I have a door on a spring that automatically closes. I have a dog that has figured out how to push the door open, but much to his surprise it closes behind him. He hasn't figured out how to get out. This makes him sad.
I had some crap laying around so i decided to make a automatic door opener using a nema17 stepper motor that can take 1.3amps max. The stepper driver I got can only output about half that, and even though i am using a geared stepper motor (bondtec extruded i am no longer using) it ain't got enough power. CLICK CLICK CLICK and now i am sad.
So, before i buy more things i figured the first step would be to determine how much torque i need.
How can i determine that?
Right now, the stepper turns a lever that rotates a 1ft aluminum bar. Any ideas? Not sure where to put this since it's not an arduino problem.