Re: (ET) one blade not cutting well

[Klein Robert W NPRI <KleinRW Npt NUWC Navy Mil>]

Through a clamp-around amp meter on each of the leads motors while 
running.  I bet you'll find you have a tired armature.

Robert W. Klein II
SSGN Deputy Technical Manager AWS/AWSS
1176 Howell Street
Newport, RI 02841
Phone: 401-832-1948
Toll Free:  1-800-669-6892 Ext. 21948
FAX:  401-832-7877
e-Mail: kleinrw npt nuwc navy mil


-----Original Message-----
From: elec-trak-bounces cosmos phy tufts edu [mailto:elec-trak-bounces 
cosmos phy tufts edu] On Behalf Of Michael S Briggs
Sent: Monday, July 24, 2006 4:07 PM
To: elec-trak cosmos phy tufts edu
Subject: (ET) one blade not cutting well



        With the gator blades on (and even when I put the original blades 
back on), the far right blade on my E15 was not cutting well. It seems 
that the motor wasn't spinning that one fast enough, and with the Gator 
Blades, the slow speed resulted in grass accumulating in the "teeth" on 
the backside of the blade, eventually stopping it from spinning altogether 
(which then resulted in lots of grass building up around the blade).
        I swapped all of the gator blades out for the regular Elec-Trak 
blades, and it cut somewhat better since it was at least spinning that 
right blade, and it couldn't accumulate grass in it, but it still didn't 
really cut the grass much - apparently spinning too slow (also the Gator 
Blades used quite a bit more power, especially as the grass built up in 
that blade, and I a couple times had the other mower motors shut off due 
to the thermal breaker cutting out).
        So - I need to figure out why that blade isn't cutting well. It 
seems that the motor for some reason just isn't spinning it fast enough. 
What could be the cause of this? Perhaps worn brushes (but not 
*completely* worn such that it doesn't spin at all)?

Thanks,
Mike

-- 

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Michael S. Briggs
UNH Physics Department
(603) 862-2828
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