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Marlin 2

A chaque fois je prends le master.zip de Marlin + le master.zip de "Marlin configuration" (ils ont fait 2 dépôts séparés). Je copie les exemples de la SKR (car pas d'ender 3 sans la SKR mini ) pour partir d'une version fresh.

Version originale

Fourni avec l'imprimante : Marlin 1.1.6.1

M503 :

Send: M503
Recv: echo:  G21    ; (mm)
Recv: echo:  M149 C ; Units in Celsius
Recv: 
Recv: echo:Filament settings: Disabled
Recv: echo:  M200 D1.75
Recv: echo:  M200 D0
Recv: echo:Steps per unit:
Recv: echo:  M92 X80.00 Y80.00 Z400.00 E93.00
Recv: echo:Maximum feedrates (units/s):
Recv: echo:  M203 X500.00 Y500.00 Z5.00 E25.00
Recv: echo:Maximum Acceleration (units/s2):
Recv: echo:  M201 X500 Y500 Z100 E5000
Recv: echo:Acceleration (units/s2): P<print_accel> R<retract_accel> T<travel_accel>
Recv: echo:  M204 P500.00 R500.00 T500.00
Recv: echo:Advanced: Q<min_segment_time_us> S<min_feedrate> T<min_travel_feedrate> X<max_x_jerk> Y<max_y_jerk> Z<max_z_jerk> E<max_e_jerk>
Recv: echo:  M205 Q20000 S0.00 T0.00 X10.00 Y10.00 Z0.30 E5.00
Recv: echo:Home offset:
Recv: echo:  M206 X0.00 Y0.00 Z0.00
Recv: echo:Material heatup parameters:
Recv: echo:  M145 S0 H185 B45 F255
Recv: echo:  M145 S1 H240 B0 F255
Recv: echo:PID settings:
Recv: echo:  M301 P21.73 I1.54 D76.55
Recv: ok

Modifs

Compilation

Post reddit pour modif Marlin pour SKR

Qui a vraiment plein d'infos

https://www.reddit.com/r/ender3/comments/e894j7/marlin_20x_guide_for_ender_3_using_skr_mini_e3_v12/

Changes to the original Marlin 2.0.5.3 files for Ender 3 with SKR mini E3 v1.2.

^(Use this guide with other marlin versions at your own risk.)

Content:

  1. Getting started
  2. Essential changes
  3. PID autotune
  4. BLTOUCH
  5. Measure NOZZLE_TO_PROBE_OFFSET
  6. BLTouch wiring
  7. Unified Bed Leveling (UBL)
  8. Manual Mesh Bed Leveling
  9. Filament Runout Detection and Filament Change
  10. Linear Advance
  11. Junction Deviation
  12. All in one Retraction testing
  13. 512k flash memory
  14. Compiling firmware
  15. Flashing firmware
  16. Updating/Reflashing firmware
  17. Printable Direct Drive mod
  18. Changelog

Getting started

  1. Install VSCode and Git according to this Installation guide
  2. Open Marlin in VSCode as it is in this Comment
    1. (You can choose the marlin version at the bottom left corner of the window, the default is the latest 2.0.x)
  3. Modify your Marlin based on this guide
    1. (Not necessary step) Optionally you can use the marlin example file for this board for easier/faster editing. The example file for this board is in the zip file, under config\examples\BigTreeTech\SKR Mini E3 1.2.

E - Enable | C - Change | E&C - Enable and Change | D - Disable

Enable/Disable by deleting/placing // at the start of a line.

Essential changes

Essential / useful changes to platformio.ini, Configuration.h and Configuration_adv.h files in Marlin/ folder.

platformio.ini:

  • C default_envs = STM32F103RC_btt_512K

Configuration.h:

