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Prusa i3 MK3 Firmware Modifications

Written By: Dan Rock (and one other contributor)
  • Comments: 29
  • Favorites: 0
  • Completions: 1

Difficulty

Moderate

Steps

20

Time Required

Suggest a time??

Sections

1

Flags

0

Introduction

Please note:

The change in mounting means the calibration wizards will fail, only calibrate the Z height.

    • Because the Prusa i3 MK3 already uses an E3D HotEnd the firmware change for Hemera consists of changing the E steps per mm and entering new nozzle to probe offset values.

    Edit

  2. Edit

  3. Connect the Prusa to your Computer. Connect the Prusa to your Computer.

    • Connect the Prusa to your Computer.

    Edit

  4. Power on.

    • Power on.

    Edit

  5. Navigate to the firmware folder.

    • Navigate to the firmware folder.

    Edit

  6. Navigate to the variants folder Find the file named "1_75_MK3-EINSy10a-E3Dv6full.h"

    • Navigate to the variants folder

    • Find the file named "1_75_MK3-EINSy10a-E3Dv6full.h"

    • Rename it to "Configuration_prusa.h"

    Edit

  7. Copy and paste the file into the previous firmware folder. Copy and paste the file into the previous firmware folder.

    • Copy and paste the file into the previous firmware folder.

    Edit

  9. Double click to open the Firmware.INO file.

    • Double click to open the Firmware.INO file.

    Edit

  10. Click file - preferences. Paste into the Additional Boards Manager URLs field:
    Edit

  11. Select: Tools - Board - Boards Manager. Scroll to the bottom and install "Prusa Research AVR MK3 RAMBo EINSy by Prusa research."

    • Select: Tools - Board - Boards Manager.

    • Scroll to the bottom and install "Prusa Research AVR MK3 RAMBo EINSy by Prusa research."

    Edit

  12. Select Tools - Boards: PrusaResearch EINSY RAMBo

    • Select Tools - Boards: PrusaResearch EINSY RAMBo

    Edit

  13. Find the config.h tab Make sure #define LANG_MODE is set to 0, otherwise the screen will not display correctly when the firmware is flashed.

    • Find the config.h tab

    • Make sure #define LANG_MODE is set to 0, otherwise the screen will not display correctly when the firmware is flashed.

    Edit

  14. Navigate to the Configuration_prusa.h tab. Scroll down to line 429. Change #define X_PROBE_OFFSET_FROM_EXTRUDER 23 to 54

    • Navigate to the Configuration_prusa.h tab.

    • Scroll down to line 429.

    • Change #define X_PROBE_OFFSET_FROM_EXTRUDER 23 to 54

    • Change Y_PROBE_OFFSET_FROM_EXTRUDER 5 to 11

    Edit

  15. Select the COM port that the Prusa is connected to.

    • Select the COM port that the Prusa is connected to.

    • Don't worry if your port number is different than shown, any peripherals connected will show up as a COM port, double check device manager if you are unsure which to connect to.

    Edit

  16. Press upload to flash the firmware.

    • Press upload to flash the firmware.

    Edit

  17. Download and Install Proterface.
    Edit

  18. Check the baudrate is 115200

    • Check the baudrate is 115200

    • Check you have the correct COM port selected. (this will be different from computer to computer)

    • Then click connect

    Edit

  19. Type in M 503 to view the currently stored settings.

    • Type in M 503 to view the currently stored settings.

    • From this you should see the Esteps per mm is 161.30, unless you have calibrated the Esteps seperatly.

    Edit

  20. Send M92 E786.5 to the command line.

    • Send M92 E786.5 to the command line.

    • This should set the E steps to 786.5

    • In order to store that to the EEPROM you need to follow up with a M500 command.

    Edit

    • This e steps value is a starting point, we recommend running an e step calibration in order to fine tune your printers performance.

    Edit
Finish Line

One other person completed this guide.

Author

with 1 other contributor

Dan Rock

Member since: 06/07/2018

21,667 Reputation

40 Guides authored

19 Comments

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This unfortunately dos not work, after flashing random character appears on the screen

Alex - Reply

Hi Alex,

Please see step 12 that’s what this section is for, you need to set the language mode to 1 in order for English characters to be shown

Dan Rock -

Hi Dan, the value should be changed to 0 as per prusa github guide, also in step 19 the command to be send should be M92 E786.5

Alex -

After checking the step 12, I also had the same screen issue… just set language mode to 0 and now everything is working fine!

Ricardo Fernandez - Reply

Thanks for the guide.

Is there a way to modificate the firmware so that the print had does not move from -19 to 0 on the x-axis when the print starts? I would like to have the biggest possible print area.

steffen - Reply

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