While the motor is off, I want it to remain stationary. Is it possible in DC motor? I want its axle to stay at its position when no current passes thru it
Unfortunatly DC motors will drag big current when the load gets bigger and they start to heat, plus their velocity will decrease.
Which motor will serve this purpose best? DC motor (Geared or non-geared) or Stepper?
In order to not drag any current at all and save power while there is a backward force affecting the shaft the trick will be in the gearhead.
get a DC motor with a one-way gearhead, this will allow roation in the forward direction while suppressing any backward force.