Decided to fork TheUnlimited64's linear advance mod to test it out and reduce the driver current while I'm at it. 800 mA get my motor really hot and 600 mA is the stock setting. I set the current 75 mA above stock as a compromise (eyeballed really).
I also added a tool to aid with changing the splash image shown on boot.
Usage:
- grab a 320x240 .png image
- grab the tool executable (indexed-image-array/indexed-image-array.exe in this repo)
-
- alternatively, set up Rust and build from source if you wish to modify it or run it on linux for example
- put them in the same folder
- open terminal in said folder
- execute the tool (pipe the output to a file if copying from the terminal is inconvenient:
indexed-image-array.exe > output.txt) -
- you now have the palette and the indices of the splash screen
- open \source\board\bsp_logo_data.h
- replace the two arrays in the file with what my tool generated
- save
- build
- flash
- ????
- profit!
I modified jokubasver's version of the kobra neo firmware and seems like got Lin_Advance working. Also I increased the acceleration. Can't say if it's safe to run, so run on own risk
- Increase probing accuracy by doing multiple probes per point
- Increased speed for the first Z-probe approach when double-probing
- Enabled quick home (X and Y homes at the same time)
- Set default mainboard fan speed to 5 instead of 255
- Enable M117 Gcode for setting messages to printer screen
- Enable M73 Gcode for setting progress bar on printer screen
- UI changes - black background, removed ugly yellow text color
- Add personal PID and E-Step values
- LIN_ADVANCE working atleast for me with K value being 0.12 (V1.5 Marlin!)
- Increased
Copy firmware.bin to your microSD card, insert the card with the printer off, turn printer on and wait until you get to the home screen. Afterwards, delete the firmware.bin file from your card.
Perform a PID autotune and calibrate your e-steps! This firmware contains values for my own printer, but even the stock firmware does not have great values.
Even after doing all the hardware and mechanical touch-ups, I was not getting great prints. This was solved by calibrating E-steps, as they were quite off (instead of extruding 100mm of filament, my printer extruded 95mm before calibration), so make sure you do that as well.
Instructions can be found here:
PID Autotune: https://teachingtechyt.github.io/calibration.html#pid
E-Step calibration: https://teachingtechyt.github.io/calibration.html#esteps
If you are building the firmware yourself, you can include your personal PID and E-step values in the firmware's Configuration.h file: https://github.com/jokubasver/Kobra_Neo/commit/a33ebd921d4031b541fb395de72f8292334ff8a0
Having these values saved in the firmware itself could save a lot of headaches, as If the EEPROM for whatever reason was to clear, your values will not dissapear.
https://www.reddit.com/r/anycubic/comments/y2waxu/tutorial_how_to_build_anycubic_marlin_source_code/
https://github.com/jokubasver/Kobra_Neo
https://github.com/sjorge/Kobra_Neo_Fw