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Main
Date: 20 Aug 2006 01:11:25
From: Mary
Subject: Cateye Mity 8 Computer
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Recently purchased this computer. For the life of me I cannot figure out
how far down the fork to put the sensor. When I mounted my last computer
it was clearly outlined in the directions. Have looked online but to no
avail. Anyone use this computer? Thanks
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Date: 21 Aug 2006 00:38:57
From: Eric Williams
Subject: Re: Cateye Mity 8 Computer
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I've always been told to mount it as close to the hub as possible. The
reasoning behind this is that the closer the magnet is to the center, the
slower it will turn. With the magnet mounted closer to the rim this could
cause erratic readings at higher speeds since the magnet passes the sensor
much faster. I haven't experimented with this but it does make sense.
"y" <Sharkm@netcarrier.com > wrote in message
news:44e7eef7$0$177$ad3619e8@news.netcarrier.net...
> Recently purchased this computer. For the life of me I cannot figure out
> how far down the fork to put the sensor. When I mounted my last computer
> it was clearly outlined in the directions. Have looked online but to no
> avail. Anyone use this computer? Thanks
>
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Date: 20 Aug 2006 15:53:57
From:
Subject: Re: Cateye Mity 8 Computer
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Don Piven wrote:
> NanC wrote:
> > On Sun, 20 Aug 2006 01:59:20 -0400, "Rich Clark"
> > <rdclark2SPAM@TRAPcomcast.net> wrote:
> >
> >> "y" <Sharkm@netcarrier.com> wrote in message
> >> news:44e7eef7$0$177$ad3619e8@news.netcarrier.net...
> >>> Recently purchased this computer. For the life of me I cannot figure out
> >>> how far down the fork to put the sensor. ...
> >> It doesn't matter. A rev is a rev is a rev.
> >>
> > Themagnetically induced spike's amplitude is related to, among other
> > things, velocity. If mounted too close to the hub, the sensor may
> > miss pulses at low speeds.
> > About halfway out should be fine.
>
> Except the Cateye's sensor is a simple magnetic reed switch; there is no
> "induced spike", just a contact closure that will not be significantly
> dependent on the speed of the passing magnet. ...
> Responding to the original poster, if there is no limitation to where
> you have to put the wheel magnet
The OP asked how far down to mount the sensor. The answer is just far
enough down to align with the magnet.
Mounting higher than the point at which the rim passes betwen the forks
will unnecessarily complicate mounting the magnet, as will mounting
below the o/s diameter of the hub flange
best wishes
james
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Date: 20 Aug 2006 01:59:20
From: Rich Clark
Subject: Re: Cateye Mity 8 Computer
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"y" <Sharkm@netcarrier.com > wrote in message
news:44e7eef7$0$177$ad3619e8@news.netcarrier.net...
> Recently purchased this computer. For the life of me I cannot figure out
> how far down the fork to put the sensor. When I mounted my last computer
> it was clearly outlined in the directions. Have looked online but to no
> avail. Anyone use this computer? Thanks
It doesn't matter. A rev is a rev is a rev.
RichC
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Date: 20 Aug 2006 06:57:06
From: NanC
Subject: Re: Cateye Mity 8 Computer
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On Sun, 20 Aug 2006 01:59:20 -0400, "Rich Clark"
<rdclark2SPAM@TRAPcomcast.net > wrote:
>
>"y" <Sharkm@netcarrier.com> wrote in message
>news:44e7eef7$0$177$ad3619e8@news.netcarrier.net...
>> Recently purchased this computer. For the life of me I cannot figure out
>> how far down the fork to put the sensor. When I mounted my last computer
>> it was clearly outlined in the directions. Have looked online but to no
>> avail. Anyone use this computer? Thanks
>
>It doesn't matter. A rev is a rev is a rev.
>
Themagnetically induced spike's amplitude is related to, among other
things, velocity. If mounted too close to the hub, the sensor may
miss pulses at low speeds.
About halfway out should be fine.
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Date: 20 Aug 2006 08:48:24
From: Don Piven
Subject: Re: Cateye Mity 8 Computer
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NanC wrote:
> On Sun, 20 Aug 2006 01:59:20 -0400, "Rich Clark"
> <rdclark2SPAM@TRAPcomcast.net> wrote:
>
>> "y" <Sharkm@netcarrier.com> wrote in message
>> news:44e7eef7$0$177$ad3619e8@news.netcarrier.net...
>>> Recently purchased this computer. For the life of me I cannot figure out
>>> how far down the fork to put the sensor. When I mounted my last computer
>>> it was clearly outlined in the directions. Have looked online but to no
>>> avail. Anyone use this computer? Thanks
>> It doesn't matter. A rev is a rev is a rev.
>>
> Themagnetically induced spike's amplitude is related to, among other
> things, velocity. If mounted too close to the hub, the sensor may
> miss pulses at low speeds.
> About halfway out should be fine.
Except the Cateye's sensor is a simple magnetic reed switch; there is no
"induced spike", just a contact closure that will not be significantly
dependent on the speed of the passing magnet. (The only computers I am
aware of that do depend on induced signals are the Avocets, and they use
a 20-pole magnet ring mounted at the hub.)
Responding to the original poster, if there is no limitation to where
you have to put the wheel magnet (IIRC some Cateyes had a magnet carrier
which wrapped around two spokes, so the magnet and sensor had to go
about mid-wheel), I'd put it as close to the hub as you can get it,
mostly because that lets you tuck the sensor in back of the fork blade
instead of having it stick out toward the spokes.
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