I'm an artist with decent mechanical skills, trying to create a 30x30 inch artwork weighing around 40 lbs that slowly rotates on a vertical wall and stops after a 90-degree turn. I want it powered by a rechargeable battery to keep the mechanics hidden behind the art without visible wires. I need recommendations on the type of motor, gearbox, and possibly a control system (mechanical or electronic) that would allow for this kind of setup. The piece visually changes based on the viewing angle, and I want the element of surprise with it rotating by itself. Any advice on how to get started with this project would be much appreciated!
3 Answers
If you're just rotating the artwork back and forth through that 90-degree angle, a linear actuator might be a neat option. It'll keep things compact while providing the movement you need without too much hassle!
I’d suggest a chain and sprocket mechanism like a bicycle chain system. You can set up the sprocket ratios to adjust for the needed turning speed and torque. A stepper motor hooked up to something like an Arduino would give you a great way to control the rotation precisely!
Have you already started building your artwork? First, it's important to figure out the power requirements to both rotate it and hold it still. You might want to consider using bearings for a smooth rotation and possibly a bicycle chain coupling to connect to the motor. It could help to quantify how much torque you might need based on the vertical weight distribution too!
I have built a smaller version but haven’t finished the painting yet. I used a lazy Susan bearing with stops. How do I figure out the right power for the motor? I assume it’s not just about the weight, right?