KD-2077_SPE_EN.pdf - 第16页

12 4.5.5 Rec ognitio n mark s hapes The recogn ition marks shall c onform to EIAJ ET - 7302 "Recog nition Marks for Sur face Mounting PW B ." 4.5.5.1 Sha pes • The standar d marks sha ll be 13 ty pes shown in &…

4.5 PWB Positioning

4.5.1 PWB positioning reference

Standard: Shape reference

Option: Pin reference

4.5.2 PWB recognition visual field

6.3 mm (camera visual field range)

Figure 5 PWB recognition visual field

4.5.3 Window size

The window size is variable up to 6.3 mm. However, secure a clearance around the recognition

mark.

4.5.4 Recognition mark correction method

The reference marks provided at 2 or 3 positions (Note) are used for positional correction of the

whole PWB. When the marks at 2 positions are detected, the position offset, angle offset, and

PWB expansion/contraction of the whole PWB are corrected. When the 3 marks at 3 positions are

detected, the PWB XY angle offset is additionally corrected.

Note: The positions are optional. Regarding the reference marks at 3 positions, however, these 3

marks must not be aligned on a single straight line. (It is recommended that marks are arranged

at the 4 corners of PWB.)

Figure 6 Reference marks

4.5.5 Recognition mark shapes

The recognition marks shall conform to EIAJ ET-7302 "Recognition Marks for Surface Mounting

PWB."

4.5.5.1 Shapes

• The standard marks shall be 13 types shown in "Figure 7 Recognition Mark Shapes."

• Marks other than "Figure 7 Recognition Mark Shapes", the user prepares templates and they

can be recognized by pattern matching.

Note 1: There shall be no patterns of similar shapes except the target mark shapes in the

visual field. Enough contrast shall be obtained.

• Regarding the triangles, checkers, and user's templates, their shapes rotated in a 90-degree

arc can also be recognized.

Figure 7 Recognition mark shapes

4.5.5.2 Size and tolerance

The external size shall be 0 5 mm to 3.0 mm and the tolerance shall be ±10% or less.

For hollow shapes, the line width of the fringe shall be 0.2 mm or more.

Figure 8 Size and tolerance of each recognition mark

4.5.5.3 Clearance

In the periphery of each recognition mark, secure at least 0.5 mm of space in which no

conductor pattern, solder resist or marking exists, from the outer periphery of the recognition

mark.

Figure 9 Clearance for recognition mark

4.5.5.4 Basic material

• The basic material shall be non-coated copper or coated copper. (For coating, refer to “4.5.6.5

Coating.”)

• Clear contrast is required between the surface of the recognition mark and the adjacent

printed wire material.

• No oxidation or material deterioration shall be found on the recognition mark.

4.5.5.5 Coating

The surface of the recognition mark shall undergo the following coating.

• Transparent anti-oxidant coating

• Nickel plating

• Tin plating

• Gold plating

• Hot air leveler solder coating

4.5.5.6 Flatness

The difference of altitude on each recognition mark surface shall be 0.015 mm or less.

Regarding flux, coating unevenness shall be found.

Figure 10 Cross section and difference of altitude of the recognition mark