Speedometer programming

[Don Bradner]

The speedometer on 90 PT40 reads roughly 15-20% high. Presumably racks up miles
at a higher rate as well.

The VMSpc speed reading appears to be just about dead on; I would like to
improve the accuracy of the speedometer, and I wondered if anyone here has any
info on the programming?

On the back are 12 dip switches. 1-4 are labled "Ones" and 1, 2, 4, 8. 5-8 ae
labled "Tens" and 10, 20, 40, 80. 9-12 are labeled "Filter."

Only 2 and 4 are on (values 2 and 8).

This is an obvious question for Bluebird tech support, but so far on other
issues I'm batting .000 with them (meaning I have yet to talk to a human) so I
thought I would ask on the forums first in case someone has previously received
programming info.

Don Bradner
90 PT40 "Blue Thunder"

[one_dusty_hoot]

Don, I believe the dip swiches are set to a ratio that
is the calculation diameters, circumferences, or teeth.

For instance, if the pick up was from a toothed wheel
hub, it may be the resultant ratio of distance, wheel
circumference,and time.

I have seen such calculations before but can't remember
where except that it was from a gauge supplier, Telefex,
Stewart Warner, etc. Check the Mfgr for instructions.

Another possibility is the distance (gap)between the tooth
and reluctance pick up but usually would count lower not
higher, 15-20% is way off, may be the counting circuit in
the speedo?
Best I can do for what little I know.

bob janes, 87fc35, greenville, sc






--- In WanderlodgeForum@yahoogroups.com, "Don Bradner"
wrote:
>
> The speedometer on 90 PT40 reads roughly 15-20% high. Presumably
racks up miles at a higher rate as well.
>
> The VMSpc speed reading appears to be just about dead on; I would
like to improve the accuracy of the speedometer, and I wondered if
anyone here has any info on the programming?
>
> On the back are 12 dip switches. 1-4 are labled "Ones" and 1, 2, 4,
8. 5-8 ae labled "Tens" and 10, 20, 40, 80. 9-12 are labeled "Filter."
>
> Only 2 and 4 are on (values 2 and 8).
>
> This is an obvious question for Bluebird tech support, but so far
on other issues I'm batting .000 with them (meaning I have yet to
talk to a human) so I thought I would ask on the forums first in case
someone has previously received programming info.
>
> Don Bradner
> 90 PT40 "Blue Thunder"
>

[Don Bradner]

I'm guessing that it gets a lot more complicated than specific ratios, and it is
necessary to have the specific settings. The engine/transmission are both
electronic, and putting out digital data. There is a separate box containing a
circuit board, attached to the "Cal" hole in the back of the Speedo, and the dip
switch settings have to match what the Cal module is providing. I'm hoping
someone here has had occasion to obtain the settings for a circa '90 8V92/HT755
combo, so that I could try something different. 256 possible combinations for
those 8 switches...

On 2/4/2007 at 11:28 PM one_dusty_hoot wrote:

>Don, I believe the dip swiches are set to a ratio that
>is the calculation diameters, circumferences, or teeth.

Don Bradner
90 PT40 "Blue Thunder"

[Gregory OConnor]

I dont think the dips are adjustable to do a fine tune???? You may be
able to find settings that will fool the speedo to read closer to
actual but factory set for components installed. I think Bob has a
good point that there must be a input fault if the dip setting you
now have proves to be factory correct?????
GregoryO'Connor
94ptRomolandCa

--- In WanderlodgeForum@yahoogroups.com, "Don Bradner"
wrote:
>
> I'm guessing that it gets a lot more complicated than specific
ratios, and it is necessary to have the specific settings. The
engine/transmission are both electronic, and putting out digital
data. There is a separate box containing a circuit board, attached to
the "Cal" hole in the back of the Speedo, and the dip switch settings
have to match what the Cal module is providing. I'm hoping someone
here has had occasion to obtain the settings for a circa '90
8V92/HT755 combo, so that I could try something different. 256
possible combinations for those 8 switches...
>
> On 2/4/2007 at 11:28 PM one_dusty_hoot wrote:
>
> >Don, I believe the dip swiches are set to a ratio that
> >is the calculation diameters, circumferences, or teeth.
>
> Don Bradner
> 90 PT40 "Blue Thunder"
>

[Pete Masterson]

I've had auto speedometers that were rather off ... a speedometer
shop was able to make a quick fix for not a lot of $$. You might look
for one that can handle a bus...

