Belt Drive - Intermittent

Load torque, acceleration torque, required torque and inertia ratio for motor sizing.

Belt + workpiece mass (kg)

Friction coefficient

Drum diameter (m)

Drum mass (kg)

Belt/roller efficiency

Reducer efficiency

Reduction ratio

Positioning time (s)

Move distance (m)

Accel/decel ratio

External force (N)

Incline angle (deg)

Safety factor

Motor rotor inertia (kg.m2)

F = mL·g·μ + FA
T_L = F·(D/2) / (η·ηG)
J_L = (mL + 2·m2)·(D/2)²
T_S = (J_L / i²)·β·i ;  T_M = (T_L + T_S)·S
T_RMS = √( Σ T_k²·t_k / Σ t_k )

If inertia ratio > 5, use a reducer to improve matching.