I'm working on a trash bin which lid is controlled (opened/closed) by a microcontroller and thus i decided to use a servo motor.
The lid is 47 x 47 x 0.1 cm and because its made from steel has a density of 7.874 g/cm^3. Assuming uniformity, this means that this lid has an inertia moment of 0.096057 kg.m^2 with the axis being on the bottom-middle of the lid. I want the servo to be able to open the lid 60 degree in 2 seconds for convenience reasons.
When choosing from a variety of servo motors, i noticed that they write torque not in Nm but in Kg/cm which makes no sense to me. I just gave it a shot and use a 17 kg/cm servo and placed it in the middle of the lid but apparently its not strong enough. So how to properly calculate the right spec of a servo motor given this application ? Thank you so much beforehand i'm still new to this