Quote:
Originally Posted by Lancer Robotics
Some of our mentors have requested that we do our own testing of motors next season. they did not like relying on the published data (and I think they had not checked out CD) So do any of you have an easy device that you have used to get useful data on motors that we could copy and give them the data they want?
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One important question is, “Why do your mentors not trust the given data?”
If they would like you to do this as a “Good stuff to learn project”, I would agree it is good stuff to learn.
If they want you to do this because they feel they are getting out of spec motors or because things they have calculated should work aren’t working, there could be a larger problem here. Often teams will design systems around stall torques neglecting to remember things like friction, efficiencies…. Then those motors you are using to power a winch that should lift the arm in 2 seconds doesn’t seem to have enough torque to get it moving. I know hitting the overpass at 10 fps added a lot of stiction (it really should be a word) to our elevator.
If it is as a “Good stuff to learn project”, Ken P is right, inertia dynos are relatively simple and accurate. National Instruments used to have a $25 data Acq. System (I think it may have even been free to High Schoolers) that can be modified into a decent data system. Otherwise a tac, and a stopwatch can give you good data.