Motorized Rail Lift

I created this lift for my television because I don’t have much space in my apartment, but I do have very high ceilings. The TV moves along a vertical pillar using a gear running on a rack, guided by aluminium rails. I used a 12V, 20RPM worm gear motor with 67 kg/cm torque (link below), controlled by an ESP32 running ESPHome (configuration file attached). The television is connected to a smart power socket, allowing the system to automatically detect when it turns on and lower the TV accordingly. For the rails, I used inexpensive square aluminium extrusions with a side length of 11.5 mm from my local hardware store. These are mounted to the wall using the printed “Rail Holders.” I drilled through the extrusions and secured them with screws (see pictures). The carriage slides along the rails with 8 bearings (standard 22 mm skateboard bearings). This project combines laser cutting and 3D printing, produced on my Bambu Lab H2D. The laser-cut parts are made from 3 mm wood. I’ve also uploaded STL files for these parts if you prefer to print them instead—just note that I haven’t tested the printed versions. On the front of the carriage, I included multiple mounting holes so you can attach different devices—not just a TV. For my setup, I printed a VESA adapter that mounts the TV at an angle. Since this angle is specific to my use case, I didn’t include it in the files, but you can find it in the Onshape project. I printed the main gear from carbon fiber-reinforced PA12, as it carries the full weight of the TV. Avoid brittle filaments here. I previously tried using PC, which unfortunately resulted in the loss of a brand-new TV. :( In my build, I also added a cable chain and a steel cable system with a concrete counterweight. However, since this setup is highly specific to my installation, I didn’t include it in this upload. If you’re interested, you can explore it in the Onshape project. This system—especially without counterweights—only works for very light TVs. Mine weigh