BTT HDMI5 V1.2 case for Elegoo Neptune (3/4) and others

Case for BigTreeTech HDMI5 display V1.2 with outlets to the back. Different mounting options.

The backplate has different mounting options for landscape or portrait in different positions. Just chose the screw holes for your needs. You need the mounting adapter HDMI5_MOUNT_V2_PORTRAIT.stl from the original design (portrait version for all mounting options) https://www.printables.com/de/model/472777-bigtreetech-hdmi5-mount-for-elegoo-neptune-3-propl/files to connect it to your printer.

The case has three holes with little pins at its side to use the displays buttons (brightness and screen flip). You can chose to print the tricky pins or just let them out an use a bit of filament for pressing the buttons.

The case is designed to snap onto the display so that no threaded inserts for the case are needed.

Printing instructions:

I used a 0.6 mm nozzle for all parts. Just ensure that your slicer can print “thin walls” or line width thinner, e.g. 0.4 mm. For the button pins a 0.4 mm nozzle would be better.

a) Backplate:

• 0.3 mm layer height
• 30 % grid infill
• no support

b) Top/Case:

• 0.2 mm layer height
• 30 % grid infill
• no support

c) Button pins (3 pieces):

• 0.1 mm layer height
• 100 % concentric infill
• no support
• small brim
• very, very slow printing speed (15 mm/s)
• play with retraction distance and retraction speed
• higher bed plate temperature than normal
• allow cooling each layer by printing 3 pieces at a time spread over the print bed
• I had to print mine several times for a satisfying result

d) Mounting adapter https://www.printables.com/de/model/472777-bigtreetech-hdmi5-mount-for-elegoo-neptune-3-propl/files:

• 0.3 mm layer height
• 30 % cubic subdivision infill
• no support

If the parts are to tight to your display, you can change the parameter “margin” in the attached Fusion360 file. 

Additional Parts:

• 2 threaded inserts M3
• 2 screws M3 x 12 or M3 x 16
• 4 screws M3 x 12 or M3 x 10
• 3 screws from original Elegoo mount 

Assembling instructions:

1. Press the threaded inserts into the mounting adapter
2. Screw the Backplate to the mounting adapter; chose the mounting option you like
3. Use a tweezer or tong to put the three button pins into the holes of the case
4. Put the display into the case and slip it over the two noses at the sides; the display is now fixed in the case
5. Put the display case onto the backplate and use the 4 screws to fix it
6. Screw the mount to your printer

Instructions for klipper screen (rotation):

Use detailed instructions from https://klipperscreen.readthedocs.io/en/latest/ and for rotation from https://klipperscreen.readthedocs.io/en/latest/Troubleshooting/Rotation/

1. Raspberry Pi using kernel cmdline
Adding video=HDMI-A-2:800x480M@60,rotate=90 to my /boot/cmdline.txt did the console rotation. You have to figure out your hdmi port.

2. Universal xorg configuration
Just as described in this section. Note that for my Raspberry Pi the hdmi port in 90-monitor.conf differed from cmdline.txt.

3. And I had to rotate the input matrix of the touch screen by adding the line
Option "TransformationMatrix" "0 -1 1 1 0 0 0 0 1"
to the touch screen section of /usr/share/X11/xorg.conf.d/40-libinput.conf

The BigTreeTech HDMI5 display V1.2 has it´s HDMI and USB-C outlets to the back. The old version had it to the side. So I had to redesign the case and mount for my Elegoo Neptune 3 Pro printer from the scratch.