Tooth load and torques in Epicyclic Gear trains

If the parts of Epicyclic gear trains are all moving at uniform speeds, so that angular acceleration

are involved, the algebraic sum of all the external torques applied to train must be zero, or
□ (m) = 0 …… …….. ……. …….. ……. (1)

There are at least three external torque for every train , and in many cases there are one only three.

These are

I ) Check the experimental set-up .

2. 
   Give supply to the motor from the control panel
   
3. 
   Adjust the speed of input shaft to some fix value .
   

• 
  4) Apply holding torque just to hold the drum. This must be done carefully.