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Re: (ET) one blade not cutting well




Dave - yup, that was actually the first thing I did when I noticed the problem - propper the deck up and fired the blades up so I could make sure they were spinning the same way.

Mike

--

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

On Wed, 26 Jul 2006, David C Robie wrote:

Current varies widely as to how much work the blade is doing.  She can
get to 25A

Have you verified that it's turning in the same direction as the others
yet?

Dave
Weymouth MA


On Wed, 26 Jul 2006 13:03:43 -0400 (EDT) Michael S Briggs
<msbriggs alberti unh edu> writes:

Why not just put an ammeter in series? How much current do these
mower
deck motors normally pull? As long as it's <10A, I have some nice
multimeters that can measure currents up that high. I can just pop
the
lid, disconnect the leads, and put the multimeter (in ammeter mode)
in
series with the motor.
        Or is the current >10A normally?

Thanks,
Mike

--

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

On Wed, 26 Jul 2006, Klein Robert W NPRI wrote:

You could also remove the top caps from the mower motors and
install a shunt on one leg, reading with a generic VOM Meter.

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 steves
Sent: Tuesday, July 25, 2006 6:43 PM
To: Elec-trak cosmos phy tufts edu
Subject: Re: (ET) one blade not cutting well


Most clamp-on meters are AC, but they make AC/DC clamp-ons too.
They use
a hall effect probe and are very accurate though you need to set
the
zero periodically (like old-time ohmmeters). They are also
considerably
more expensive than AC only meters - $80+ (even on ebay). But very
handy....

_ SteveS


David C Robie wrote:

How the heck are you gonna get a clamp on meter to read DC?    I
have an
old fashioned handheld  'generator and starter'  tester that
reads the
magnetic field through a DC wire, but it is not accurate.
couldn't
discern less than 5a or so difference.

Dave
Weymouth MA






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