Well, I have changed from Navman to Tomtom and regret it so far. I have an
XL IQ (Routes edition / 340 aka XL 340

The problem I have is it shows a speed that is consistently 5km slower than
I am actually travelling. I'm sure my speedo is correct because I have
cruise control on my car and when set at a specific speed it is the same as
other traffic travelling at that speed.

The other more serious problem is that I am past the turnoffs by about
100-200 metres by the time it says to turn. Is there any way to fix these
problems or have I just bought a lemon?

Thanks folks

On Tue, 25 Aug 2009 19:00:45 +1000, "blank" <nowhere.net> wrote:

> The problem I have is it shows a speed that is consistently 5km slower than
> I am actually travelling. I'm sure my speedo is correct because I have
> cruise control on my car and when set at a specific speed it is the same as
> other traffic travelling at that speed.

Your basis for judging which speed display is wrong is misguided. All car
speedos read high while GPS is very accurate. I suggest you happily and
safely cruise control along at the speed of the prevailing traffic and not
fret that you could be going even a bit faster without getting a ticket.

Tony

Do your roads have kilometer markers set at known distances? If they do you
could always Clock your speed, set your speed @ 60 km - travel 60 km - see
if it takes 60 seconds or 1 minute to accomplish this distance.

"Anthony R. Gold" <not-for-(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> On Tue, 25 Aug 2009 19:00:45 +1000, "blank" <nowhere.net> wrote:
>
>> The problem I have is it shows a speed that is consistently 5km slower
>> than
>> I am actually travelling. I'm sure my speedo is correct because I have
>> cruise control on my car and when set at a specific speed it is the same
>> as
>> other traffic travelling at that speed.
>
> Your basis for judging which speed display is wrong is misguided. All car
> speedos read high while GPS is very accurate. I suggest you happily and
> safely cruise control along at the speed of the prevailing traffic and not
> fret that you could be going even a bit faster without getting a ticket.
>
> Tony

blank wrote:

> Well, I have changed from Navman to Tomtom and regret it so far. I have an XL IQ (Routes edition / 340 aka XL 340

> The problem I have is it shows a speed that is consistently 5km
> slower than I am actually travelling. I'm sure my speedo is correct
> because I have cruise control on my car and when set at a specific
> speed it is the same as other traffic travelling at that speed.

> The other more serious problem is that I am past the turnoffs by about 100-200 metres by the time it says to turn. Is
> there any way to fix these problems or have I just bought a lemon?

You certainly have a problem with that last, I dont get anything like that effect.

"Rod Speed" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> blank wrote:
>
>> Well, I have changed from Navman to Tomtom and regret it so far. I have
>> an XL IQ (Routes edition / 340 aka XL 340
>
>> The problem I have is it shows a speed that is consistently 5km
>> slower than I am actually travelling. I'm sure my speedo is correct
>> because I have cruise control on my car and when set at a specific
>> speed it is the same as other traffic travelling at that speed.
>
>> The other more serious problem is that I am past the turnoffs by about
>> 100-200 metres by the time it says to turn. Is there any way to fix
>> these problems or have I just bought a lemon?
>
> You certainly have a problem with that last, I dont get anything like that
> effect.
G'day Rod--you sure get around the newsgroups!! Yes, it is a pain in the
ass the whole thing. Wish I had bought a new Navman because I doubt there
is going to be a solution to either problem. I guess I'm part of the adage
that says there's a sucker born every minute. I account for one of those
minutes back in 1945.

Have you looked at the help section on the tomtom website? I found it a pain
to navigate but did get some good answers on issues I had with my Go700. If
the FAQ doesn't give you an answer, there is a link for contacting a real
person.

I'm in the USA and have speed displayed in MPH. The Go710 display matches my
car's spedo within 1mph. turn directions can sometimes be off due to the
precision of the GPS signal (whether S/A is enabled and number of
satellites locked onto). I sometimes see a position error of about 50 yards.
Not always though. I am in the habit of watching the map as I approach a
turn and not depending on the voice warning.

Hope that helped
Oppie

blank wrote:
> Well, I have changed from Navman to Tomtom and regret it so far. I have
> an XL IQ (Routes edition / 340 aka XL 340
I've used (never owned) recent model Navmans, and I'd have
to say Tomtom wipes the floor with them for ease of use.
Hence why I chose a TomTom 140 XL IQ (same as yours but
smaller screen) when I recently decided to bite the bullet
and get a standalone unit. I was previously using tomtom
software on my Palm TX PDA.
>
> The problem I have is it shows a speed that is consistently 5km slower
> than I am actually travelling. I'm sure my speedo is correct because I
> have cruise control on my car and when set at a specific speed it is the
> same as other traffic travelling at that speed.
Assuming the GPSr is working properly, you can put more
faith in the GPS speed than in your car speedo, unless you
are travelling on a very steep hill or around a tight curve.
>
> The other more serious problem is that I am past the turnoffs by about
> 100-200 metres by the time it says to turn. Is there any way to fix
> these problems or have I just bought a lemon?
When I was running tomtom on my palm it would occasionally
do this if I had a big POI file loaded. The same big POI
file has no problems on the 140.
If I were you I'd probably first try turning off map display
of some of your poi's. If that doesn't work try reloading
the software on your unit (using tomtom home software and
instructions on tomtom website).
If still no go then I'd suggest taking your tomtom back to
where you bought it and get it swapped over.
>
> Thanks folks
>

