Hello. I'm brand spanking new to this forum and joined due to this thread. Just recently I decided to put a TV on my patio, but wanted to protect/hide it when not in use, which led me to this thread. I have a balcony, so need to do a flush mount to ceiling. I'm surprised at the cost for a factory unit and more surprised that there is very little DIY projects of this nature out there. (At least from my limited searching)
I've been a motorhead for years, built or modified many cars and have done construction work in my youth, associated myself with a couple of Corvette forums, but never with an AVS forum until now. That being said, I've messed with electonics my whole life too, do most all of my own AVS needs in my home and vehicles, so have the ability and tools to build a lot of things. (And mess things up) I plan to build one of these units and now think I can accomplish at or under $500.00.
I'm assuming the gentleman who first started this thread is no longer interested in doing something of this nature, but glad to see others have kept the thread alive.
Thanks to sCiEnt, I set off on looking at tubular motors, which led me to other threads and eventually to Progressive Automations. I plan to use a linear track actuator motor and found a site that has units which handle 150 lb and 1300lb pulls. They are listed for $150.00 less remote actuation. With the linear track motor, I'll use pulleys and wire cable from garage door parts for the lifing part. My main concern now is the space needed and the type of frame I will build to withstand the stress of pulley mounts and track motor mounts. I don't want to fabricate it out of sheet metal, rather use aluminum pieces and wood. I don't have a DC Tig welder to weld aluminum, so would have to rivet pieces together, which can fatique with time in stress areas. Therefore, the default might have to be 1/8" flat steel plate, which I can weld, bend and fabricate. We'll see.
Here's a picture of the one I will use as my base design.
Here's a url to the motor I plan to use and pricing, but not sure if they sell to individuals or not, just yet.
I am still in the planning stages for the bracket material to use, load calculations, pulley positioning and cable range, but will post my progress and it moves along. This is not the highest priority on my list of home improvements, but I find projects like this fun and challenging.