For quite a big project we have to make a lot of linear actuators.
The budget for each has to be around 25 dollars max.
I have made a sketch of a setup im trying now.
But the stepper i am using (mercury motor SM-42BYG011-25) doesnt have enough power around high speeds. It just stalls.
Also using steppers is quite inneficient because of using all seperate drivers.
But i have never worked with dc motors. The position the cart is in has to be pretty precise. Is there a way to control that with dc motors.
The speed it has to turn is pretty high too but maybe there are threaded rods wich have fewer threads per cm. The fewest i have found is 8 per cm.
The movement from top to bottom is around 50 cm. So that would be 400 turns for going from the top to bot position.
Ideally we would want that to happen within less than a second, so that would mean 24000 rpm.
I don't think that is very realistic.
The reason we chose this kind of solution is because there is going to be a elastic material pushing down or pulling up the sled depending on the sled position.
And controlling around 150 dc motors, is that really difficult or doable when you build custom hardware?
We have acces to a fablab and we can outsource some things if it isn't too expensive.
So to sum up:
- What motors would be the best choice?
- Are dc motor positions controllable without expensive equipment.
- Are there threaded rods with fewer threads per cm than 8.