Tom Tom settings

Hi Willie,

So am I reading right and understanding you, that it isn’t that its out by a set few K's. It varies over 4 or 5 k area?

You cannot recalibrate a GPS.
It calculates its speed reading on the difference between each position every second or 2, depending on how many channels (satelites ) it monitors.
First I would be looking at where you are getting your "correct" speed from?
Also it is important to understand that a GPS lags slightly behind your actual speed when accelerating.
for example
Lets say your GPS updates each second (for simplicity) and your GPS calculates speed by how far you travel in 1 second. At 100kph you are doing 27 meters a second, and if you are doing a steady speed it is absolutely accurate BUT if you are accelerating heavily you may(for example) be doing 90kph and 27 meters further be doing 110kph before it can tell you that your average speed between those points was 100kph

Willem,
I'd take it back and get a replacement.....
I have a Tom Tom One and haven't had this problem. Perhaps there us a fault with it.

Cheers

Brian

Willem
Only a thought though,, but I am wondering if the GPS can get enuf satelites to guarantee accuracy. Could be a problem with some of the more basic models.

I know with my little old Etrek Legend, things go a little inaccurate when it can't get enuf satelites to use in its reference.

Cheers

Bucky

Willem,

I have a Go 720 and there is nowhere I can find to change speed alert settings.

Mine is automatic in that whatever the posted speed limit that is set for the section of road you are on, the speed alert sounds as soon as that limit is exceeded.
Obviously relies on the accuracy of the information collected for the map version used and would not take into account temporary or permanent changes that occur from time to time.

Is a good indication of speed limits and safety/speed camera locations, but I wouldn't rely on it completely.

try here for an answer to your problem.

tomtom

If no luck, try reloading the info onto the sd card or better still onto another sd card. What version of the maps are installed? I have same tomtom and just been thru plenty of distress one week out of warranty. In the end after being told where to go, I sorted my problem myself by reloading all onto a new sd card. The latest update version of the maps i was given from tomtom actually caused my tomtom one unit to freeze (apart from other things) every time it was turned on. It took one of those rare moments when the unit would turn on to trial and error methods to fix it and i found that it was due to the actual tomtom sd card being corrupted by the latest version when updated from the disc supplied by tomtom.

OR TRY POSTING THE QUERY ON:

MTekk GPS forum

Good luck

Hi Willem,

I don't know about the Tom Tom but my Accura has both a km/h variable and a percentage variable. Both can be set over and under and can be from the mapped zone limit or a preset max. The alert goes off the instant the set limit is reached. These settings are located under an advanced personal config menu.

Whilst the Accura isn't the best (apparently) it is very handy with it's 7" screen and easy to use screen buttons.

I used a Navman 50 the other day and was very put off by the amount of screen tapping required and backtracking through menus. This Navman seemed to not have the speed alerting but it could also have been that it was too complex to find. Also the trips seemed difficult to edit whereas the Accura is a simple method of :_ Route/edit then add or subtract any location or artifact (like u-turns or roundabouts)

I use the speed alert a lot to keep me in check.

Cheers Cam

Hi I have a Tom Tom one v3, and use the speed warning all the time , with mine ( set on 50 ) , it goes off at about 52/53 and if you keep going over that speed , at about 56 it does not keep going which is good and once you have slowed down to under 50( next town) it will sound again as you speed up over 50. I really appreciate the red light warnings with the speed limit for the intersection, just spent 4 days in adelaide and was muchly appreciated.I have been using it for a couple of months and find it to be consistant.
They are a basic unit but I find it very easy to use & reliable, just wish it had a card slot to load other maps .
The best thing is how happy the wife is for not getting told off for having the book upside down. she thinks it is the best thing I have got .
But if you want more you pay more.
Cheers Des.