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Originally Posted by wgardner
Did you test the motor at only the 4 points shown in the plot, or at other points? If only the 4 points, then they would suggest that the stall torque is 516 oz-in or below.
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At the 4 points; the graph is a connect-the dots type. I’m ordering an in-line Watts/Volts power analyzer and will repeat again with more points.
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Linear extrapolation of the first 3 points would put the stall torque around 450 oz-in. Would you agree?
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Yes, my data aren’t linear.
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How did you like your DIY experimental setup?
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Was easy to use. With power analyzer and scale hooked to PC (USB), I’d like to be able to log force, Watts, Volts and Amps data to a file for plotting.
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How hot did the wood pieces get?
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Didn’t feel with touch any heat generated.
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How long did you run the Matrix motor stalled, and did it show any signs of failure (e.g., smoking, or reduced performance afterwards)?
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3-4 seconds; long enough to get scale reading. No noticeable effect on motor.
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Did you measure the voltage of the battery
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No, can’t find my volt meter.
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Do you have any comments on the usage and performance of the tachometer
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No problems. I also used it to measure the motor speed of about 11,000 rpm.
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I'd love to see you run the same tests with a Tetrix and Neverest motor to see how they compare on the identical setup, if you'd be willing.
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Will do… other motors are at school and won’t be able to test them until September. We also want to test the secondary gearbox performance we’re adding as part of this project.