Les Newell wrote:
Mariss increased the I term to smooth out the motion at low speeds. In my experience with tuning motors, increasing I slows down the response rather.
Yes, if the drive is applying 50% of available current to fight velocity ripple, it is
going to affect performance and responsiveness.
I used treadmill motors from www.surpluscenter.com. These ones are similar to the ones I bought: <> They are cheaply made motors but they do use ball bearings. Torque and velocity ripple are surprisingly low.
Since treadmills are often run fairly slowly, and nasty motors with lots of cogging
tend to whine loudly, such a motor might be excluded from a treadmill. If people can't
hear their Walkmans while exercising, that would be a problem.
Jon