"blank" <nowhere.net> wrote in message
news:001d2bb4$0$2883$(E-Mail Removed)...
> Well, I have changed from Navman to Tomtom and regret it so far. I
> have an XL IQ (Routes edition / 340 aka XL 340
>
> The problem I have is it shows a speed that is consistently 5km
> slower than I am actually travelling. I'm sure my speedo is correct
> because I have cruise control on my car and when set at a specific
> speed it is the same as other traffic travelling at that speed.
>
> The other more serious problem is that I am past the turnoffs by
> about 100-200 metres by the time it says to turn. Is there any way
> to fix these problems or have I just bought a lemon?
>

Got to be honest & say I trust the speed shown by the TomTom more than
the speedo and as for the late directions, only in the first mile or
so but then again I have road names enabled on mine & so can 'count
down to the turning. Using a Go920.

blank wrote
> Rod Speed <(E-Mail Removed)> wrote
>> blank wrote

>>> Well, I have changed from Navman to Tomtom and regret it so far. I have an XL IQ (Routes edition / 340 aka XL 340

>>> The problem I have is it shows a speed that is consistently 5km
>>> slower than I am actually travelling. I'm sure my speedo is correct
>>> because I have cruise control on my car and when set at a specific
>>> speed it is the same as other traffic travelling at that speed.

>>> The other more serious problem is that I am past the turnoffs by
>>> about 100-200 metres by the time it says to turn. Is there any way
>>> to fix these problems or have I just bought a lemon?

>> You certainly have a problem with that last, I dont get anything like that effect.

> G'day Rod--you sure get around the newsgroups!!

I do indeed.

> Yes, it is a pain in the ass the whole thing.

> Wish I had bought a new Navman because I doubt there is going to be a solution to either problem.

Corse there is with the last one, none one of the tomtoms I have used has ever had that problem.

I do vaguely recall someone else having a similar problem, where
the location was out by that sort of amount, consistently and I do
recall that it was trivialy fixable. Cant remember where I saw that tho,
it may well have been on the austech site, bit hard to search for tho.

TomTom is guaranteed to be able to fix it.

> I guess I'm part of the adage that says there's a sucker born every minute. I account for one of those minutes back
> in 1945.

You arent a sucker, just the usual bad luck with something trivially fixable.

Doug Jewell wrote
> blank wrote

>> Well, I have changed from Navman to Tomtom and regret it so far. I have an XL IQ (Routes edition / 340 aka XL 340

> I've used (never owned) recent model Navmans, and I'd have
> to say Tomtom wipes the floor with them for ease of use.

Yeah, me too. I actually borrowed one of each when I first was
buying a GPS and found the same thing. And the Choice comment
that the TomTom did better in the CBDs and tunnels was the clincher.

> Hence why I chose a TomTom 140 XL IQ (same as yours but smaller screen) when I recently decided to bite the bullet
> and get a standalone unit. I was previously using tomtom
> software on my Palm TX PDA.

I got a 710

>> The problem I have is it shows a speed that is consistently 5km
>> slower than I am actually travelling. I'm sure my speedo is correct
>> because I have cruise control on my car and when set at a specific
>> speed it is the same as other traffic travelling at that speed.

> Assuming the GPSr is working properly, you can put more
> faith in the GPS speed than in your car speedo, unless you
> are travelling on a very steep hill or around a tight curve.

Likely whatever is getting the position wrong with
interesections is also affecting the GPS speed.

>> The other more serious problem is that I am past the turnoffs by
>> about 100-200 metres by the time it says to turn. Is there any way
>> to fix these problems or have I just bought a lemon?

> When I was running tomtom on my palm it would occasionally
> do this if I had a big POI file loaded. The same big POI
> file has no problems on the 140.

> If I were you I'd probably first try turning off map display
> of some of your poi's. If that doesn't work try reloading
> the software on your unit (using tomtom home software and instructions on tomtom website).

I do recall someone saying that they were getting their GPS
showing an offset from the road they were on, all the time.
Pretty sure an update fixed it. Bit hard to search for and I
cant even recall where I saw it, likely the austech site.

> If still no go then I'd suggest taking your tomtom back to where you bought it and get it swapped over.