Hi all!
For a project I need a motor that makes small turns of about 0.2° and stops (+stay put), another turn of 0.2°, stop etc...
Size is important. It has to be rather small as the motor must fit into a solenoid coil. Let's say it could have a length of 6cm max.
The load mounted on top of the axle is quite lightweight, let's say about 500g.
Speed is not important at all. It will never reach any high speeds.
Positional accuracy is more important.
I have informed myself about stepper motors (using microstepping or a gear to achieve the appropriate step angle). However, these small steppers seem to have very low torque. Closed loop is not possible because of the dimensional limitations, but OK I can do it open-loop.
I don't know much about DC motors though. Are they generally smaller/bigger than steppers. Common sense tells me they must be bigger because of the optical encoder included on DC motors, but I'm not sure.
If somebody has some good knowledge about DC motors (or both) and could give me some advice about the choice of type, that would be greatly appreciated!
Cheers,
Tim
For a project I need a motor that makes small turns of about 0.2° and stops (+stay put), another turn of 0.2°, stop etc...
Size is important. It has to be rather small as the motor must fit into a solenoid coil. Let's say it could have a length of 6cm max.
The load mounted on top of the axle is quite lightweight, let's say about 500g.
Speed is not important at all. It will never reach any high speeds.
Positional accuracy is more important.
I have informed myself about stepper motors (using microstepping or a gear to achieve the appropriate step angle). However, these small steppers seem to have very low torque. Closed loop is not possible because of the dimensional limitations, but OK I can do it open-loop.
I don't know much about DC motors though. Are they generally smaller/bigger than steppers. Common sense tells me they must be bigger because of the optical encoder included on DC motors, but I'm not sure.
If somebody has some good knowledge about DC motors (or both) and could give me some advice about the choice of type, that would be greatly appreciated!
Cheers,
Tim