this is my first post here. Should've got involved years ago, but via Raspberry Pi ended up here eventually.
I need help selecting a motor/drive. I want to control a sliding door that controls how much fertilizer flows out of the hopper bin above. The metal slide is probably 5 x 10cm, and moves with little effort.
My idea is to control the opening with 3 buttons (1. fully closed 2. open for light spreading 3. open more for heavy spreading).
I have already written a little code and it works in conjunction with some buttons on a breadboard all of which is hooked to a little servo. The problem with the servo is that the motion is circular, but the metal slide on the fertilizer needs linear movement.
My first thought was to use someone's 3d print in conjunction with a continuous servo. However I've had trouble controlling the continuous servo. It needs to rotate a certain amount in a certain direction and then stop.
So finally I though I'd just buy a linear actuator. But now I'm confused. Do I need any linear actuator? Do I need one with a potentiometer for position feedback? Or do I need a linear servo? Is there even a difference? :o
Thanks in advance.