speedometer replacement

[Ralph L. Fullenwider]

There was a thread on this some time back about a speedo replacement from
Stephen B. I ordered one as well and had no problem in figuring the math
and programming the new speedo. What I did have a problem with was an extra
wire coming from the back of the unit, one was grey and the other blue. The
grey powers the hot side of the magnetic sensor, I took the blue to be a
ground and was wrong about the blue, removed it out of the circuit and the
speedo worked very well.

I found some calculations on line for the programming. my tires rotate 502
times per mile and that times 60 teeth on the BB drive drum times the
constant give you the ones and 10's binary switch positions and using the
sum of that equation plugged into a second constant give you the hz rate
figure to set the switches up with. Speedo is good and replaces the
original exactly. Thanks Steve

Safe travels,

Ralph and Charolette Fullenwider
"84FC35 "Ruff Diamond"
Duncan, Oklahoma

[cape0001]

thank you ralph
I have other gauges be sure to call and make sure I Have the gauge you want
Stephen 97 BMC 37
888 668 4288


--- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider"
wrote:
>
> There was a thread on this some time back about a speedo replacement from
> Stephen B. I ordered one as well and had no problem in figuring the math
> and programming the new speedo. What I did have a problem with was an extra
> wire coming from the back of the unit, one was grey and the other blue. The
> grey powers the hot side of the magnetic sensor, I took the blue to be a
> ground and was wrong about the blue, removed it out of the circuit and the
> speedo worked very well.
>
> I found some calculations on line for the programming. my tires rotate 502
> times per mile and that times 60 teeth on the BB drive drum times the
> constant give you the ones and 10's binary switch positions and using the
> sum of that equation plugged into a second constant give you the hz rate
> figure to set the switches up with. Speedo is good and replaces the
> original exactly. Thanks Steve
>
> Safe travels,
>
> Ralph and Charolette Fullenwider
> "84FC35 "Ruff Diamond"
> Duncan, Oklahoma
>

[oceanshores98569]

--- In WanderlodgeForum@yahoogroups.com, "cape0001" <sbirtles@...> wrote:
>
> thank you ralph
> I have other gauges be sure to call and make sure I Have the gauge you want
> Stephen 97 BMC 37
> 888 668 4288
>
>
> --- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider"
wrote:
> >
> > There was a thread on this some time back about a speedo replacement from
> > Stephen B. I ordered one as well and had no problem in figuring the math
> > and programming the new speedo. What I did have a problem with was an extra
> > wire coming from the back of the unit, one was grey and the other blue. The
> > grey powers the hot side of the magnetic sensor, I took the blue to be a
> > ground and was wrong about the blue, removed it out of the circuit and the
> > speedo worked very well.
> >
> > I found some calculations on line for the programming. my tires rotate 502
> > times per mile and that times 60 teeth on the BB drive drum times the
> > constant give you the ones and 10's binary switch positions and using the
> > sum of that equation plugged into a second constant give you the hz rate
> > figure to set the switches up with. Speedo is good and replaces the
> > original exactly. Thanks Steve
> >
> > Safe travels,
> >
> > Ralph and Charolette Fullenwider
> > "84FC35 "Ruff Diamond"
> > Duncan, Oklahoma
> >
Didn't know Stephen had speedos for sale.
If I can get one, can you help me set up mine also??

[Ralph]

Hi Bob

The hardest part is going on line to the tire manufacture and find the tire
specs for your drive tires. Your looking for how many revolutions your drive
tire makes in 1 mile. The rest falls into line.
Safe travels, Ralph &
Charolette Fullenwider
'84 FC35 "Ruff Diamond"
Duncan, Oklahoma
Sent via BlackBerry by AT&T

-----Original Message-----
From: "oceanshores98569"
Sender: WanderlodgeForum@yahoogroups.com
Date: Sat, 27 Aug 2011 03:15:03
To:
Reply-To: WanderlodgeForum@yahoogroups.com
Subject: [WanderlodgeForum] Re: speedometer replacement



