en Description B Color line sensor FE 5002

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Color line sensor FE 5002 B Page 20 Sensor scan 3.6. >bl dsp comp. mode .4.3. >dl dsp comp. mode .4.9. >c dsp comp. mode The brightness edge evaluation provides additional barring against similar lines and contrasting edges. During the edge evaluation, the brightness jump between the edge of the guiding criterion and the background is evaluated. By means of the edge evaluation, in certain cases jumping to another guiding criterion with similar properties may be avoided, e.g. label scanning. Example: If a light guiding criterion is scanned on a dark background, the camera scan is as illustrated in the figure opposite. Only the broken area is relevant for the edge evaluation. The jump has a positive pre-sign. If the jump goes into the negative (dark guiding criterion ) the color line sensor will output "Guiding criterion lost" when the edge evaluation is active, parameter 18 indicates value 5. Parameter value 0 = edge evaluation ON (Default) Parameter value 1 = edge evaluation OFF In the case of greatly fluctuating backgrounds and an average brightness, the brightness edge evaluation may have to be switched off. .3.3. bl width tolerance .4.0. dl width tolerance If the line is subject to certain width fluctuations, this parameter value maybe used to set a tolerance of up to which line width the guiding criterion may still be detected. Entries may be infinite from 1% to 100 % . Example: When 25 % has been entered and the taught line width is 2 mm, the line width may vary from a minimum of 1.5 mm to a maximum of 2.5 mm. Outside this range the color line sensor outputs that the "Guiding criterion is lost", parameter 18 indicates value 3. In "Contrasting edge" mode this parameter has no function. .3.4. bl bright tolerance .4.1. dl bright tolerance .4.7. c bright tolerance If the line is subject to certain brightness fluctuations, this parameter value may be used to set a tolerance of up to which degree of brightness the guiding criterion may still be detected. In the case of lines, the brightness tolerance applies to the average brightness on the line.
Average brightness values of the taught line: Red 180, Blue 174, Green 153 Average brightness values of the taught edge at the brighter side: Red 205, Blue 191, Green 164 Red 103, Blue 106, Green 124 Average brightness values of the taught edge at the dark side Color line sensor FE 5002 This tolerance should be selected as high as possible (>60 %). Values less than 40 are not permissible! Example: The sum of the three color scans (red, green, blue), of the taught line corresponds to 100 %. In this example 507 brightness values (red 180 + blue 174 + green 153). If a tolerance range of 60 % is now set, the sum of the brightness values may vary within a range of 202 (-60 %) to 811 (+60 %) brightness values. In the case of contrasting edges the area to the left and right of the contrasting edge is taken to determine the brightness. At the brighter side (higher brightness value) what is termed the minimum brightness is spoken of and at the darker side, of the maximum brightness. The tolerance must be determined individually for both brightness values. Example: 60 % is set as the tolerance range. Minimum brightness = (sum of the brightness values of the taught edge ) - (X % of the sum of the brightness values of the taught edge) Minimum brightness = (205+191+164) - ((205+191+164)/100*60) Minimum brightness = 224 The sum of the brightness values on the brighter side must not exceed the value of 224. Maximum brightness= (sum of the brightness values of the taught edge ) + (X% of the sum of the brightness values of the taught edge) Maximum brightness = (103+106+124) + ((103+106+124)/100*60) Maximum brightness = 532,8 The sum of the brightness values on the dark side must not exceed the value of 532,8. If the tolerance (line or contrasting edge) is exceeded or not reached, the color line sensor will output "Guiding criterion lost", parameter 18 indicates value 4. B Page 21
Page 1 and 2: Description B Color line sensor FE
Page 3 and 4: Guiding criteria Line Line Web edge
Page 5 and 6: 2.6 Operating modes t i t p 2.6.1 L
Page 7 and 8: 3.1 General mounting instructions S
Page 9 and 10: Poor sharpness (few LEDs) LEDs 7+ 8
Page 11 and 12: 5.2 Teaching the guiding criterion
Page 13 and 14: 5.2.3 Combined teaching 5.3 Operati
Page 15 and 16: No. Name Default Min Max Unit Descr
Page 17 and 18: No. Name Default Min Max Unit Descr
Page 19: 6.2 Optimising and setting specific
Page 23 and 24: Colour values of the taught edge on
Page 25 and 26: 8. Spare parts Color line sensor FE
Page 27 and 28: Brief description for manual learni

en Description B Color line sensor FE 5002

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