It helps but what units is the result of that calculation? Clearly I’ve never had opportunity to take high school physics but I did get enough match to know about that formula.
But is the weight of the roman shade the inertia and so long as the result of the power calculation which you provided is greater than the max weight of the roman shade (when raising a roman shade the weight will increase in discrete amounts) I’m OK (assuming I get the units right (NM, ft-lb etc)? I don’t remember enough to take the result of the calculation and apply it to my specific situation (i.e. raising 10 lbs four feet).
And what about holding torque? How do I do the calculation since the angular velocity is zero?
If I see a chart like this:
Which field is the angular velocity? I have a step angle but that only tells me how far it moves per step, not the velocity.
Or this chart:
which doesn’t including positioning torque. How do I know it can hold up the shade?
Or should I not be relying on the motor to hold up the shade and need some other mechanism to keep it in place?