Does anyone know if there is a Klipper printer.cfg profile out there for the LR2? I recently built a Voron and Klipper+Mainsail has made me fall back in love with 3D printing all over again. So easy to tweak and control my machines now compared to Marlin. A LR2+Klipper+Mainsail combo would be absolutely incredible.
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After building my voron(s) I’ve also become a big fan of klipper. I’m in the process of building my LR3 and plan to run klipper on my SKR 1.3 and a RPi 3B+. Since this will be my first CNC I still need to learn the gcode structures, but I think anything “missing” from the klipper base can be replaced with macro functions.
I’m planning on using pin aliases so the controllers are easily interchangeable by just updating an include line. I’m glad to see that there is more interest in klipper for this project. 
A generic Cartesian profile might all that is needed to get a start. Once the PI’s become available at a reasonable price I may try my luck with making a profile. I know you can use any Linux device to install Klipper but briefly looking over the instructions on how to do it I’d rather not. I’m not familiar enough with Linux to troubleshoot if something goes wrong during installation.
A lot of the sites have email lists and I have had good luck getting those when I get the email. They often also have a limit one per customer.
BTT came out with a klipper centric controller recently that looks interesting. It uses either the “sometimes more available” CM4 Pi module or their CB1 clone. There are already folks with writeups on how to linux, klippy, moonraker, and fluidd/mainsail installed on the CB1.
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I have my LR3 moving with cartesian kinematics defined, but still need to build my table to test the Y axis movement. In the marlin config, there dose seem to be some CNC specific features that enable different gcodes. I need to read more about it to see if I can adapt it to klipper macros. If you would like my printer.cfg and supporting includes, feel free to PM me.
I’ve used KIAUH on all of my klipper based machines. It’s an awesome wrapper script the installs all the needed components and their requirements, no OS images needed.
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I’ve tried that and got a bad 3b+ from Adafruit. Had a bunk wifi chip. Probably a rare occurrence but still. There is also rpilocator to help find them too.
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Interesting. Does the BTT + CM4/CB1 have wifi capabilities built in? Haven’t looked into the CM4. If so that might be the direction I go.
Based on the CM4 spec, it does. I would assume that the CB1 being a bit of a clone should also have wifi as well.
Oh wow. Adafruit is usually extra expensive and reliable. I put them in the same league as sparkfun/digikey, mouser, mcmaster carr… Good enough to order from work! Not like the alibaba/aliexpress, banggood, ebay, which are only good enough for home.
Yeah I thought it was strange too given their reputation. Stuff happens. May have been something in the description about being used and/or refurbished that I may have missed since I was frantically trying to setup their 2-factor authentication before they sold out! That batch sold out in 2 minutes.
Does anyone know if there is a Klipper printer.cfg profile out there for the LR2?
For what its worth, here’s the klipper printer.cfg I work with for the lr3. The klipper SET_SKEW function is invoked following home of the axis, which enables precise squaring of the work area.
The spindle is switched on/off with a relay so the TOOL_ON/OFF macros can be embedded in the gcode. The emergency stop procedure also switches off the spindle a split second before it slams onto the table.
[include mainsail.cfg]
