I'm using a 12V dc motor. The motor is strong, it can output approximately max. 8 Nm by a gearbox.
I'm controlling it with motor controller by PWM controlling and arduino uno.
While using the system i noticed a strange thing. If PWM 0 (zero) is applied to the motor controller then it is harder to move the motor's shaft, than when i completely cut off the system from the power source. So i understand that it is hard thing to move the shaft because in that situation the gearbox works backwards, but i can always move it easily and smoothly. But it seems that simply connecting the motor to the motor controller and the turned on power source (while the PWM signal is still zero!) gives the motor a greater inner resistance. I have to use a little bit greater force to move the shaft and the movement is far from smooth also (much more choppy).
What could cause this? Could i somehow eliminate this phenomenon?
I'm using a twirl 12v dc motor pg52zy, bts 7960 motor controller, arduino uno, and a modified 750W pc power supply.
I'm controlling it with motor controller by PWM controlling and arduino uno.
While using the system i noticed a strange thing. If PWM 0 (zero) is applied to the motor controller then it is harder to move the motor's shaft, than when i completely cut off the system from the power source. So i understand that it is hard thing to move the shaft because in that situation the gearbox works backwards, but i can always move it easily and smoothly. But it seems that simply connecting the motor to the motor controller and the turned on power source (while the PWM signal is still zero!) gives the motor a greater inner resistance. I have to use a little bit greater force to move the shaft and the movement is far from smooth also (much more choppy).
What could cause this? Could i somehow eliminate this phenomenon?
I'm using a twirl 12v dc motor pg52zy, bts 7960 motor controller, arduino uno, and a modified 750W pc power supply.