Based on those radar-speed signs, the speedo on my coach seems to be
reasonably accurate.

With 256 possible settings, you will be kept busy for some time to
come...

Pete Masterson
aeonix1@...
'95 Blue Bird Wanderlodge WBDA 42'
El Sobrante, CA




On Feb 4, 2007, at 4:51 PM, Gregory OConnor wrote:

> I dont think the dips are adjustable to do a fine tune???? You may be
> able to find settings that will fool the speedo to read closer to
> actual but factory set for components installed. I think Bob has a
> good point that there must be a input fault if the dip setting you
> now have proves to be factory correct?????
> GregoryO'Connor
> 94ptRomolandCa
>
> --- In WanderlodgeForum@yahoogroups.com, "Don Bradner"
> wrote:
>>
>> I'm guessing that it gets a lot more complicated than specific
> ratios, and it is necessary to have the specific settings. The
> engine/transmission are both electronic, and putting out digital
> data. There is a separate box containing a circuit board, attached to
> the "Cal" hole in the back of the Speedo, and the dip switch settings
> have to match what the Cal module is providing. I'm hoping someone
> here has had occasion to obtain the settings for a circa '90
> 8V92/HT755 combo, so that I could try something different. 256
> possible combinations for those 8 switches...
>>
>> On 2/4/2007 at 11:28 PM one_dusty_hoot wrote:
>>
>>> Don, I believe the dip swiches are set to a ratio that
>>> is the calculation diameters, circumferences, or teeth.
>>
>> Don Bradner
>> 90 PT40 "Blue Thunder"
>>



[Non-text portions of this message have been removed]

[Leroy Eckert]

I haven't noticed the variance on mine. I have checked it with those roadside
radar detectors that are every 20 miles down here, if you can believe those, and
it appears to be very close. It will be interesting to see the speed on my
VMSpc when I get it going.

If you want I will look and see how my switches are set. Otherwise, I am no
help.

Leroy Eckert
1990 WB-40"Smoke N Mirrors"
Niceville, FL





----- Original Message -----
From: Don Bradner
To: wanderlodgeforum@yahoogroups.com
Sent: Sunday, February 04, 2007 4:45 PM
Subject: [WanderlodgeForum] Speedometer programming


The speedometer on 90 PT40 reads roughly 15-20% high. Presumably racks up
miles at a higher rate as well.

The VMSpc speed reading appears to be just about dead on; I would like to
improve the accuracy of the speedometer, and I wondered if anyone here has any
info on the programming?

On the back are 12 dip switches. 1-4 are labled "Ones" and 1, 2, 4, 8. 5-8 ae
labled "Tens" and 10, 20, 40, 80. 9-12 are labeled "Filter."

Only 2 and 4 are on (values 2 and 8).

This is an obvious question for Bluebird tech support, but so far on other
issues I'm batting .000 with them (meaning I have yet to talk to a human) so I
thought I would ask on the forums first in case someone has previously received
programming info.

Don Bradner
90 PT40 "Blue Thunder"





[Non-text portions of this message have been removed]

[Don Bradner]

It would be great if you could take a look - it is likely that ours should be
the same.

When I drove it out of Phoenix last month I knew it didn't feel right for the
indicated speed, so I set it at 60 on the cruise and used the stopwatch to time
a mile, then several more miles (using the ubiquitous mile markers on I-10). I
was running above 70 seconds per mile, and the truck traffic was blowing around
me. When I drove yesterday with VMSpc running, it was showing 35 when the
speedometer was above 45.

On 2/4/2007 at 7:18 PM Leroy Eckert wrote:

>I haven't noticed the variance on mine. I have checked it with those
>roadside radar detectors that are every 20 miles down here, if you can
>believe those, and it appears to be very close. It will be interesting to
>see the speed on my VMSpc when I get it going.
>
>If you want I will look and see how my switches are set. Otherwise, I am
>no help.