# This file contains common pin mappings for MKS Robin Nano V3
# boards. To use this config, the firmware should be compiled for the
# stm32f407. When running "make menuconfig", select the 48KiB
# bootloader, and enable "USB for communication".
# The "make flash" command does not work on the MKS Robin. Instead,
# after running "make", copy the generated "out/klipper.bin" file to a
# file named "Robin_nano_v3.bin" on an SD card and then restart the
# MKS Robin with that SD card.
# See docs/Config_Reference.md for a description of parameters.
[stepper_x]
step_pin: PE3
dir_pin: PE2
enable_pin: !PE4
microsteps: 64
rotation_distance: 32
endstop_pin: PA15
position_endstop: 0
position_min: 0
position_max: 1660
homing_speed: 50
[tmc2209 stepper_x]
uart_pin: PD5
run_current: 0.95
[stepper_y]
step_pin: PE0
dir_pin: !PB9
enable_pin: !PE1
microsteps: 64
rotation_distance: 32
endstop_pin: PD2
position_endstop: 0
position_min: -2
position_max: 2743
homing_speed: 50
[tmc2209 stepper_y]
uart_pin: PD7
run_current: 0.95
[stepper_z]
step_pin: PB5
dir_pin: PB4
enable_pin: !PB8
microsteps: 64
rotation_distance: 8
endstop_pin: PC8
position_min:-5
position_max: 76
position_endstop: 70
homing_positive_dir: true
[tmc2209 stepper_z]
uart_pin: PD4
run_current: 0.95
[stepper_z1]
step_pin: PD6
dir_pin: PD3
enable_pin: !PB3
microsteps: 64
rotation_distance: 8
endstop_pin: PC4
[tmc2209 stepper_z1]
uart_pin: PD9
run_current: 0.95
[stepper_y1]
step_pin: PD15
dir_pin: PA1
enable_pin: !PA3
microsteps: 64
rotation_distance: 32
endstop_pin: PA13
[tmc2209 stepper_y1]
uart_pin: PD8
run_current: 0.95
[output_pin tool_power]
# tool_power pin PA4 is located at J52, the 6th jumper down in the endstop block
pin: PA4
value: 0
shutdown_value: 0
pwm: false
[output_pin tool_power_led]
# tool_power led pin PC14 is located at fan1 led
pin: PC14
[mcu]
serial: /dev/serial/by-id/usb-Klipper_stm32f407xx_12345-if00
[printer]
kinematics: cartesian
max_velocity: 200
max_accel: 250
max_accel_to_decel: 125
max_z_velocity: 25
max_z_accel: 50
square_corner_velocity: 1
[gcode_arcs]
resolution: 0.05
[pause_resume]
recover_velocity: 50.
[skew_correction]
[display_status]
[board_pins]
aliases:
# EXP1 header
EXP1_1=PC5, EXP1_3=PD13, EXP1_5=PE14, EXP1_7=PD11, EXP1_9=<GND>,
EXP1_2=PE13, EXP1_4=PC6, EXP1_6=PE15, EXP1_8=PD10, EXP1_10=<5V>,
# EXP2 header
EXP2_1=PA6, EXP2_3=PE8, EXP2_5=PE11, EXP2_7=PE12, EXP2_9=<GND>,
EXP2_2=PA5, EXP2_4=PE10, EXP2_6=PA7, EXP2_8=<RST>, EXP2_10=<3.3v>
# Pins EXP2_1, EXP2_6, EXP2_2 are also MISO, MOSI, SCK of bus "ssp1"
# See the MKS Lcd Config path file for definitions of common LCD displays.
#--------------------------------
# MACROS
[gcode_macro SET_TOOLHEAD_OFFSET]
gcode:
{% set xo = printer.toolhead.position.x|float %}
{% set yo = printer.toolhead.position.y|float %}
{% set zo = printer.toolhead.position.z|float %}
SET_GCODE_OFFSET x={xo} y={yo} z={zo}
[gcode_macro CLEAR_TOOLHEAD_OFFSET]
gcode:
SET_GCODE_OFFSET x=0 y=0 z=0
[gcode_macro TOOL_ON]
gcode:
SET_PIN PIN=tool_power VALUE=1
SET_PIN PIN=tool_power_led VALUE=1
[gcode_macro TOOL_OFF]
gcode:
SET_PIN PIN=tool_power VALUE=0
SET_PIN PIN=tool_power_led VALUE=0
[gcode_macro HOME_ALL]
gcode:
G28 Z
G28 XY
SET_SKEW XY=1701.8,1700.6875,1200
[gcode_macro PARK_TOOL]
gcode:
{action_respond_info("*** REMINDER: switch off spindle manually ***")}
TOOL_OFF
CLEAR_TOOLHEAD_OFFSET
G0 Z65
G0 X40 Y50
G1 Z25
[gcode_macro FW_RESTART]
gcode:
FIRMWARE_RESTART
[gcode_macro WORKSPACE_1]
# Configured for 25.4mm stock height, 9mm spoilboard height, 6in stock width
gcode:
SET_GCODE_OFFSET x=0 y=0 z=0
g0 z68
g0 x322 y315
g0 z64.4
SET_GCODE_OFFSET x=322 y=315 z=39
[gcode_macro TOOLCHANGE]
gcode:
g0 z36
g0 x-40 y-40
[gcode_macro TOOL_Z0]
gcode:
g0 z36
g0 x-40 y10
g0 z0
I also needed to edit mainsail.cfg to remove checks for hotend thermistor temperature within range before starting print job:
