HDMI7 vertical holder for 2020 extrusion

Heavily inspired by TacticalBeanies mount here, I created this vertical mount for the BigTreeTech HDMI7 touch screen.

Note that this version will NOT fit the v1.2 (or newer, probably, should one ever come out). My model assumes the connectors are at the edge of the screen, and with the 1.2 model BTT moved the connectors more to the middle of the circuit board on the back.

There were various little tweaks I wanted to make to that model, but the list became so long that I decided to just start from scratch instead. This model consists of 3 main parts: the base (holding the screen), the chin-cover (covering the space that the 90 degree connectors are in) and the bracket that mounts everything to a 2020 extrusion.

The arrangement allows you to:

• Tweak anything to the base. Do you want to mount the base slightly more down or up from the bracket? Move the mounting holes! Do your 90 degree connectors require more/less space? Adjust the hole in the bottom!
• Print the whole thing without supports. The chin cover is separate, and doesn't require any supports. Want to do something fancy with an RGB led under a logo or something? Go ahead and design it!
• Mount the whole thing to a different kind of extrusion, or at a different angle? Adjust the bracket as needed!

Hardware needed:

• 5x M3x4x4 heat insert
• 4x M3x6 (original m3 mounting screws that came with the HDMI7 screen)
• 3x M3x8
• 2x M5x8
• 2x M5 t-nut or captive spring nut
• 90 degree angled HDMI connector. Note that this connector has to point down, ie away from the rounded side of the connector. See here (thanks, TacticalBeanie) for an example.
• 90 degree angled USB-C connector. Since this connector isn't orientation sensitive, any will do.
• For both connectors, ‘shorter is better’.

Assembly instructions:

Print the parts. Put in the heat inserts (3 in the bracket, 2 in the chin cover). Screw the bracket to the base. Insert the 90 degree connectors. Screw the screen to the base. Screw the chin cover to the base. Both the screen and the cover will be a very snug fit, but ought to just go in if your printer is tweaked right. Insert the nuts in the extrusion and screw the bracket to the extrusion. Attach cables to connectors. Voila!

Print instructions:

Since the holder will generally be mounted outside of an enclosure there are no specific demands on what material you use, because it shouldn't get hot enough to cause even PLA problems. You might still consider using ABS or ASA if you run the risk of bumping into it a lot since ABS and ASA tend to be a little more able to withstand bumps and knocks than PLA.

I used Gratkit PLA Blue, 0.4mm nozzle, 0.4mm width, 0.15 layer height, no supports, no rafts. You will need to flip the chin cover, since it's oriented as it is in the CAD design in the STL file. Just print it with the flat side down. It is also my recommendation to use a print surface with very mild or no texture for that since I personally find the effect standard PEI texture leaves in the print to be annoying for such a visible part.