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Overview, 7 gain setting – Banner EZ-ARRAY USB Serial Adapter User Manual

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P/N 126701

Banner Engineering Corp.

Minneapolis, U.S.A.

www.bannerengineering.com • Tel: 763.544.3164

A-GAGE EZ-ARRAY

QuickStart Guide

Overview

Single-edge scan is used for single, solid objects that block the

first beam. The receiver always checks the beam closest to the

display first, and only if that beam is blocked does the binary

search continue. Therefore, single-edge scan will not work in

instances where the item to be measured does not block the first

beam. Single-edge scan is also ineffective if the object does not

present a continuous blocked pattern.
Single-edge scan will work only when the high-excess-gain

setting is enabled. When single-edge scan is selected, the

sensor object detection size will be 10 mm and edge resolution

will be 2.5 mm.
Double-Edge Scan is used to detect two edges of a single

object, for example, to determine box width measurements.

Double-edge scan requires the selection of a step size: 1, 2,

4, 8, 16 or 32 beams. The sensor uses the steps to “skip” over

beams.
Double-edge scan works as follows:
1. The sensor activates beam 1 (the beam closest to the sensor

display end).

2. The sensor activates the next beam, determined by the step

size. (For example, if the step size is 2, beam 3 is next; if the

step size is 8, beam 9 is next.)

3. As long as the activated beam is unblocked (or “made”), the

sensor will continue the stepping routine until a blocked beam

is found.

4. When a blocked beam is found, a binary search is conducted

to find the object’s “bottom edge.”

5. When the bottom edge is found, the sensor begins “stepping”

again through the array until the sensor finds the next

unblocked beam.

6. A binary search is again performed to find the second edge.
Similar to single-edge scan, double-edge scan has some

restrictions: the object should provide a solid obstruction; the

size of the object will determine the maximum step size (Figure

1-5). Double-edge scan can be used to detect up to three

objects. Like single-edge scan, double-edge scan will work only

when the high-excess-gain setting is selected. When double-

edge scan is selected, the sensor object detection size will vary

depending on the step size, but edge resolution will be 2.5 mm.
Sensor response time is a function of sensor length and

scanning method. Maximum scan times are shown in Figure 1-7.

1.7 Gain Setting

The EZ-ARRAY provides two gain options: high excess gain

and low contrast. The gain option can be selected using the

push button on the receiver interface, the receiver remote teach

wire, or the software GUI, and is available for straight scan

applications only.
High (maximized) excess gain is best suited for detecting

opaque objects and to provide reliable sensing in dirtier

environments where objects to be detected are 10 mm or larger.
The low-contrast setting is excellent for sensing semi-transparent

materials and for detecting objects as small as 5 mm.
When using the GUI, low-contrast sensing allows a fine-tune

sensitivity setting of 15% to 50%. When using the receiver

interface, low-contrast sensitivity is always 30%. The push button

may be disabled, using the GUI.

Maximum Scan Times (in milliseconds)

Array Length

Straight

Scan

Single-Edge

Scan

Double-Edge Scan

Step

1 Beam

Step

2 Beams

Step

4 Beams

Step

8 Beams

Step

16 Beams

Step

32 Beams

150 mm (5.9")

2.8

1.5

3.4

2.8

2.5

2.4

1.9

N/A

300 mm (11.8")

5.0

1.5

5.9

4.1

3.2

2.8

2.3

2.1

450 mm (17.7")

7.1

1.6

8.5

5.5

4.2

4.0

3.2

2.5

600 mm (23.6")

9.3

1.6

11.0

6.8

4.9

4.2

4.0

2.8

750 mm (29.5")

11.4

1.7

13.5

8.1

5.7

4.6

4.5

4.5

900 mm (35.4")

13.6

1.7

16.0

9.5

6.1

4.7

4.6

4.6

1050 mm (41.3")

15.7

1.8

18.6

10.8

6.8

5.2

4.8

4.8

1200 mm (47.2")

17.9

1.8

21.1

12.2

7.4

5.5

4.9

4.9

1500 mm (59.1")

22.2

1.9

26.1

14.8

9.0

6.4

5.3

4.9

1800 mm (70.9")

26.5

2.0

31.2

17.5

10.5

7.3

6.0

5.6

NOTE: Scan times are exclusive of serial communication transmission times.

Figure 1-7. Maximum scan times for straight, single-edge and double-edge scanning

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