# Mainsail klipper definitions
#
# Copyright (C) 2021 Alex Zellner <alexander.zellner@googlemail.com>
#
# This file may be distributed under the terms of the GNU GPLv3 license
#
# Version 1.11
# add [include mainsail.cfg] to your printer.cfg to include it to your printer.cfg
# modify x_park, y_park, z_park_delta and extrude value at the macro _TOOLHEAD_PARK_PAUSE_CANCEL if needed
# use variable_park: False at CANCEL_PRINT to disallow the parking move
[virtual_sdcard]
path: /var/print
#on_error_gcode: CANCEL_PRINT
[pause_resume]
[display_status]
[gcode_macro CANCEL_PRINT]
description: Cancel the actual running print
rename_existing: CANCEL_PRINT_BASE
variable_park: True
gcode:
{action_respond_info("CANCEL_PRINT")}
## Move head and retract only if not already in the pause state and park set to true
{% if printer.pause_resume.is_paused|lower == 'false' and park|lower == 'true'%}
_TOOLHEAD_PARK_PAUSE_CANCEL
{% endif %}
#TURN_OFF_HEATERS
M106 S0
{action_respond_info("Calling cancel print base")}
CANCEL_PRINT_BASE
[gcode_macro PAUSE]
description: Pause the actual running print
rename_existing: PAUSE_BASE
gcode:
PAUSE_BASE
_TOOLHEAD_PARK_PAUSE_CANCEL
[gcode_macro RESUME]
description: Resume the actual running print
rename_existing: RESUME_BASE
gcode:
##### read extrude from _TOOLHEAD_PARK_PAUSE_CANCEL macro #####
#{% set extrude = printer['gcode_macro _TOOLHEAD_PARK_PAUSE_CANCEL'].extrude %}
#### get VELOCITY parameter if specified ####
{% if 'VELOCITY' in params|upper %}
{% set get_params = ('VELOCITY=' + params.VELOCITY) %}
{%else %}
{% set get_params = "" %}
{% endif %}
##### end of definitions #####
#{% if printer.extruder.can_extrude|lower == 'true' %}
# M83
# G1 E{extrude} F2100
# {% if printer.gcode_move.absolute_extrude |lower == 'true' %} M82 {% endif %}
#{% else %}
# {action_respond_info("Extruder not hot enough")}
#{% endif %}
RESUME_BASE {get_params}
[gcode_macro END_PRINT]
#rename_existing: END_PRINT_BASE
gcode:
{action_respond_info("END_PRINT")}
_TOOLHEAD_PARK_PAUSE_CANCEL
#Disable Steppers
M84 X Y
[gcode_macro _TOOLHEAD_PARK_PAUSE_CANCEL]
description: Helper: park toolhead used in PAUSE and CANCEL_PRINT
variable_extrude: 1.0
gcode:
{action_respond_info("_TOOLHEAD_PARK_PAUSE_CANCEL")}
##### set park positon for x and y #####
# default is your max posion from your printer.cfg
{% set x_park = printer.toolhead.axis_minimum.x|float + 5.0 %}
{% set y_park = printer.toolhead.axis_minimum.y|float + 5.0 %}
{% set z_park_delta = 2.0 %}
##### calculate save lift position #####
{% set max_z = printer.toolhead.axis_maximum.z|float %}
{% set z_safe = max_z - z_park_delta %}
#{% set act_z = printer.toolhead.position.z|float %}
#{% if act_z < (max_z - z_park_delta) %}
# {% set z_safe = z_park_delta %}
#{% else %}
# {% set z_safe = max_z - act_z %}
#{% endif %}
##### end of definitions #####
#{% if printer.extruder.can_extrude|lower == 'true' %}
# M83
# G1 E-{extrude} F2100
# {% if printer.gcode_move.absolute_extrude |lower == 'true' %} M82 {% endif %}
#{% else %}
# {action_respond_info("Extruder not hot enough")}
#{% endif %}
{% if "xyz" in printer.toolhead.homed_axes %}
{% set x_park = 101.0 %}
{% set y_park = 102.0 %}
{% set z_safe = 66.0 %}
{action_respond_info("Moving axis to safe positions")}
G90
G1 Z{z_safe} F900
G1 X{x_park} Y{y_park} F6000
{% if printer.gcode_move.absolute_coordinates|lower == 'false' %} G91 {% endif %}
{% else %}
{action_respond_info("Printer not homed")}
{% endif %}
{action_respond_info("_TOOLHEAD_PARK_PAUSE_CANCEL end")}
Pics, with examples of architectural parts made with the lr3:
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That is awesome! I like the din rail. Thanks for the reference config.
Nice! This is very helpful. I see [skew_correction] in your printer.cfg. Did you use that with your LR3? My LR2 has the slightest skew, just enough to bother me, and it’d be great to use the skew correct feature to squash it. Work great on printers.
Yes, I use the skew correction feature with the lr3 and it works great.
Thanks for the config. I am in the process of learning klipper on my ender3 before adding it to my X5SA Pro. I am running it on a laptop since the PI’s are crazy priced. It should be a natural extension to the LR3
Thanks for the config.
it was insanely useful for me, I’m even a little shocked