Dual Stage Rack & Conveyor 

Symbol  Description  Units 

J_{DM} 
Inertia of drive mechanism 
kgm^{2} 
T_{DM} 
Torque of drive mechanism 
Nm 
a_{DM} 
Rotational acceleration 
rad/s^{2} 
h_{1} 
Efficiency of stage 1 pinion transmission 
1 
h_{2} 
Efficiency of stage 2 belt transmission 
1 
q 
Incline angle above horizontal 
^{o} 
m_{1} 
Friction coefficient for stage 1 

m_{2} 
Friction coefficient for stage 2 

g 
Acceleration due to gravity = 9.81 
m/s^{2} 
m_{Load} 
Mass of load + payload 
kg 
m_{CB} 
Mass of counterbalance 
kg 
m_{Belt} 
Mass of belt 
kg 
m_{Rack} 
Mass of rack 
kg 
m_{Stage2} 
Mass of stage 2 
kg 
m_{IP1} 
Mass of idler pulley 1 
kg 
m_{IP2} 
Mass of idler pulley 2 
kg 
J_{P} 
Inertia of pinion 
kgm^{2} 
J_{IP1} 
Inertia of idler pulley 1 
kgm^{2} 
J_{IP2} 
Inertia of idler pulley 2 
kgm^{2} 
r_{P} 
Radius of pinion 
m 
r_{IP1} 
Radius of idler pulley 1 
m 
r_{IP2} 
Radius of idler pulley 2 
m 