On Fri, 16 Dec 2005 06:35:32 -0500, "George" George@least wrote:

Gentlemen, read the post. It's a treadmill motor with no intrinsic speed,
rather it's controlled by something else which was not replaced.

The intrinsic speed is based on the RPM at full armature voltage. For
example, if the original motor was 2000 RPM, and the new one 1600 RPM,
then what the OP is describing would be what would happen. I
seriously doubt there's a feedback loop (tach), so the controller just
puts out a given DC voltage at a given mph setting, so two different
RPM motors will give different speeds at the same MPH setting, i.e.,
same voltage. (Ignoring field voltage, which is most likely doable in
this case.)

This means the must have been some change in the mechanics, or the
controller, calibrated to the old, needs to be recalibrated to the new, with
its higher draw.

There is no (significant) higher draw at the same load. The higher HP
rating is just what it's capable of delivering, but doesn't change
what is delivered at a given load (heck, HP is a measurement of load).
I'd agree that it needs recalibrated, but the calibration needed is
due to the (suspected) RPM difference, not the HP difference. Whether
that calibration span is available is questionable, of course. If
it's under warranty, as someone else suggested, call the tech and tell
him it isn't fixed. If not under warranty, well, .8 multiplied by
displayed speed equals treadmill speed.

Ricky