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Originally Posted by Rickertsen2
I have confirmed a suspicion i have had for a while. Apparently the victor 884's do not have a linear PWM input vs. voltage input.
A DVM was attached to a victor and the values recorded while incrementing the PWM input by a set number every 6 seconds. The reason for the initial values being a bit sketchy is that i was using a cheap digital meter that fluctuated a bit. As time went on, i got a little better at figuring what number it was hovering around.
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Erm, so I'm confused. I was under the impression that the Vics have a PWM output instead of a variable voltage output. As such, you can't really measure the output with a standard multimeter. This would be why Mike Betts was talking about checking it with a scope.
This has not bearing on if the RPM output is linear, however. I think I'll do a Simulink model tonight and see how RPM varies with duty cycle, if I can get enough data on motors and the PWM output.