Cognex In-Sight 1721, Руководство пользователя

Страница: 44 / 156

Section 3: Configuring a Wafer ID Application In-Sight
®
1700 Series Wafer Reader
34
3.5.15 Size
Size defines the expected height and width of a 2D symbol or the characters in a string,
as measured in pixels. The size (height, width) is displayed below the box.
NOTES
■ When a BC 412 or IBM 412 barcode is the selected Mark type, Size is disabled.
■ The location and rotation of the Size are used for positioning only; they do not effect the read. Also,
the default rotation angle is set to the Region’s rotation angle.
■ The Zoom function can be especially useful when positioning the Size region.
To set the mark size:
1 Click the Edit Size button. The image will automatically expand.
2 To move the Size, position the cursor inside the size box, then click and hold the
left mouse button while dragging. To resize the box, position the cursor over an edge
or corner of the box, then click and hold the left mouse button while dragging. To
rotate the Size, press
CTRL+R on the keyboard. Click and hold the left mouse button
while dragging the circle to rotate the region. The region can be rotated
±
45 degrees
TIP To move the region one pixel at a time, use the arrow keys on the keyboard, to resize the
region one pixel at a time, use Shift-arrow keys and to rotate the region one pixel at a time,
use the CTRL+Left/Right arrow keys.
If ‘Chars, SEMI’, ‘Chars, IBM’ or ‘Chars, Triple’ is the selected Mark , Size defines
the height and width expected for each character in the string. To set the size for
characters, position the Size box around a character so that its edges align with
the centers of the strokes, as shown in Figure 3-7. “Square” characters with
horizontal and vertical strokes — such as
0
,
3
, and
Φ
— are the best to use when
setting the size, although any character can be used.
Figure 3-7: Editing Character Size (Enlarged)
If ‘2D Sym, T7 Data Matrix’ is the selected Mark , Size defines the height and
width expected for the entire 2D symbol. To set the size for 2D symbols, position
the Size box so that it aligns with the centers of the corner cells of the matrix, as
shown in Figure 3-8.
Figure 3-8: Editing 2D Data Matrix Size (Shown at 200% Zoom)