28 # Full home (XYZ)
G90 # Absolute position
## Uncomment for bed mesh (1 of 2 for bed mesh)
#BED_MESH_CLEAR # Clear old saved bed mesh (if any)
# Check if the bed temp is higher than 90c - if so then trigger a heatsoak.
{% if params.BED|int > 90 %}
SET_DISPLAY_TEXT MSG="Bed: {target_bed}c" # Display info on display
STATUS_HEATING # Set LEDs to heating-mode
M106 S255 # Turn on the PT-fan
## Uncomment if you have a Nevermore.
#SET_PIN PIN=nevermore VALUE=1 # Turn on the nevermore
G1 X{x_wait} Y{y_wait} Z15 F9000 # Go to center of the bed
M190 S{target_bed} # Set the target temp for the bed
SET_DISPLAY_TEXT MSG="Heatsoak: {target_chamber}c" # Display info on display
TEMPERATURE_WAIT SENSOR="temperature_sensor chamber" MINIMUM={target_chamber} # Waits for chamber temp
# If the bed temp is not over 90c, then skip the heatsoak and just heat up to set temp with a 5 min soak
{% else %}
SET_DISPLAY_TEXT MSG="Bed: {target_bed}c" # Display info on display
STATUS_HEATING # Set LEDs to heating-mode
G1 X{x_wait} Y{y_wait} Z15 F9000 # Go to center of the bed
M190 S{target_bed} # Set the target temp for the bed
SET_DISPLAY_TEXT MSG="Soak for 5 min" # Display info on display
G4 P300000 # Wait 5 min for the bedtemp to stabilize
{% endif %}
# Heat hotend to 150c. This helps with getting a correct Z-home.
SET_DISPLAY_TEXT MSG="Hotend: 150c" # Display info on display
M109 S150 # Heat hotend to 150c
## Uncomment for Beacon contact (2 of 4 for beacon contact)
#G28 Z METHOD=CONTACT CALIBRATE=1 # Calibrate z offset and beacon model
## Uncomment for Trident (Z_TILT_ADJUST)
#SET_DISPLAY_TEXT MSG="Leveling" # Display info on display
#STATUS_LEVELING # Set LEDs to leveling-mode
#Z_TILT_ADJUST # Level the printer via Z_TILT_ADJUST
#G28 Z # Home Z again after Z_TILT_ADJUST
## Uncomment for V2.4 (Quad gantry level AKA QGL)
#SET_DISPLAY_TEXT MSG="Leveling" # Display info on display
#STATUS_LEVELING # Set LEDs to leveling-mode
#QUAD_GANTRY_LEVEL # Level the printer via QGL
#G28 Z # Home Z again after QGL
## Uncomment for bed mesh (2 of 2 for bed mesh)
#SET_DISPLAY_TEXT MSG="Bed mesh" # Display info on display
#STATUS_MESHING # Set LEDs to bed mesh-mode
#BED_MESH_CALIBRATE # Start the bed mesh (add ADAPTIVE=1) for adaptive bed mesh
## Uncomment for Beacon Contact (3 of 4 for beacon contact)
#G28 Z METHOD=CONTACT CALIBRATE=0 # Calibrate z offset only with hot nozzle
# Heat up the hotend up to target via data from slicer
SET_DISPLAY_TEXT MSG="Hotend: {target_extruder}c" # Display info on display
STATUS_HEATING # Set LEDs to heating-mode
G1 X{x_wait} Y{y_wait} Z15 F9000 # Go to center of the bed
M107 # Turn off partcooling fan
M109 S{target_extruder} # Heat the hotend to set temp
## Uncomment for Beacon Contact (4 of 4 for beacon contact)
#SET_GCODE_OFFSET Z=0.06 # Add a little offset for hotend thermal expansion
# Get ready to print by doing a primeline and updating the LEDs
SET_DISPLAY_TEXT MSG="Printer goes brr" # Display info on display
STATUS_PRINTING # Set LEDs to printing-mode
G0 X{x_wait - 50} Y4 F10000 # Go to starting point
G0 Z0.4 # Raise Z to 0.4
G91 # Incremental positioning
G1 X100 E20 F1000 # Primeline
G90 # Absolute position
Copy this macro and replace the old print_start macro in your printer.cfg. Then read through and uncomment parts of this macro.
#####################################################################
# A better print_start macro for v0
#####################################################################
## *** THINGS TO UNCOMMENT: ***
## Nevermore (if you have one)
[gcode_macro PRINT_START]
gcode:
# Fetches data from your slicer. Such as bed temp, extruder temp, chamber temp and size of your printer.
{% set target_bed = params.BED|int %}
{% set target_extruder = params.EXTRUDER|int %}
{% set target_chamber = params.CHAMBER|default("45")|int %}
{% set x_wait = printer.toolhead.axis_maximum.x|float / 2 %}
{% set y_wait = printer.toolhead.axis_maximum.y|float / 2 %}
# Homes the printer and sets absolute positioning
G28 # Full home (XYZ)
G90 # Absolute position
# Checks if the bed temp is higher than 90c - if so then trigger a heatsoak
{% if params.BED|int > 90 %}
M106 S255 # Turn on the PT-fan
## Uncomment if you have a Nevermore.
#SET_PIN PIN=nevermore VALUE=1 # Turn on the nevermore
G1 X{x_wait} Y{y_wait} Z15 F9000 # Go to center of the bed
M190 S{target_bed} # Set target temp for the bed
TEMPERATURE_WAIT SENSOR="temperature_sensor chamber" MINIMUM={target_chamber} # Wait for chamber temp
# If the bed temp is not over 90c it skips the heatsoak and just heats up to set temp with a 1 min soak.
{% else %}
G1 X{x_wait} Y{y_wait} Z15 F9000 # Go to center of the bed
M190 S{target_bed} # Set target temp for the bed
G4 P300000 # Wait 5 min for the bedtemp to stabilize
{% endif %}
# Heats up the hotend up to target via slicer
M107 # Turn off partcooling fan
M109 S{target_extruder} # Heat hotend to print temp
# Create a prime line and starts the print
G1 X5 Y4 Z0.4 F10000 # Go to starting point
G1 X115 E20 F1000 # Primeline
2024-09-07: Big update! Removed wall of text, added support for Beacon Contact, PrusaSlicer chamber temperature, fixed typos and more!
2024-05-30: Added support for Orcaslicer.
2022-09-??: Release!
Hungry for more macromania? Make sure to check out these awesome links.
- Mjonuschat optimized bed leveling macros for
- Ellis Useful Macros
- Voron Klipper Macros
- KAMP
- Klipper Shake&Tune plugin
A big thank you to the Voron Communuity for helping make this macro.
If you have feedback please reach out to me on Voron Discord (jontek2) or open an issue on github.