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03-05-2018, 02:07 PM | #1 |
Member
Join Date: Feb 2015
Location: Manti, Utah
Posts: 38
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Speedometer Magnet
My Speedometer magnet is dead. How do I recharge it? The speedometer is the oval shaped SW speedometer. It is disassembled. I may have caused the problem by getting the magnet to close to some tools made of ferrous material.
Do you think placing a strong horseshoe magnet across the poles of the speedometer magnet would recharge it? I expect someone to suggest sending it to Papa Nick. That may be an alternative, but I would like to do this myself if possible. That is what I enjoy about this hobby. Any suggestions will be appreciated. |
03-05-2018, 03:22 PM | #2 |
Senior Member
Join Date: May 2010
Location: Western MT
Posts: 218
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Re: Speedometer Magnet
You can charge it up using a strong magnet, be sure to keep the same polarity or it will go dead in short order. I use an electro magnet charger made by Stewart Warner, it has 3 settings, usually use medium. Some times it will overcharge, sometimes I have to use high, just trial and error.
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Mark in MT Always looking for another opportunity to be wrong. |
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03-05-2018, 11:39 PM | #3 | |
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Join Date: Feb 2015
Location: Manti, Utah
Posts: 38
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Re: Speedometer Magnet
Quote:
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03-06-2018, 01:39 AM | #4 |
Senior Member
Join Date: Sep 2010
Location: South Coast NSW Australia
Posts: 2,596
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Re: Speedometer Magnet
I am wondering how you determine north and south on a round magnet?
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03-06-2018, 10:52 AM | #5 |
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Join Date: Aug 2010
Location: Port Orchard, WA
Posts: 1,498
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Re: Speedometer Magnet
Correction: Thanks Mark for refreshing my memory!!
The magnet is a horseshoe shape and the sliding window affects the magnetic field in the air gap between the N and S pole of the magnet which allows calibration. The truncated triangular shaped piece in the attached photos provides the air gap between the N and S poles of the magnet. otos.
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1931 160B & 1931 68B If you don't have time to do it right the 1st time, how do you have time to do it the 2nd time? Last edited by 160B; 03-06-2018 at 12:06 PM. Reason: corrected errors Thanks Mark |
03-06-2018, 11:46 AM | #6 |
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Location: Western MT
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Re: Speedometer Magnet
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Mark in MT Always looking for another opportunity to be wrong. |
03-06-2018, 04:19 PM | #7 |
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Join Date: Sep 2010
Location: South Coast NSW Australia
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Re: Speedometer Magnet
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