24

 

 

EX II 3000SP Controller Reference Guide

(0, 0)

(1023, 0) [1024, 1024]*

 

 

 

(560,(895,420)96

 

Upper Right Calibration Target

 

 

 

X = 1023 – (1024 x 1/8) = 1023 – 128 = 895

 

 

 

Y = 0 + (768 x 1/8) = 0 + 96 = 96

(128,(80, 60)671)

(0, 767) [0,0]*

[1024, 0]*

Lower Left Calibration Target

X = 0 + (1024 x 1/8) = 0 + 128 = 128

Y = 767 - (768 x 1/8) = 767 - 96 = 671

*The coordinates are in video terms, with the origin (0, 0) in the upper left corner of the screen. Examples from the controller’s perspective, however, place the origin at the lower left corner of the screen (numbers in brackets). The controller outputs 0 to 1024 on both axes independent of display screen resolution.

Calibrate Extended Procedure

To use the CX command:

1.Enter the Calibrate Extended (CX) command. The controller sends an initial acknowledgment of <SOH>0<CR>.

2.Touch the screen at a lower left target, which is located 12.5% (1/8) in from the corner of the video image. The controller returns an acknowledgment of <SOH>1<CR>. This is a positive response. If you receive a negative response <SOH>0<CR>, you must start over again.

3.Touch the screen at an upper right target, which is located 12.5% (1/8) in from the corner of the video image. The controller returns an acknowledgment of <SOH>1<CR>. This is a positive response. If you receive a negative response, you must start over again.

Touching the two valid calibration points results in a successful calibration. If either calibration point is invalid, the calibration fails. The EX II 3000SP controller restores the factory default calibration. If the Calibrate Extended failed, repeat the CX process.

Response: <SOH>1<CR> Positive response

Indicates that the controller received a valid touch coordinate (point) when the target was touched. Two valid touch points indicate a successful calibration.

<SOH>0<CR> Negative response

Indicates that the touch point is out of range of the expected target area. If you receive a negative response, you must start over again.

3M Touch Systems Proprietary Information