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Ender 5 and Ender 5 Pro BL Touch Installation and Firmware Upgrade  

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Print3D
(@Print3D)
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Joined: 1 year ago
Posts: 31
02/08/2020 9:37 pm  

We have uploaded a modified firmware for Ender 5 & Ender 5 Pro which is the latest version of Marlin 1.1.9 from the marlin website, and modified the configuration for Ender 5 printers as well as BLTouch options enabled. The kit used to configure this around was the Creality BLTouch kit and mount that was supplied within it.

Download the modified firmware folder here: https://print3d.world/bfd_download/ender-5-ender-5-pro-marlin-1-1-9-with-official-creality-bltouch/

Requirements

Note about the bed leveling strategy

There are two ways to perform the automatic bed leveling, the first is before every print and the second is only when necessary. Based on my experience with the Ender 3, it's better to do an extremely precise (slower) bed leveling when necessary than a simpler one before every print. This firmware configuration reflects this choice.

If you want to do quick/imprecise bed leveling before every print you will need to reconfigure the firmware.

  1. Download and install Visual Studio Code.
  2. From Visual Studio Code extension menu, install the PlatformIO IDE extension.
  3. With all requirements running, unpack the entire Marlin source code downloaded from the link below to a folder.
  4. From Visual Studio Code select File->Open folder and select the folder where the platformio.ini file is located. Attention! Use the "open folder" command, not the"open file".
  5. Look for the configuration.h inside the "Marlin" sub-folder and edit the following configuration to the relative coordinates of your BLTouch mount to the Nozzle. This does not need to be too precise, the only purpose is avoiding the probe to test outside the bed. The default settings X = -42mm, Y= -5mm and Z=0 are for this mount:
    #define NOZZLE_TO_PROBE_OFFSET { 0, -22, -2.35 }   (Found from Creality config here: https://docs.wixstatic.com/ugd/f5a1c8_77037f55e5d542309d9fc178165c9f3f.pdf) 

    This offset may need to be measured manually with a caliper, only use this as a starting point.

  6. Save the file and then select Terminal->Run Task->Build . It will take a few minutes for the system to download all dependencies and compile the code.
  7. If the code compiled properly you will see something like this in the terminal: "=== 1 succeeded in 00:00:30.050 ===".
  8. Connect your printer to the computer using the USB cable.
  9. Go to the Visual Code menu Terminal->Run Task->Upload .
  10. If everything goes well another message like this "=== 1 succeeded in 00:00:55.010 ===" will be printed.

 

Post Installation Setup

  1. Manually pre-level the bed! This is important because the BLTouch has limited max/min detection ranges and the print quality can be affected if the Z-Axis moves too much.
     
    1. Cool down the bed and the nozzle. Heating should have little to no effect on this specific procedure.
    2. Disable stepper motors using the LCD menu command.
    3. Place a credit card on one the bed, the thickness of the card will be used as a reference distance.
    4. Turn the Z axis with your hand until the nozzle hits the credit card.
    5. Move hot end to several positions of the bed, starting from the 4 corners. For each position, adjust the bed level knobs to keep the nozzle at the credit card thickness distance from the nozzle. This is what you would do in manual calibration but instead of using a paper you will use the card for convenience. The card thickness does not matter because the BLTouch probe will redefine the Z reference.
       
  2. Heat the bed to the printing temperature and run the bed level command from the LCD (Prepare -> Bed Leveling -> Level bed)  or using the G29 gcode or using the Heat and Level command from the custom menu (recommended). Note that the Heat and Level command waits 2 minutes after the bed is hot to allow the mounted surfaces to expand/contract properly.
  3. Save the settings using the LCD menu or the M500 gcode (if you used the Heat and Level custom command, they will be automatically saved).
  4. Add the following gcode to the startup code of you slicer, right after the line of the G28 command to load the bed level configuration from the memory before every print:
    M420 S1

     

  5. After enabling the bed level, print something large and flat to adjust the Z offset. The nozzle will always be far from the bed until you adjust the offset to a negative value (LCD -> Prepare -> Bed Leveling -> Z Offset). Don't forget to save the settings after the print to keep the offset in the memory, you can use the LCD or the M500 GCode for this.

Troubleshooting tips

  • Bed level failing:
    • 1st - make sure you manually leveled the bed, the probing tends to fail if any part of the bed is >2mm lower or higher than the home level.
    • 2nd - make sure you have the M420 S1 command AFTER the G28 line in your print initialization GCode.
    • 3rd - make sure your probe was installed properly, there are maximum and minimum height clearences between the BLTouch tip and the nozzle tip and that changes for each version of BLTouch.
    • 4th - check the wiring! Sometimes the wires are inverted in the default connector setup.
    • 5th - if you are using BLTouch 3.x see the next topic.
  • BLTouch 3.x failing to probe: Be aware that this is rare contition, the vast majority of the users run BLTouch 3.x without problems. I suspect this is related with the hardware (probe/board components, etc) and there is little we can do from the firmware side:
    • 1st - Enable the 5V logic in the LCD menu (LCD -> Control-> BLTouch). BLTouch versions 1.x and 2.x don't have voltage modulation do not require this setting.
    • 2nd - If the previous does not work, enable SW mode (LCD -> Control-> BLTouch).
    • 3rd - Enable and adjust the delay setting in configuration_adv.h (requires recompiling the source). This is trial an error but try values from 300 to 700 increasing/decreasing by 100.
    • 4th - If the BLTouch is version 3.0 (not 3.1, 3.x...) enable BLTOUCH_FORCE_MODE_SET setting in the configuration_adv.h.
    • 5th - If none of the above work you either have a faulty probe or a problem with the capacitor in the board.
#define BLTOUCH_DELAY 500
  • Error "..._PIN is not interrupt-capable..." in Arduino IDE: This is an Arduino IDE bug, disable the feature in the configuration.h file according to the example below to fix (put "//"). If you are using PlaformIO you should leave this option enabled.
//#define ENDSTOP_INTERRUPTS_FEATURE
  • Disable serial port clients before flashing: If the COM ports are used by any other app, the flashing process will fail. Shutdown Cura, OctoPrint, any other slicer and any other Serial Monitor program like the Arduino IDE before compiling/flahsing the new ROM.
  • Correct fuse settings: If you are using other software than AVRDUDE (PROGISP, for example) to upload the firmware make sure you are using the correct fuse settings. Apparently the Creality tutorial has the wrong settings and the board fails to boot afterwards.
  • Reset the EEPROM: Sometimes the EEPROM memory is not reset during the Marlin reflash and this can cause problems. To reset manually use the following G-Codes from any Serial Terminal: M502 followed by M500.
  • Blank screen after flashing: You did not flashed the firmware properly. Please use AVRDude according to the instructions above and if this does not work you might have to reflash the bootloader.
  • Serial Port Monitor for Windows: This small program allows you to send/receive GCode to the printer. If the characters look strange you are probably using the wrong baud rate (start with 115200bps).
  • avrdude: stk500_getsync() attempt 1 of 10: not in sync: Wrong baud rate for the serial port or serial port already in use (OctoPrint, Cura, etc..). Try configuring the upload rate to 115200bps. If you are using PlatformIO to upload, make sure you are using the correct baud rate for your environment in the platformio.ini file.

Reconfigure the BLTouch probe offsets: Use the following command replacing the -42, -5 and 0mm coordinates with the offsets of your actual mount:

M851 X-42 Y-5 Z0
M500



Thanks to https://www.danbp.org/p/en/node/136 for some of these instructions! We modified the firmware, and used his instructions.
This topic was modified 2 months ago by Print3D

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