a simple case
If i have a gear and a a ground body.the gear rotates through a motor.then
DOF=6M-N-O
in this case M is the bodies except ground which is 1
N is the total number of contraints imposed by joints.in my cas it is pin so it restricts 5 constraints
O is the driver which is 1.
Putting these in the Grubler equation gives
DOf=6*1-1*5-1=0
but i know that it should be one degree of freedom.ie as it rotates
the system types measures of DOF also gives 0.
What is the reason it gives 0 instead of 1.