From: "Raymon R. Ellis" <rayellis direcway com>
To: 'Elec-Trak Digest' <elec-trak cosmos phy tufts edu>
Subject: (ET) Safe E20 RPM
Date: Thu, 21 Oct 2004 20:55:46 -0400
I'm continuing on my fun filled project of installing an Alltrax Inc DCX
300-ET controller in my E20. My main motor brushes and bearings checked out
OK for further use. With the help of many of you the conversion is about
finished except for connecting the lights and PTO, wire dressing, securing,
and closing up. Will someone now tell me the rpm range of the E20 Elec-Trak
motor? I have searched the Digest but have not found where anyone has
published actual motor rpm numbers. Some one advised that mowing should be
performed at an rpm which is not excessive and at an efficient level to
avoid damage to the main motor. I actually want to experiment with a
resistor of a size that may maintain a safe and efficient main motor rpm
while cutting the grass. I use a digital photo sensor tachometer for
accurate rpm measurements so I reasoned that if I knew the safe long term
running speed of the motor the best resister size could be determined. When
that size is found I will set up an alternate speed control dedicated to
mowing. What is the maximum speed that may be considered too high? Someone
wrote "do not rev the motor too high" or it will fly apart or something bad
will happen. Any comment you make will be appreciated. Thank you, Raymon
Ellis
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