Calibrating a NextWindow USB Touch Screen

The calibration procedure is similar on all of NextWindow's USB touch screens. The illustrations below show the 2700 Touch Overlay model.

(Note: Touch screens with serial communications require a different calibration procedure. Refer to the manual that comes with the product.)

Calibration Procedure

With a clear desktop on the computer:

Press [Scroll Lock] on the computer keyboard six times,
Or
Use a ballpoint pen or similar to press the hardware calibration button (not available on all models) until the touch screen beeps.

• The mouse pointer automatically moves to a position at the top left of the screen.
• Touch and hold your finger (or stylus) on the screen at that position until you hear a long beep.
• The pointer moves to three further positions in sequence—top right, bottom right and bottom left. Touch each point in turn until you hear the beep. This completes the USB calibration procedure.

Test the calibration by moving your finger around the screen checking that the cursor closely follows it. If the calibration is not satisfactory, you can re-calibrate.

Calibration Notes

• When removing your finger, lift it straight off the screen, making sure you don’t drag it across the screen.
• You can exit calibration mode by pressing the calibrate button again or by pressing the [Scroll Lock] key twice.
• The default calibration key on a Microsoft Windows keyboard is [Scroll Lock]. This can be changed to a different key if required using NextWindow's USB Config program, which you can download from the NextWindow Software page.
• You cannot use a keyboard key to initiate calibration on a Linux or Mac OS X touch screen application because these operating systems do not support USB keyboard synchronisation. For those systems, use the hardware calibration button on the touch screen. NextWindow also provide a software utility program to initiate calibration on an Apple Mac computer.