--- In WanderlodgeForum@yahoogroups.com, "cape0001" <sbirtles@...> wrote:
>
> thank you ralph
> I have other gauges be sure to call and make sure I Have the gauge you want
> Stephen 97 BMC 37
> 888 668 4288
>
>
> --- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider"
wrote:
> >
> > There was a thread on this some time back about a speedo replacement from
> > Stephen B. I ordered one as well and had no problem in figuring the math
> > and programming the new speedo. What I did have a problem with was an extra
> > wire coming from the back of the unit, one was grey and the other blue. The
> > grey powers the hot side of the magnetic sensor, I took the blue to be a
> > ground and was wrong about the blue, removed it out of the circuit and the
> > speedo worked very well.
> >
> > I found some calculations on line for the programming. my tires rotate 502
> > times per mile and that times 60 teeth on the BB drive drum times the
> > constant give you the ones and 10's binary switch positions and using the
> > sum of that equation plugged into a second constant give you the hz rate
> > figure to set the switches up with. Speedo is good and replaces the
> > original exactly. Thanks Steve
> >
> > Safe travels,
> >
> > Ralph and Charolette Fullenwider
> > "84FC35 "Ruff Diamond"
> > Duncan, Oklahoma
> >
Didn't know Stephen had speedos for sale.
If I can get one, can you help me set up mine also??




------------------------------------

Yahoo! Groups Links

[Curt Sprenger]

The Michelin site shows the RPMs per tire size...don't know about the other tire manufactures.

CurtSprenger
1987 PT38 8V92 "MacAttack Racing"
Anaheim Hills, CA
"curtsprenger@gmail.com"

One of the "Birds of a Feather" (BOF) Organizers

On Fri, Aug 26, 2011 at 8:38 PM, Ralph <"rlf47@swbell.net"> wrote:

 

Hi Bob




The hardest part is going on line to the tire manufacture and find the tire specs for your drive tires. Your looking for how many revolutions your drive tire makes in 1 mile. The rest falls into line.

Safe travels, Ralph & Charolette Fullenwider


'84 FC35 "Ruff Diamond"


Duncan, Oklahoma


Sent via BlackBerry by AT&T




-----Original Message-----


From: "oceanshores98569" <"bobandarlene%40earthlink.net">


Sender: "WanderlodgeForum%40yahoogroups.com"


Date: Sat, 27 Aug 2011 03:15:03

To: <"WanderlodgeForum%40yahoogroups.com">


Reply-To: "WanderlodgeForum%40yahoogroups.com"


Subject: [WanderlodgeForum] Re: speedometer replacement








--- In "WanderlodgeForum%40yahoogroups.com", "cape0001" <sbirtles@...> wrote:


>


> thank you ralph

> I have other gauges be sure to call and make sure I Have the gauge you want


> Stephen 97 BMC 37

> 888 668 4288


>

>

> --- In "WanderlodgeForum%40yahoogroups.com", "Ralph L. Fullenwider" wrote:


> >


> > There was a thread on this some time back about a speedo replacement from

> > Stephen B. I ordered one as well and had no problem in figuring the math

> > and programming the new speedo. What I did have a problem with was an extra

> > wire coming from the back of the unit, one was grey and the other blue. The

> > grey powers the hot side of the magnetic sensor, I took the blue to be a

> > ground and was wrong about the blue, removed it out of the circuit and the

> > speedo worked very well.


> >

> > I found some calculations on line for the programming. my tires rotate 502

> > times per mile and that times 60 teeth on the BB drive drum times the

> > constant give you the ones and 10's binary switch positions and using the

> > sum of that equation plugged into a second constant give you the hz rate

> > figure to set the switches up with. Speedo is good and replaces the

> > original exactly. Thanks Steve


> >

> > Safe travels,


> >

> > Ralph and Charolette Fullenwider


> > "84FC35 "Ruff Diamond"


> > Duncan, Oklahoma


> >


Didn't know Stephen had speedos for sale.


If I can get one, can you help me set up mine also??










------------------------------------




Yahoo! Groups Links

[Ralph]

Hi Curt:

Most tire manufactures will have the diameter of their product and will convert that to per mile revs. I run 11 R 22.5 kumoho and the spec is 502 revs per mile. The Mich same size tire turns 501 per mile. As a for instance.

We all run the magnetic pick up that counts the notches on the inside of the break drum. The count for the notches on Birds are 60. And most of the Birds speedometer face value is 0 to 85 mph and with the Teleflex the constant for the 0 to 85 gauge is 0.0236.

