Check for carbon packed between commutator? segments or shorted
or open windings, you need a low reading ohm meter for an accurate
check.? Perhaps run it on about 6 volts and load it down and check
for dead or weak spots in the rotation.? Dead spots are usually
open or shorted windings.
On 4/29/24 17:43, vt_biketim wrote:
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Not specifically a Unimat question, but some people here seem to
know a heck of a lot about brushed, DC motors. Do these permanent
magnets get tired after a while? I scavenged one from a lawnmower
labeled 24VDC/500 W/4300 rpm. When I hook it up directly to the
24V battery pack it only gets up to maybe 300 rpm. I replaced the
brushes and made sure the bearings spun nicely and the battery is
fully charged. Am I missing something, or is it junk?
Tim in Vermont
