I need some buying advice…
What I want to do:
[li]Lift a weight of 5 kg over a distance of 50 cm within about 1 second (from bottom to 50 cm height; even 2 secs would be okay)[/li]
[li]option a: when there is a power outage, the weight should drop to the bottom (==> no motor break)[/li]
[li]option b: when the weight is larger than 5 kg, feedback to the controlling computer (this especially applies in a case where there is an obstacle in the way of the weight lifting up: I want to have the weight going back to the floor then)[/li][/ul]
All this should be programmable (computer, arduino, raspberry, …?).
What I found out:
If I omit option b (which is okay for now), it seems that a step motor would be a good solution. But in that case…
[li]can a step motor hold a weight over a long time span (an hour)?[/li]
[li]I do not know how to control such a motor with enough power. Option “AMIS-30543 Stepper Motor Driver Carrier” seems to be powerful, but how to control it from a computer? “Pololu Dual VNH5019 Motor Driver Shield for Arduino” seems to be the most powerful option, and is controllable via an arduino, but can it control step motors?[/li][/ul]
Servo motors seem to be a nice solution, too - and it seems as if a “Power HD High-Torque, High-Voltage Digital Servo 1218TH”, controlled by a “Micro Maestro 6-Channel USB Servo Controller (Assembled)” could provide me with all necessary options, right? The YouTube video is very helpful. But is option a feasible? What does the motor do when the power supply fails?
As you probably see by my questions, I am a beginner in motor-things. It would be nice to get some advice and a product combination recommendation!