So step one of finding the binary switch set up starts with

501 x 60 x 0.0236 = 710.832
This number is the HZ rate

Now we take the HZ rate number and divide it by 23.61, which is the constant for the divide number and will give the binary number that is set up on the program switches in the unit.

710.832 ÷ 23.61 = 30.107. Or rounded up or down to the nearest whole number is 30 and 30 is the binary number for my system.

Now we know the binary divide number and the HZ rate and that let's us program the switches.

The list for the switches is found on the following web site and is in PDF

http://www.v3instruments.com/industrial_...do_odo.pdf


Safe travels, Ralph Charolette Fullenwider
'84 FC35 "Ruff Diamond"
Duncan, Oklahoma
Sent via BlackBerry by AT&T

---

From: Curt Sprenger

Sender: WanderlodgeForum@yahoogroups.com

Date: Fri, 26 Aug 2011 20:58:31 -0700

To:

ReplyTo: WanderlodgeForum@yahoogroups.com

Subject: Re: [WanderlodgeForum] Re: speedometer replacement

The Michelin site shows the RPMs per tire size...don't know about the other tire manufactures.

CurtSprenger
1987 PT38 8V92 "MacAttack Racing"
Anaheim Hills, CA
"curtsprenger@gmail.com"

One of the "Birds of a Feather" (BOF) Organizers

On Fri, Aug 26, 2011 at 8:38 PM, Ralph <"rlf47@swbell.net"> wrote:

 

Hi Bob




The hardest part is going on line to the tire manufacture and find the tire specs for your drive tires. Your looking for how many revolutions your drive tire makes in 1 mile. The rest falls into line.

Safe travels, Ralph & Charolette Fullenwider


'84 FC35 "Ruff Diamond"


Duncan, Oklahoma


Sent via BlackBerry by AT&T




-----Original Message-----


From: "oceanshores98569" <"bobandarlene%40earthlink.net">


Sender: "WanderlodgeForum%40yahoogroups.com"


Date: Sat, 27 Aug 2011 03:15:03

To: <"WanderlodgeForum%40yahoogroups.com">


Reply-To: "WanderlodgeForum%40yahoogroups.com"


Subject: [WanderlodgeForum] Re: speedometer replacement








--- In "WanderlodgeForum%40yahoogroups.com", "cape0001" <sbirtles@...> wrote:


>


> thank you ralph

> I have other gauges be sure to call and make sure I Have the gauge you want


> Stephen 97 BMC 37

> 888 668 4288


>

>

> --- In "WanderlodgeForum%40yahoogroups.com", "Ralph L. Fullenwider" wrote:


> >


> > There was a thread on this some time back about a speedo replacement from

> > Stephen B. I ordered one as well and had no problem in figuring the math

> > and programming the new speedo. What I did have a problem with was an extra

> > wire coming from the back of the unit, one was grey and the other blue. The

> > grey powers the hot side of the magnetic sensor, I took the blue to be a

> > ground and was wrong about the blue, removed it out of the circuit and the

> > speedo worked very well.


> >

> > I found some calculations on line for the programming. my tires rotate 502

> > times per mile and that times 60 teeth on the BB drive drum times the

> > constant give you the ones and 10's binary switch positions and using the

> > sum of that equation plugged into a second constant give you the hz rate

> > figure to set the switches up with. Speedo is good and replaces the

> > original exactly. Thanks Steve


> >

> > Safe travels,


> >

> > Ralph and Charolette Fullenwider


> > "84FC35 "Ruff Diamond"


> > Duncan, Oklahoma


> >


Didn't know Stephen had speedos for sale.


If I can get one, can you help me set up mine also??










------------------------------------




Yahoo! Groups Links

[oceanshores98569]

Simple when you explain it.
Got it saved.....my Ohtsu tires turn at 491 revs.

