Hello,

I am looking for a motor what will rotate 0-360 and then from 360-0 and just keeps repeating this loop. I am looking for something that has speed control, ideally with a potentiometer. I understand this achievable with an aurdino board but looking to see if there is anything out there already created.

 

What power requirement is needed?
What voltage? Transportable? Fixed posn.?
A stepper motor maybe?

 

First thought is a stepper motor. However you are not providing enough information to make a well informed suggestion. Anyway, at a glance a stepper motor with driver and driver driven by a uC (micro-controller). That combination also gives you speed control of the motor. What are you turning as in what force is required?

Ron

 

What power requirement is needed?
What voltage? Transportable? Fixed posn.?
A stepper motor maybe?

12 VDC would work the best but can be flexible. This device will be used to rotate a camera in the water CW then back CCW. The speed of rotation would need to be control ultimately by the user(potentiometer) not within the programming.

 

First thought is a stepper motor. However you are not providing enough information to make a well informed suggestion. Anyway, at a glance a stepper motor with driver and driver driven by a uC (micro-controller). That combination also gives you speed control of the motor. What are you turning as in what force is required?

Ron

This device will turn a camera in the water 360 CW and then 360 degrees CCW. Camera needs to rotate relatively slow so images on the screen can be seen and identified. Camera is about the same size as a larger iPhone.

 

Does the motor require to be submerged?
You would need to know roughly the torque needed.
Does the camera continuously move back and forth?
Some of the advantages of a stepper is no feedback reqd. It can be stalled without harm.

 

Sounds like you want a submersible camera gimbal. Pan and Tilt with rotation.

Ron

 

If moving slowly, then maybe some reduction may be needed in order to avoid the noticeable stepping that may occur if using this type of motor.
Best to keep the motor & mechanism above the water if possible.

 

A stepper is vastly overkill for a project like this. The cheating trick scheme is to have an arm from the rotation part hit a DPDT switch that snaps the rotation to drive the opposite direction. If it is a DC motor then the switch scheme is the way to go. I created just that setup many years ago, the motor rotated a fake radar antenna. It will need to be a PMDC motor with gearing so the speed is not fast, and the switch will need to be rated for more than the motor current.Speed control would be with a variable resistor to drop the motor voltage. That is as simple as it can get. I was about 12 years old when I came up with that. It was mounter in the bottom of an inverted 3-pound steel coffee can that I spray painted grey.

 

A stepper is vastly overkill for a project like this. The cheating trick scheme is to have an arm from the rotation part hit a DPDT switch that snaps the rotation to drive the opposite direction. If it is a DC motor then the switch scheme is the way to go. I created just that setup many years ago, the motor rotated a fake radar antenna. It will need to be a PMDC motor with gearing so the speed is not fast, and the switch will need to be rated for more than the motor current.Speed control would be with a variable resistor to drop the motor voltage. That is as simple as it can get. I was about 12 years old when I came up with that. It was mounter in the bottom of an inverted 3-pound steel coffee can that I spray painted grey.

What? How? is it Master Overkill?
In any case a stepper could do the same as the DC motor you specify, they both need a power supply and controller??
Also depends on whether the OP requires steady speed rate of rotation,

 

When I did it there was no "controller except the toggle switch. No digital logic except that. No stepper driver, no motor driver, just a DC supply delivering the right voltage. AND the stepper driver needs a much cleaner power supply than a PMDC motor. Plus it is physically much bigger than a single DPDT toggle switch. PLUS the stepper driver costs more.