torque calculation

I'm trying to calculate the torque of my model so i can correctly spec a motor to rotate it. As we all know, t=Ia where 't' is torque, 'I' is moment of inertia, and 'a' is the angular acceleration.



The mass is going inside a torque motor... think of the motor as a
donut and the mass as a munchkin spinning in the middle, however the
mass is not symmetric.



Center of mass: ( millimeters )

X = 0.1283

Y = 3.6911

Z = 0.4753



I have centered the model such that it will rotate at the output coordinate system about the Y axis like it would in real life.



Moments of inertia: ( grams * square millimeters )

Taken at the center of mass and aligned with the output coordinate system.

Lxx = 9009.2180 Lxy = 116.3216 Lxz = -179.7757

Lyx = 116.3216 Lyy = 9102.2187 Lyz = 86.0433

Lzx = -179.7757 Lzy = 86.0433 Lzz = 10804.8404



What values do I use to calculate the torque?! What is their naming convention for their variables?!



NOTE: The velocity is going to be 120 RPM, but I haven't yet figured out the actual acceleration.

You've made a simple thing sound complicated.


If you know the centre of mass and you know the perpendicular distance of that mass from the axis of rotaion then its a simple calculation for torque:


T = dm


where


d=perpendicular distence from axis of rotaion of the center of mass


m=mass of object