--- In WanderlodgeForum@yahoogroups.com, "Ralph" wrote:
>
> Hi Curt:
>
> Most tire manufactures will have the diameter of their product and will
convert that to per mile revs. I run 11 R 22.5 kumoho and the spec is 502 revs
per mile. The Mich same size tire turns 501 per mile. As a for instance.
>
> We all run the magnetic pick up that counts the notches on the inside of the
break drum. The count for the notches on Birds are 60. And most of the Birds
speedometer face value is 0 to 85 mph and with the Teleflex the constant for the
0 to 85 gauge is 0.0236.
>
> So step one of finding the binary switch set up starts with
>
> 501 x 60 x 0.0236 = 710.832
> This number is the HZ rate
>
> Now we take the HZ rate number and divide it by 23.61, which is the constant
for the divide number and will give the binary number that is set up on the
program switches in the unit.
>
> 710.832 ÷ 23.61 = 30.107. Or rounded up or down to the nearest whole number
is 30 and 30 is the binary number for my system.
>
> Now we know the binary divide number and the HZ rate and that let's us program
the switches.
>
> The list for the switches is found on the following web site and is in PDF
>
>
http://www.v3instruments.com/industrial_...do_odo.pdf
>
> Safe travels, Ralph &
Charolette Fullenwider
> '84 FC35 "Ruff Diamond"
> Duncan, Oklahoma
> Sent via BlackBerry by AT&T
>
> -----Original Message-----
> From: Curt Sprenger
> Sender: WanderlodgeForum@yahoogroups.com
> Date: Fri, 26 Aug 2011 20:58:31
> To:
> Reply-To: WanderlodgeForum@yahoogroups.com
> Subject: Re: [WanderlodgeForum] Re: speedometer replacement
>
> The Michelin site shows the RPMs per tire size...don't know about the other
> tire manufactures.
>
> CurtSprenger
> 1987 PT38 8V92 "MacAttack Racing"
> Anaheim Hills, CA
> curtsprenger@...
> One of the "Birds of a Feather" (BOF) Organizers
>
>
> On Fri, Aug 26, 2011 at 8:38 PM, Ralph wrote:
>
> > **
> >
> >
> > Hi Bob
> >
> > The hardest part is going on line to the tire manufacture and find the tire
> > specs for your drive tires. Your looking for how many revolutions your drive
> > tire makes in 1 mile. The rest falls into line.
> > Safe travels, Ralph & Charolette Fullenwider
> > '84 FC35 "Ruff Diamond"
> > Duncan, Oklahoma
> > Sent via BlackBerry by AT&T
> >
> > -----Original Message-----
> > From: "oceanshores98569"
> > Sender: WanderlodgeForum@yahoogroups.com
> > Date: Sat, 27 Aug 2011 03:15:03
> > To:
> > Reply-To: WanderlodgeForum@yahoogroups.com
> > Subject: [WanderlodgeForum] Re: speedometer replacement
> >
> >
> >
> > --- In WanderlodgeForum@yahoogroups.com, "cape0001" <sbirtles@> wrote:
> > >
> > > thank you ralph
> > > I have other gauges be sure to call and make sure I Have the gauge you
> > want
> > > Stephen 97 BMC 37
> > > 888 668 4288
> > >
> > >
> > > --- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider"
> > wrote:
> > > >
> > > > There was a thread on this some time back about a speedo replacement
> > from
> > > > Stephen B. I ordered one as well and had no problem in figuring the
> > math
> > > > and programming the new speedo. What I did have a problem with was an
> > extra
> > > > wire coming from the back of the unit, one was grey and the other blue.
> > The
> > > > grey powers the hot side of the magnetic sensor, I took the blue to be
> > a
> > > > ground and was wrong about the blue, removed it out of the circuit and
> > the
> > > > speedo worked very well.
> > > >
> > > > I found some calculations on line for the programming. my tires rotate
> > 502
> > > > times per mile and that times 60 teeth on the BB drive drum times the
> > > > constant give you the ones and 10's binary switch positions and using
> > the
> > > > sum of that equation plugged into a second constant give you the hz
> > rate
> > > > figure to set the switches up with. Speedo is good and replaces the
> > > > original exactly. Thanks Steve
> > > >
> > > > Safe travels,
> > > >
> > > > Ralph and Charolette Fullenwider
> > > > "84FC35 "Ruff Diamond"
> > > > Duncan, Oklahoma
> > > >
> > Didn't know Stephen had speedos for sale.
> > If I can get one, can you help me set up mine also??
> >
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
>

[Don Bradner]

Do all Birds use wheel mounted vs transmission mounted generators?

Note that there is a math error in the top line below, but it does not affect
the rounded end result.

