JGMaker Magic BLtouch holder

thingiverse

This was inspired by https://www.thingiverse.com/thing:4541909 as a start, but I wanted to improve rigidity as well as its stability. With a ridge in the back against the metal shell, it can no longer rotate. Mounting instructions: Read https://cnorton-webdev.github.io/ C. Norton did the hard work of sorting it all out. -Take a picture of the BLtouch and the cable (for color matching later on) -raise the gantry by 10 to 15 cm then unplug the power cable. -remove the screw on the right of the extruder shell. -install the BLTouch holder and tighten the screw you removed at the previous step. -Insert the cable through the upper part and connect it to the BLtouch -Slide the BLTouch in, and tighten the screws from below. -Ziptie the cable to the part you just added, and along the extruder cable, down to the motherboard. -Remove the Z stop switch (it's not needed anymore) -Disconnect the Z stop switch cable from the motherboard and connect BLtouch 2-wire connector instead -Connect BLtouch 3-wire connector according to Christopher Norton's instructions. (soldering header pins on Y+) Be careful: the Dupont connector provided may not have the pins in the right order (S-G-V) so you need to double check that with the picture taken earlier. -Put everything back -Modify firmware code. Resulting offset in the code, for this mount, is as follows: \#define NOZZLE_TO_PROBE_OFFSET { 47, 4.5, 0 } I cooked a 2.0.9.2 firmware with Unified Bed Leveling wizard: I extracted the changes that C. Norton made to 2.0.5.4 and transposed them to 2.0.9.2. Added a few options like UBL. Files are attached in the zip archive. How to use: download Marlin 2.0.9.2 source from github. Replace files (one is located in src/pins/ramps). Install Arduino IDE. Set board as "Arduino Mega or Arduino 2560". Install library u8glib. Compile, upload through usb. I added 2 hex files created by Arduino IDE, but I don't know which one to upload with Cura. I used this BLTouch clone: https://www.aliexpress.com/item/32963580738.html This in an interesting read: https://teachingtechyt.github.io/upgrades.html#bltouch Credits: Christopher Norton who made it possible. DaHai Zhu