BenQ PointWrite PT20 - Page 20

Alignment Instructions20
2. Adjustment for optimal height of Touch Module Laser Curtain
The alignment masks help you to find the optimal height of the laser curtain
and optimal touch performance.
• Using the Alignment Mark
Mounting Position of Alignment Mark
In the camera view of PointWrite, The alignment mark reflector is shown like
below picture.
The number of bright spots reflected on the mask represents the height of
the laser curtain:
Lower reflector
Higher reflector
5mm
5mm
Mask 2 Mask 1
Mask 3Mask 4
Reflection of
mask 4
Reflection of
mask 2
Reflection of
mask 3
Reflection of
mask 1
Ceiling Mounting
Reflected Points on
the Mask
Height of Laser
Curtain
1 point 5 - 10 mm
2 points < 5 mm
3 points Around 5 mm
Height of Laser
Curtain