However, multiplying by 0.0236 and dividing by 23.61 is funtionally the same as
dividing by 1000, so
501 x 60 / 1000 = 30.06 which is close enough to the 30.047 that using .0236 and
23.61 would give.

On 8/27/2011 at 4:39 AM Ralph wrote:

>501 x 60 x 0.0236 = 710.832
>This number is the HZ rate
>
>Now we take the HZ rate number and divide it by 23.61, which is the
>constant for the divide number and will give the binary number that is set
>up on the program switches in the unit.

[Ralph L. Fullenwider]

Don:

The last magnetic pick up or Proximity switch, same thing, that I replaced
was on a '95 Bird, so I know it was there up to that year model and I do
not know about further years.

Another thing that I know, the math that I reported on to set the simple
binary switches up for the divide number and the Hertz rate worked. So why
confuse with mumbo jumbo of equation changes from a known good formula
written for the Teleflex gauge. My install and use of the programming from
the web site I published to anyone needing it, worked very well without
your change.

Safe travels,

Ralph and Charolette Fullenwider
"84FC35 "Ruff Diamond"
Duncan, Oklahoma

At 04:21 PM 8/27/2011 -0700, you wrote:
>Do all Birds use wheel mounted vs transmission mounted generators?
>
>Note that there is a math error in the top line below, but it does not
>affect the rounded end result.
>
>However, multiplying by 0.0236 and dividing by 23.61 is funtionally the
>same as dividing by 1000, so
>501 x 60 / 1000 = 30.06 which is close enough to the 30.047 that using
>.0236 and 23.61 would give.
>
>On 8/27/2011 at 4:39 AM Ralph wrote:
>
> >501 x 60 x 0.0236 = 710.832
> >This number is the HZ rate
> >
> >Now we take the HZ rate number and divide it by 23.61, which is the
> >constant for the divide number and will give the binary number that is set
> >up on the program switches in the unit.
>
>
>

[Don Bradner]

I always try to simplify formulas where possible. I suspect it was the sheer
number of decimals used that lead to your making the math error in that top line
- when you make an error that affects 5 of the 6 digits you are fortunate that
rounding got you to the right answer.

The teleflex document is of necessity a complex one, because of the many
different speedometers involved. It just happens that OUR 85MPH speedometer is
the one where the .0236 and 23.61 can be cancelled into a simple 1/1000.

Thanks for the info on the pickup - I had thought that it might be coming from
the DDEC on mine; internally my DDEC II stopped recording miles (but still has
MPH) a few years ago.

Don Bradner
90 PT40 "Blue Thunder"
My location: http://www.bbirdmaps.com/user2.cfm?user=1

On 8/27/2011 at 10:17 PM Ralph L. Fullenwider wrote:

>Don:
>
>The last magnetic pick up or Proximity switch, same thing, that I replaced
>was on a '95 Bird, so I know it was there up to that year model and I do
>not know about further years.
>
>Another thing that I know, the math that I reported on to set the simple
>binary switches up for the divide number and the Hertz rate worked. So why
>confuse with mumbo jumbo of equation changes from a known good formula
>written for the Teleflex gauge. My install and use of the programming from
>the web site I published to anyone needing it, worked very well without
>your change.
>
>Safe travels,
>
>Ralph and Charolette Fullenwider
>"84FC35 "Ruff Diamond"
>Duncan, Oklahoma
>
>At 04:21 PM 8/27/2011 -0700, you wrote:
>>Do all Birds use wheel mounted vs transmission mounted generators?
>>
>>Note that there is a math error in the top line below, but it does not
>>affect the rounded end result.
>>
>>However, multiplying by 0.0236 and dividing by 23.61 is funtionally the
>>same as dividing by 1000, so
>>501 x 60 / 1000 = 30.06 which is close enough to the 30.047 that using
>>.0236 and 23.61 would give.
>>
>>On 8/27/2011 at 4:39 AM Ralph wrote:
>>
>> >501 x 60 x 0.0236 = 710.832
>> >This number is the HZ rate
>> >
>> >Now we take the HZ rate number and divide it by 23.61, which is the
>> >constant for the divide number and will give the binary number that is
>set
>> >up on the program switches in the unit.
>>
>>
>>
>
>
>
>------------------------------------
>
>Yahoo! Groups Links
>
>
>