  • E SHOW_CUSTOM_BOOTSCREEN
  • E CUSTOM_STATUS_SCREEN_IMAGE
    • (Copy _Bootscreen.h / _Statusscreen.h file from Marlin\config\examples\Creality\Ender-3\ to Marlin\Marlin folder)
    • Download it from the Marlin GitHub.
  • C SERIAL_PORT 2
  • E SERIAL_PORT_2 -1
  • C BAUDRATE 115200
    • (BTT default baudrate)
  • C MOTHERBOARD BOARD_BTT_SKR_MINI_E3_V1_2
  • E&C CUSTOM_MACHINE_NAME "Ender-3"
  • C DEFAULT_NOMINAL_FILAMENT_DIA 1.75
  • C TEMP_SENSOR_BED 1
  • C BED_MAXTEMP 125
    • (By setting it to 70 for a magnetic bed that works up to 70 °C, marlin will only let it heat up to 60, for safety reason)
  • E PIDTEMPBED
    • (You don't need to enable PIDTEMPBED, if you are satisfied with your heated bed, but by calibrating the heated bed, it could heat up faster and maintain temperature more accurately)
    • (Be sure to do a PID autotune for your heated bed after you enabled it in your firmware, otherwise it will trigger Thermal Runaway Protection when heating up the bed. You can find the guide under the PID autotune section, later in this post)
  • C EXTRUDE_MAXLENGTH 200
    • (Or measure the length from the extruder gear to the nozzle through the PTFE tube)
  • C Z_MIN_PROBE_ENDSTOP_INVERTING true
    • (BLTouch v3/3.1 can work with either true/false, but v2 needs it to be true)
  • E&C X_DRIVER_TYPE TMC2209
  • E&C Y_DRIVER_TYPE TMC2209
  • E&C Z_DRIVER_TYPE TMC2209
  • E&C E0_DRIVER_TYPE TMC2209
  • C DEFAULT_AXIS_STEPS_PER_UNIT { 80, 80, 400, 93 }
  • C DEFAULT_MAX_FEEDRATE { 500, 500, 20, 60 }
  • C DEFAULT_ACCELERATION 500
  • C DEFAULT_RETRACT_ACCELERATION 500
  • C DEFAULT_TRAVEL_ACCELERATION 500
  • E CLASSIC_JERK
  • E&C TRAVEL_EXTRA_XYJERK 5.0
  • C DEFAULT_EJERK 15.0
  • E S_CURVE_ACCELERATION
  • C INVERT_X_DIR true
  • C INVERT_E0_DIR true
  • C X_BED_SIZE 235
  • C Y_BED_SIZE 235
  • C Z_MAX_POS 250
  • E LEVEL_BED_CORNERS
  • C LEVEL_CORNERS_HEIGHT 0.1
    • (Set it to the thickness of the paper/credit card/feeler gauge you want to use)
  • C HOMING_FEEDRATE_XY (50*60)
  • E EEPROM_SETTINGS
  • E NOZZLE_PARK_FEATURE
  • C NOZZLE_PARK_POINT { (X_MIN_POS + 10), (Y_MAX_POS - 10), 20 }
  • D DISPLAY_CHARSET_HD44780
  • E SDSUPPORT
  • E CR10_STOCKDISPLAY
  • E FAN_SOFT_PWM

Configuration_adv.h:

  • E QUICK_HOME
  • C SLOWDOWN_DIVISOR 8
  • E ADAPTIVE_STEP_SMOOTHING
  • E STATUS_MESSAGE_SCROLLING
  • E PRINT_PROGRESS_SHOW_DECIMALS
  • E SHOW_REMAINING_TIME
  • E USE_M73_REMAINING_TIME
  • E ROTATE_PROGRESS_DISPLAY
  • E SCROLL_LONG_FILENAMES
  • E&C SDCARD_CONNECTION ONBOARD
  • E STATUS_HEAT_PERCENT
  • E LIN_ADVANCE
  • C LIN_ADVANCE_K 0.00
    • (You can find guide links to calibrate your K value under the Linear Advance section, later in this post)
  • C BLOCK_BUFFER_SIZE 32
  • C BLOCK_BUFFER_SIZE 32
  • C BUFSIZE 32
  • C TX_BUFFER_SIZE 32
  • C X_CURRENT 580
  • C Y_CURRENT 580
  • C Z_CURRENT 580
  • C E0_CURRENT 650
  • C CHOPPER_TIMING CHOPPER_DEFAULT_24V
  • E MONITOR_DRIVER_STATUS
  • D HYBRID_THRESHOLD
  • E CANCEL_OBJECTS

PID autotune

(You don't need to enable PIDTEMPBED if you are satisfied with your heated bed, but by calibrating the heated bed, it can heat up faster and can maintain temperature more accurately)

