创建组件识别数据的方法.pdf - 第120页

120/178 IM-SMT-VSNDI C-0002 -000 Figure 95 (2) Special 2: Check Lead B righ tness Option 1: Recog nition Flag Option 2: Com p. Intensit y (0-255) Option 3: Check method 0: Lead Brightnes s This check s to see if the bri …

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“Align size X,Y” are used to check the component size.
The size of the outer edge is set to “Body Size” and the component size on the image is set to
“Align size”.
Figure 93
[Recognition check items]
Items Yes / No
Notes
Body Size Yes
Lead pitch No
Lead width Yes
Lead length
Lead position No
Nozzle check
Yes
“Lead Brightness” check.
Note *1
“Symmetry” check (Only when the threshold is set to 0.)
Table 87
Note *1:
The “Lead Brightness” function checks if the brightness of the electrode section of the chip is
smaller than the specified value. If it is smaller, it is detected to be an error.
2.11.6. Special recognition of chip components (standard chips, MELF chips,
special chips)
There are a number of special recognition algorithms available for the Standard Chip, MELF
Chip, and Special Chip Recognition modes.
(1) Special 1: Chamfer Lead
Option 1: This is used to specify the direction of the component whose leads are partly
missing. (Sets the numbers as shown in Figure 94.)
Figure 94
For instance, when performing recognition on the component placed vertically like shown in
Figure 95, 1 is specified.
Vertically placed
Horizontally placed
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Figure 95
(2) Special 2: Check Lead Brightness
Option 1: Recognition Flag
Option 2: Comp. Intensity (0-255)
Option 3: Check method
0: Lead Brightness
This checks to see if the brightness of the electrode section of the chip is
smaller (darker) than the specified value. If it is smaller, it is determined to be
an error.
1: Lead Brightness + Symmetry
(This mode is used if the chip is a standard chip and the threshold value is 0.)
Please refer to “2.11.1. Standard chips” for “Symmetry”.
2: Lead Brightness + Difference
In “Difference” mode, when the upper and lower (or left and right) brightness
ratio exceeds a certain value (less than 0.7 or more than 1.5), it is determined
to be an error.
Option 4: Trapezoid Tolerance (0-255)%
Even though the lead width on one side is out of the tolerance range, if the
lead width on the other side is within the tolerance and the degree of
trapezoid (the ratio between the widest and narrowest lead width) is within the
trapezoidal tolerance, it is determined to be satisfactory.
(3) Special 3: Check Direction
The direction of the component is determined by the brightness of the specified circular
region. (*This needs to be custom-ordered.)
Option 1: Recognition Flag
Option 2: Min. Brightness Difference (If 0, 50 will be set)
If the difference in the average brightness of the detection circle checked for
direction determination is smaller than the value, it is determined to be an
error.
Bit position
Bit position
Check Type (0:Black, 1: White)
Check Direction (0:2
angle, 1: 4 angle)
Check Many Adsorption
(0: None, 1: Exist)
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The detection circle used to differentiate the direction is set as the first Lead
Group in the East direction if the leads are placed vertically, and in the North
direction if they are placed horizontally.
- Number of Lead Group: 1
- Number of leads: 0
- Lead length: 0
- Lead width: Diameter of detection circle (mm)
- Lead pitch: 0
- Lead reference position X: Detection circle center position X
- Lead reference position Y: Detection circle center position Y
Based on the results obtained from the “Direction check”, add +90°, +180° or +270° to
the tilt of the component and set the value to the fields of “Lead Width” and “Lead
reference position X, Y”.
(4) Special 4: Nozzle check (check the center of the chip)
Option 2: Threshold used for check (0 ~ 255)
Option 3: Diameter of the detected region
1 - 255 (unit: 0.1 mm -> allowable setting range: 0.1 mm - 25.5. mm)
Option 4: NG Condition (0: Less than threshold, 1: More than threshold)
Figure 96
(5) Special 5: Retry Lead Center Search
When detecting the edge in the lead width direction, the recognition is performed several
times while changing the detection line position slightly each time, and the value closest to
the component data is adopted as the result.
Option 1: Recognition Flag
(6) Special 6: Check Upside-Down
This checks the difference between the brightness of the outer periphery of the component
and the center of the component in order to identify the top surface and bottom surface of the
component.
Option 1: Min. Brightness Difference
If the difference between the brightness of the outer periphery of the component
Bit position
Angle Correction: (0:None, 1: Exist)