Don Bradner
http://www.arcatapet.net

[Leroy Eckert]

Give me a couple days and I will do that.

Leroy Eckert
1990 WB-40"Smoke N Mirrors"
Niceville, FL



----- Original Message -----
From: Don Bradner
To: WanderlodgeForum@yahoogroups.com
Sent: Sunday, February 04, 2007 10:51 PM
Subject: Re: [WanderlodgeForum] Speedometer programming


It would be great if you could take a look - it is likely that ours should be
the same.

When I drove it out of Phoenix last month I knew it didn't feel right for the
indicated speed, so I set it at 60 on the cruise and used the stopwatch to time
a mile, then several more miles (using the ubiquitous mile markers on I-10). I
was running above 70 seconds per mile, and the truck traffic was blowing around
me. When I drove yesterday with VMSpc running, it was showing 35 when the
speedometer was above 45.

On 2/4/2007 at 7:18 PM Leroy Eckert wrote:

>I haven't noticed the variance on mine. I have checked it with those
>roadside radar detectors that are every 20 miles down here, if you can
>believe those, and it appears to be very close. It will be interesting to
>see the speed on my VMSpc when I get it going.
>
>If you want I will look and see how my switches are set. Otherwise, I am
>no help.

Don Bradner
http://www.arcatapet.net





[Non-text portions of this message have been removed]

[Lawrence Thornell]

Contact the mfg of the speedo for a correction formula to reset the dips. A
rather easy fix.
LT 90 SP in Eclectic, AL
----- Original Message -----
From: "Gregory OConnor"
To:
Sent: Sunday, February 04, 2007 6:51 PM
Subject: [WanderlodgeForum] Re: Speedometer programming


>I dont think the dips are adjustable to do a fine tune???? You may be
> able to find settings that will fool the speedo to read closer to
> actual but factory set for components installed. I think Bob has a
> good point that there must be a input fault if the dip setting you
> now have proves to be factory correct?????
> GregoryO'Connor
> 94ptRomolandCa
>
> --- In WanderlodgeForum@yahoogroups.com, "Don Bradner"
> wrote:
>>
>> I'm guessing that it gets a lot more complicated than specific
> ratios, and it is necessary to have the specific settings. The
> engine/transmission are both electronic, and putting out digital
> data. There is a separate box containing a circuit board, attached to
> the "Cal" hole in the back of the Speedo, and the dip switch settings
> have to match what the Cal module is providing. I'm hoping someone
> here has had occasion to obtain the settings for a circa '90
> 8V92/HT755 combo, so that I could try something different. 256
> possible combinations for those 8 switches...
>>
>> On 2/4/2007 at 11:28 PM one_dusty_hoot wrote:
>>
>> >Don, I believe the dip swiches are set to a ratio that
>> >is the calculation diameters, circumferences, or teeth.
>>
>> Don Bradner
>> 90 PT40 "Blue Thunder"
>>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>

[Leroy Eckert]

Don:
My dip switches are 2, 3, and 6 on.

Leroy Eckert
1990 WB-40"Smoke N Mirrors"
Niceville, FL




----- Original Message -----
From: Don Bradner
To: WanderlodgeForum@yahoogroups.com
Sent: Sunday, February 04, 2007 10:51 PM
Subject: Re: [WanderlodgeForum] Speedometer programming


It would be great if you could take a look - it is likely that ours should be
the same.

When I drove it out of Phoenix last month I knew it didn't feel right for the
indicated speed, so I set it at 60 on the cruise and used the stopwatch to time
a mile, then several more miles (using the ubiquitous mile markers on I-10). I
was running above 70 seconds per mile, and the truck traffic was blowing around
me. When I drove yesterday with VMSpc running, it was showing 35 when the
speedometer was above 45.

On 2/4/2007 at 7:18 PM Leroy Eckert wrote:

>I haven't noticed the variance on mine. I have checked it with those
>roadside radar detectors that are every 20 miles down here, if you can
>believe those, and it appears to be very close. It will be interesting to
>see the speed on my VMSpc when I get it going.
>
>If you want I will look and see how my switches are set. Otherwise, I am
>no help.

Don Bradner
http://www.arcatapet.net





[Non-text portions of this message have been removed]