Re: [CAD_CAM_EDM_DRO] Need Source for Large Servo Motors

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:
><http://www.surpluscenter.com/item.asp?UID=2006082403061875&item=10-1783&catname=electric>
>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