Thread: TT Touchscreen calibration

TT Touchscreen calibration
Method valid for up to 8,051 NavCore versions .

A manual method for correcting the calibration of the touchscreen any TomTom is to create a file called calib.txt ( for example, Notepad ) and save it in the root directory of the TomTom memory disk (eg , the SD card, the same directory of file ttsystem ) .

calib.txt should include a line with four numbers separated by a space : X Max- Min- Max Min-Y X -Y

Note that the 'X' in the sequence ( max , min) is inverted 'Y' sequence ( min , max ) . Max- X > X and Min- Min -Y
For example , the file may include :
928 118 107 912

TomTom Each device has its own most appropriate sequence.

To compile the file with default data , a method might be to perform a reset of TomTom ( remove the SD card) , the device turns on and holding the power button for a few seconds until the black screen the drive appears . Called line . " Touchscreen calib data " consist of four numbers in the sequence represents Min- Max X - Max Min-Y X -Y , these numbers can be used to fill the line configuration calib.txt remembering to change the first two . For example, if the black screen of the unit returns 118 928 107 912 , calib.txt must be saved 928 118 107 912.

Tuning then you can do by adjusting the numbers until the touch screen is calibrated. Distortions such as screen rotation , correcting trapezium and rhombus can not be achieved with this method, even if the symphony of these parameters may provide an acceptable touch screen management , even in the presence of distortions , the best screen to adjust the calibration is to exploit the onscreen keyboard NavCore application.

For example , on my old TomTom GO Classic device I realized that , after activating the keyboard NavCore screen when moving vertically (Y axis) the cursor calibrated appeared , while the horizontal motion (X axis) prevented the management right columns (especially in the position of the lower left corner ) and left key . So I went to the last two digits and unaltered , after some testing , I have successfully used the following values: 805 200 107 912 .

Method applies to later versions NavCore 8,051 .

For version 8.3x 8.2xy NavCore , to use the same method as mentioned above , with these minor differences :
the file must be named cal.txt (not calib.txt ) and again should be placed in the root directory of the SD (or HD) TomTom drive system (eg , the same directory where you can find ttsystem ) . In addition , the four numbers in the file must have a different sequence than previously described for versions up to 8.51 ; cal.txt shall include the following sequence: X Max- Min- Max X -Y Min -Y (note that also precedes Max Min -Y -Y) .

For example , cal.txt may include the following four digits : 928118912107

Again, these numbers are specific to each TomTom unit.

For example, my TomTom GO 630 works fine with 931 83 475 65 921 when the original was 83,856,142 .

Text translated from " mytomtom.co.uk " User Bart

To try to stop this clearer text included pikardaken user.

To begin we must know the calibration values ​​is our default browser. To do this we have to do a reset ( img. 1) introducing, for example, a clip, a few seconds is sufficient. Then turn on the device and hold the button until we display hardware information ( img. 2) appears.

We signed the data.
In my case it is " 83 921 142 856 " .

To work with these we have to change the order of groups of figures. We changed the first on the second and third on the fourth .
In my case is " 921 83 856 142 " .




Now we know what those values ​​mean. The first 2 values ​​are related to the calibration of center left and center right respectively. The last two values ​​refer to the calibration center to center up and down, also respectively.
To work in the tutorial we will change the values ​​of letters.
921 = X (vector to left)
83 = Y (vector to right)
856= V (up vector)
142 = W (vector down)



That means that when the problem is in the press center at the top we have to modify the " V " value center down the " W " value from center to right the value " Y" and the center left value " X " .

With that in mind , now let's try to calibrate the screen.
Whenever we can , we try to calibrate taking references on the menu for the fact that we have 8 buttons.
Suppose , as in my case , pressing the button "Go to ... " , which is the center to top, always marks that we are pressing the " Mobile Phone " button. In this case we have bad calibration center to top and we change the " V " . As always pressing us to mark down more of what we choose , we must reduce the value.
My default value was " 856 " and now, after calibration has stayed in " 475 " .
With the rest of the axes is the same.

Keep in mind the following:

Always press on the same site , at center above: " V " =
Reduce the " V " value means that the screen move down.
Upload the " V " value means that the screen move upward.


Always press on the same site , the center to bottom: " W " =
Reduce the " W " value means that the screen move down.
Raise the " W " value means that the screen move upward.


Always press on the same site , center left , " X " =
Reduce "X " value means that the display move to the right .
Top "X " value means that the screen move left.


Always press on the same site , the center right : "Y" =
Reduce "Y" value means move the screen to the right.
Upload "Y" value means that the screen move left.


When you create the calibration file , we will consider the following:


The file " cal.txt " will be called .
Only contain the coordinates of calibration.
The file we will put in the root directory of the internal memory or card browser if card ..





My original calibration was " 921 83856142 " and ended up being " 931 83 475 65" . As you can see the " V " values ​​and " W " have been changed to more or less half the original . By that I mean do not be afraid to significantly modify the values ​​need not be changed from 10 to 10 as I've seen in other tutorials (to call it somehow) .
To refine the calibration , a good place , we will in the main screen , as in the upper corners are buttons to enlarge and reduce the map .



You must take into account that the values ​​are 4 and who work with screen quadrant is as if your gps had four small screens together and each quadrant will affect two vectors.


Credits Orni