Hanwha SM481 PLUS Series Administrator’s Guide Eng.pdf.pdf - 第207页

7-49 Part Registration the position of the part to be picked up b y applying an of f set based on the part center . Selecting this selection box will set the X, Y a nd Z offse t s from the part c enter from the actual pa…

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Fast Flexible Placer SM481(L) PLUS Administrator’s Guide

If the area obtained by adding the 'Recognition Area Margin' to the part size is

called the ‘Part Recognition Area’, in normal cases the shape of the picked part

must be within the ‘Part Recognition Area’.

However, even though the shape of the picked part has gotten out of the ‘Part

Recognition Area’ due to other external factors, if the part can be placed properly

by compensating the extent of deviation, it is possible to place the corresponding

part properly by setting the 'Recognition Area Margin'.

In general, set a value within the range of 0~6. For a chip part, it is recommended

that the default value be used.

1: Center of Mechanism

2: Area with a Recognition Area Margin of '0'

3: Part Recognition Area

 <Recog. Threshold> combo box

The image viewed through the vision window consists of each pixel. Each pixel

has its own value from 0~ 255 according to the degree of viewed brightness.

Here, the 'Threshold' signifies the boundary value that distinguishes whether to

recognize each pixel as white or black.

 <Center Offset> group

 <Center Offset check> check box

When it is not possible to set the part center as a pickup point, it is possible to set

Part Size Recognition Area Margin

0402~1608 0.750

2012~3216 1.500

3216~□5mm

2.000

□5mm~□10mm

3.000

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Part Registration

the position of the part to be picked up by applying an offset based on the part

center.

Selecting this selection box will set the X, Y and Z offsets from the part center

from the actual part pickup position.

For more details regarding part recognition option parameters other than those described

here, refer to “7.2.2.5.1. Recognition Option Setup by Part”.

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Fast Flexible Placer SM481(L) PLUS Administrator’s Guide

7.2.2.5.1. Recognition Option Setup by Part

Describes the option related parameters allowing a part to be recognized under various

conditions by part.

 Leadless Part (Chip)

Describes the recognition option applied to most of the leadless parts.

 <Tolerance H(+)> edit box

In general, a part has a manufacturing tolerance. When the size of the recognized

part is larger than that in the registered part data, if its tolerance is not considered,

its inspection result will be no good.

Therefore, when recognizing a part, input the extent of the allowable difference

between the actual size and registered size as a percentage.

That is, when the value obtained by recognizing an actual part with the vision

system is greater than the input value, if the actual data value is allowed up to 1.3

times of the input data, the upper tolerance is 30%.

For the following chip parts, set the parameters referring to the following. For

other chip parts, it is recommended that the default value be used.

 Chip-Circle

Tolerance is applied not to the length but to the area.

If a tolerance is applied to 10% of the diameter, the square of the diameter

must be applied. Therefore, apply 21% actually. (Tolerance (Over, Under)

=1.1´1.1=1.21 )

 Chip-C 0402 /Chip-R 0402 /Chip-C 0603 /Chip-R 0603/ Chip-R 1005

Set the tolerance to be greater than the value to be set by more than 10%. For

example, when setting the tolerance to 20%, actually apply 30%.

 <Tolerance H(-)> edit box

If the size of the recognized part is smaller than the registered part data, input the

tolerance as a percentage.

That is, when the actually recognized value is smaller than the input value, if the

actual data value is allowed up to 0.7 times of the input data, the lower tolerance

will be 30%.