OUTPUT DEVICES

Measure the power consumption of an output device

Estimate the torque of an unknown motor

Jameco Metal Geared Motor without encoder

Usally this motors came along with a downloadable datasheet in the Jameco web site, but for some reason this is not the case, perhaps it’s just too old an Jameco put it out of stock.

However we need to know if the torque its reliable.

Usually this motors work within 6-12 volts of direct current range.

Just needed to wire the motor to the power supply with the reference value of 12 Volts.

This is a screen shot of the power supply in our lab.

Estimating RPM’s

We need to apply the following formula in order to determine the torque

We do not know the RPM value yet, so with a chronometer and the power supply synchronized together we counted the revolutions in one minute.

By using this formula, we consider: This is by no means able to lift a load bigger than 4.6 gr in a 1 meter lever