Vmarker pen II, Manual

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5.2 The calibration process of the Vmarker sensor fails
When the calibration of the Vmarker sensor fails, or is very hard to complete successfully,
there may be several reasons:
5.2.1 The Vmarker sensor still has old firmware
De Vmarker sensor continuously is being improved. Also the calibration process is
possibly improved in a later firmware version. You can download the latest firmware
version of the Vmarker sensor from the website:
http://www.vmarker.org .
5.2.2 A particular corner is not accepted and gives problems
Possible causes are:
•
Be sure there is nothing between the IR-LED of the IR-pen and the Vmarker sensor,
•
Not all corners of the projected image are within the range of the Vmarker sensor,
you can check this with use of the VmarkerUtility software.
•
The angle of the IR-pen to the projection surface is not good, try to adjust the angle
of the IR-pen to the surface. This can be a problem when a high gloss projection
surface is used.
•
The IR-dot is larger then 50, increase the distance of the Vmarker sensor towards
the projected image. (You can check size with the VmarkerUtility software.)
•
The IR-pen is not working properly see also 5.5
•
You can make the sensor more sensitive by selecting a preset with a higher
number.
5.2.3 The calibration process seems to skip points
When calibrating, points are skipped. Or the Vmarker sensor seams to calibrate it self
without using the IR-pen. This causes the calibration to fail.
Possible causes are:
•
Besure you only press the button or the tip of the IR-pen only to mark the corner.
•
There is another IR-source in the range of the Vmarker sensor, see 5.4
•
The Vmarker sensor still has old firmware, see 5.2.1
•
You can make the sensor less sensitive selecting a preset with a lower number.
Vmarker Interactive Whiteboard 27