Originally Posted by JFettig Thanx for the info guys, Im looking for a close, but not extremely acurate measurement. I think I will try the string and bucket thing. Ill have to find some weights of some sort.
Instead of using a spool, Ill use a rod with 3 holes, 1" apart, just have nothing in the one hole sticking out the side and the string hanging off the other.
Thanx
Jon |
Use the disk, with the string wrapped loosely around the disk. You
can spin the motor at whatever speed you are interested in, and then
when you pull the string tight, it will load the motor. Use a windlass
arangement, rather than a winch.
This will allow you to find the torque of the motor at various speeds,
rather than only the static torque. At any speed of interest, get the
motor up to speed, then see if it can lift the current load. If it can
move that load, increase the load, untill you find the torque capability
of the motor for the speed in question.
Untill you apply tension to the string, there is no loading on the motor.
Without tension, there is no friction. You only need to apply enough
tension to develop friction, not enough to affect the torque measured.
Pete