Re: (ET) can't get out of first speed in D1

["Briggs, Michael" <Michael Briggs unh edu>]

Harold,
You responded to my post last November describing a problem I was having 
with my tractor, and I didn't notice your message, so I never responded. 
So, 5 months later, I stumbled upon it.
Anyway - the description of the problem is below. You asked what my pack 
voltage is. I should be doing the first mowing of the spring within the 
next few days, and will see if the problem persists, and also measure the 
pack voltage. 

Mike        


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

________________________________________
From: Harold Zimmerman - Clean Power Supply <cleanpower att net>
Sent: Monday, November 14, 2016 5:51 AM
To: Briggs, Michael; elec-trak cosmos phy tufts edu
Subject: Re: (ET) can't get out of first speed in D1

 What is your pack voltage?

On November 13, 2016 at 11:07pm -0500, you wrote:

>So, I thought I had this issue figured out. When I mowed several weeks 
>ago, I couldn't get the tractor out of first speed - took a very long 
>time to mow. It would go to the higher speeds when in neutral, but not 
>while in gear (I only tried D1). I figured it was because I hadn't fully 
>charged the battery pack, and the thermistors were keeping it from going 
>to the higher speeds due to the voltage sagging from the higher current 
>draw when in gear.
>
>A couple weeks later, I mowed, the pack was fully charged, and it worked 
>fine. Today I tried to mow with a fully charged pack, and it wouldn't get 
>out of first speed while in D1 again. While in neutral it would. Seemed 
>like maybe the thermistor issue, although surprising since the pack was 
>charged. But then I put it in L1, and found that it would go to the 
>higher speeds with no trouble. That has me confused. If it was a 
>thermistor issue, then it shouldn't have gone into higher speeds while in 
>L1. So, what's the deal? Any ideas?
>
>Thanks,
>
>Mike
>
>________________________________
>Michael S. Briggs, PhD
>UNH Physics Department
>(603) 862-2828
>________________________________
>
>_______________________________________________
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