Hi,
I am using an unipolar stepper from AstroSyn model SST0017. The specs of this stepper are 12 V / 0.4 A / 30 ohm. The holding torque is 2.4 Kg-cm and rotor inertia 27 g-cm2. This stepper is connected to a ULN2803, and it works fine. The only problem is that it gets very hot, as well as 7812 that is connected to it. Can I use some power resistors in series with the stepper to limit current ? Will this degrade torque ? Do you know another way to solve this ? This circuit will be closed in a wood box, so I don't want it to burn !!
Another drawback I found on this stepper, is that it is too much expensive for the project I am finishing. I would like to know, if anyone knows another brand of steppers, with similar specs but with a lower price ?
Best regards,
Pedro
I am using an unipolar stepper from AstroSyn model SST0017. The specs of this stepper are 12 V / 0.4 A / 30 ohm. The holding torque is 2.4 Kg-cm and rotor inertia 27 g-cm2. This stepper is connected to a ULN2803, and it works fine. The only problem is that it gets very hot, as well as 7812 that is connected to it. Can I use some power resistors in series with the stepper to limit current ? Will this degrade torque ? Do you know another way to solve this ? This circuit will be closed in a wood box, so I don't want it to burn !!
Another drawback I found on this stepper, is that it is too much expensive for the project I am finishing. I would like to know, if anyone knows another brand of steppers, with similar specs but with a lower price ?
Best regards,
Pedro