  1. Connect the printer to the PC (USB, Octoprint, etc.)
  2. Use any software that can send gcode commands to a printer (Octoprint, Pronterface, Repetier, Simplify3D, etc.)
  3. Connect to the printer in the software if not done automatically (COM4, 115200)
  4. By sending an M301/M304 to the printer you will the PID values for the HOTEND / HEATED BED, take a note of those values
  5. To start an autotune, you will need to send an M303 C < count > E < index > S < temp > U to the printer.
    1. For the hotend I used M303 C25 E0 S205 U (Hotend: E0)
      1. (Turn on the part cooling fan for the hotend PID autotuning)
      2. ( C5 should be enough, but C25 doesn't take too long either, S < temp > should be the 5-10 more than the printing temperature you usually use)
    2. For the heated bed I used M303 C25 E-1 S60 U (Heated bed: E-1)
      1. ( C5 should be enough, but if I did 25 for the hotend might as well do it to the bed too, S < temp > should be the bed temperature you usually use) (If after the M303 ... you get "PID Autotune failed! Temperature too high", send an M304 P0.00 I0.00 D0.00 to the printer, then redo the PID autotune)
  6. Wait for the operation to complete (when it's done the heating cycle will stop and the temperature will drop)
  7. Take a not of the new P, I, D values that the software displays
  8. Send an M500 to the printer to save the the new PID values to the EEPROM
  9. To make sure that all the values are saved, send an M301 / M304 to the printer to display the current PID values
  10. If the current PID values doesn't match the new values, then you need to set the PID values manually:
  11. Hotend: Send an M301 P< value > I < value > D< value > to the printer
  12. Heated bed: Send an M304 P< value > I < value > D< value > to the printer
  13. Send an M500 to the printer to save the the new PID values to the EEPROM
  14. In Configuration.h update the PID values for future firmware updates (DEFAULT_Kp, ...Ki, ...Kd, DEFAULT_bedKp, ...bedKi, ...bedKd)

&#x200B;

BLTOUCH

Configuration.h:

  • E BLTOUCH
  • C NOZZLE_TO_PROBE_OFFSET { -44.5, -10, -1.00 }
    • (Edit these values according to your setup, help is in the Measure NOZZLE_TO_PROBE_OFFSET section)
  • C MIN_PROBE_EDGE 10
    • (If you have clips holding the bed, increase it to your clip size +5)
  • C XY_PROBE_SPEED 6000
    • (With 6000 the BLTouch works more reliably)
  • E Z_MIN_PROBE_REPEATABILITY_TEST
  • E AUTO_BED_LEVELING_BILINEAR
    • (or use AUTO_BED_LEVELING_UBL / MESH_BED_LEVELING, guide links later in this post)
  • E RESTORE_LEVELING_AFTER_G28
  • E Z_SAFE_HOMING

Configuration_adv.h:

  • E BLTOUCH_DELAY 500
    • (If you are experiencing failed probing, then increasing it could help)
  • D BLTOUCH_SET_5V_MODE
  • E BABYSTEPPING
  • C BABYSTEP_MULTIPLICATOR_Z 4
    • (1 will raise the Z-axis by 1 microstep (0.0025), 4 will raise the Z-axis by 0.01)
  • E DOUBLECLICK_FOR_Z_BABYSTEPPING
    • (Double-click on the Status Screen to edit Z Babystepping during prints)
  • E BABYSTEP_ZPROBE_OFFSET
  • E BABYSTEP_ZPROBE_GFX_OVERLAY

Measure NOZZLE_TO_PROBE_OFFSET

  1. Take rough measurements from the probe pin to the nozzle in X and Y directions
    1. (The tip of the probe pin should be 2.3-4.3mm higher than the nozzle)
  2. Change the NOZZLE_TO_PROBE_OFFSET values according to your measurements
  3. Compile - flash - boot ...
  4. Home the printer
  5. Take a note of the X and Y coordinates (you can do that in the printer move axis menu)
  6. Move the Z axis down until the nozzle touches or almost touches the print bed
  7. Mark that point where the nozzle touches the bed (make sure that your mark won't move on the bed)
  8. Move the X and Y axis in the printer menu until the probe pin is spot on to your mark
  9. Take a note of the X and Y coordinates
  10. Subtract the X/Y coordinates from the original X/Y coordinates to get the NOZZLE_TO_PROBE_OFFSET

BLTouch wiring

  • Teaching Tech Guide for SKR mini E3 v1.2 + BLTouch
  • Chris Riley BLtouch Bed Leveling Sensor
  • Wiring diagram from GitHub
    • SERVOS
      • Brown or Blue - GND
      • Red - +5V
      • Yellow - PA1
    • Z-STOP
      • Black - GND
      • White - PC2

Unified Bed Leveling (UBL)

Manual Mesh Bed Leveling

Configuration.h

  • E PROBE_MANUALLY
  • C NOZZLE_TO_PROBE_OFFSET { 0, 0, 0 }
  • E MESH_BED_LEVELING
  • E RESTORE_LEVELING_AFTER_G28
  • C GRID_MAX_POINTS_X 5 (Or change it accordingly to your needs)
  • E LCD_BED_LEVELING

Leveling:

Heat up your bed to the temperature you usually print on (e.g. 60°C) (Make sure that there are no plastic on the nozzle, that would alter the nozzles distance to the bed)

