My team is building a Sea Perch-style ROV to run an obstacle course and I'm trying to select appropriate potentiometers to control the speed of its motors.
Our idea is to use one vertically-mounted motor to provide downward thrust to counteract the ROV's positive buoyancy. We were planning to just use a potentiometer to control the speed of that since it'll be constant.
The forward thrust and turning would be provided by a motor on each side controlled by one DPDT switch each. One of our guys had the idea of wiring another pot between the power source and the DPDT switches so we could dial down the speed of the motors for fine maneuvering or dial it up for straightaways.
The motors we're using are these:
Voltage Range: 6V-12V. Nominal Voltage: 12V. Current: 0.14A. RPM: 12,500 max. Torque: 44.2g/cm. Terminal Type: Solder. Shaft Dia.: 2mm. Shaft Length: 10mm. Size: 24mm dia. x 32mm length.
The power source is six AA batteries, so 9V total.
We don't really want to wait for shipping, so I figured we'd end up just going to Radio Shack.
Since this is such a low-powered setup should I just find the lowest maximum-resistance pot I can?
Our idea is to use one vertically-mounted motor to provide downward thrust to counteract the ROV's positive buoyancy. We were planning to just use a potentiometer to control the speed of that since it'll be constant.
The forward thrust and turning would be provided by a motor on each side controlled by one DPDT switch each. One of our guys had the idea of wiring another pot between the power source and the DPDT switches so we could dial down the speed of the motors for fine maneuvering or dial it up for straightaways.
The motors we're using are these:
Voltage Range: 6V-12V. Nominal Voltage: 12V. Current: 0.14A. RPM: 12,500 max. Torque: 44.2g/cm. Terminal Type: Solder. Shaft Dia.: 2mm. Shaft Length: 10mm. Size: 24mm dia. x 32mm length.
The power source is six AA batteries, so 9V total.
We don't really want to wait for shipping, so I figured we'd end up just going to Radio Shack.
Since this is such a low-powered setup should I just find the lowest maximum-resistance pot I can?