  1. Select: Prepare - Bed Leveling - Level Bed
  2. Wait for Homing XYZ to complete
  3. When Click to Begin appears, press the controller button to move to the first point
  4. Use the controller wheel to adjust Z so that a piece of paper can just pass under the nozzle
  5. Press the controller button to save the Z value and move to the next point
  6. Repeat steps 4-5 until completed
  7. Select: Configuration - Store settings to save the mesh to the EEPROM
  8. Select: Motion - Fade height: Set it to 10
  9. Select: Motion - Store settings
  10. Make a test print, and as it prints you can change the nozzle distance to the bed in Motion - Bed Z with the controller wheel
  11. Select: Configuration - Store settings

&#x200B;

Filament Runout Detection and Filament Change

pins_BTT_SKR_MINI_E3.h (Found it in Marlin\Marlin\src\pins\stm32f1)

  • D Z_MIN_PROBE_PIN

Switch with 2 pin connector:

  • C FIL_RUNOUT_PIN PC14 // "PROBE"

Configuration.h

  • E FILAMENT_RUNOUT_SENSOR
  • E&C FILAMENT_RUNOUT_DISTANCE_MM 5

(Filament Runout detection and M600 - Filament Change part)

  • C EXTRUDE_MAXLENGTH 100
    • (Length from the extruder gear to the nozzle + 10)
  • E NOZZLE_PARK_FEATURE
  • C NOZZLE_PARK_Z_FEEDRATE 3

Configuration_adv.h

  • E ADVANCED_PAUSE_FEATURE
  • C PAUSE_PARK_RETRACT_FEEDRATE 30
    • (Change it to your retraction speed)
  • C PAUSE_PARK_RETRACT_LENGTH 6
    • (Change it to your retraction length)
  • C FILAMENT_CHANGE_UNLOAD_LENGTH 100
    • (Length from the extruder gear to the nozzle OR set it to 0 for manual filament extraction)
    • (This needs to be less than or equal to EXTRUDE_MAXLENGTH)
  • C FILAMENT_CHANGE_FAST_LOAD_LENGTH 0
    • (Length from the extruder gear to the nozzle OR set it to 0 for manual filament insertion)
    • (This needs to be less than or equal to EXTRUDE_MAXLENGTH)
  • C FILAMENT_CHANGE_ALERT_BEEPS 10
    • (10 might be too much/annoying, if so, lower it to your liking)
  • E PARK_HEAD_ON_PAUSE
  • E HOME_BEFORE_FILAMENT_CHANGE
  • E FILAMENT_LOAD_UNLOAD_GCODES
    • (Adds M701/M702 Load/Unload G-code, and Load/Unload in the LCD Prepare menu.)

Connect your Runout switch with 2 pin connector to the "PROBE" (PC14) and with 3 pin connector to the "PT-DET" connector on either side of the "SERVOS" (BLTouch) connector. (I use the Z-endstop switch with 2 pin connector for runout sensor)

Teaching Tech

Chris Riley

Linear Advance

Junction Deviation

All in one Retraction testing

512k flash memory

Compiling firmware

Use VSCode with the PlatformIO extension and Git GUI.

You can find the firmware file in Marlin/.pio/build/STM32F103RC_btt_512K/firmware.bin

Flashing firmware

Place the firmware.bin file onto your SD card, them insert it into your printer and turn it on. After a short 20-30 sec blank screen your printer should be ready.

If after ~50-60 sec there is still a blank screen, don't worry, just turn off your printer. A long blank screen could mean that the firmware you just tried is bad in some way. You should recheck your configurations, then try reflashing it. Comment.

Updating/Reflashing firmware

(Comment) You don't need to redo all the changes every time you want to update to a newer version of marlin, just copy your edited files to the new marlin and compare them in VSC Source Control (Ctrl+Shift+G), and copy anything that is new or changed.

Not all changes will be applied on a firmware update. For that you will need to reset your printer settings by Restore Defaults (M502) in menu - Configuration, then Save Settings (M500). It will reset your settings back to your edited firmware values.

Printable Direct Drive mod

Printable Direct Drive extruder mount for Ender 3, Ender 5, CR-10 etc.

Changelog:

^(Changes older than 1 month are deleted.)

  • 04.22.
    • Added Linear Advance and S-Curve Acceleration conflict cautionary.
  • 04.26.
    • pins_BTT_SKR_MINI_E3.h location changed form ...\stm32 to ...\stm32f1
    • If you get EEPROM error on startup, go in the printer to the Configuration, press Restore Defaults then Store Settings
  • 05.13.
    • Removed #define
  • 05.14.
    • Disabled Hybrid Threshold and settings related to it, to the way it will be in 2.0.6
    • Added DEFAULT_EJERK, HOME_BEFORE_FILAMENT_CHANGE
  • 05.19.
    • Removed the PT-DET option for filament runout sensor, as it cannot be used for filament runout sensor.

Feedbacks are always welcome."

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