SIPLACE DX4-Spec-设备性能参数-EN-DMS - 第28页

28 Vision Sensor Technology PCB Position Recognition Bad Board Recognition Ink Spot Criteria Methods • Synthe tic fiducial recogn ition method • Mean gray scale value • Histogram method • Template matching Shapes and siz…

Vision Sensor Technology

PCB Position Recognition

Description

The optimum fiducial shapes

vary according to the condi-

tion of the surface. When

using bare copper surfaces

with low oxidation, it is advis-

able to take the single cross,

as the high amount of infor-

mation provided helps

achieve the greatest

accuracy. Rectangle, square

and circle are less "informa-

tive" but save space and can

even be used when oxidation

is at an advanced stage.

Circle or square are advis-

able for tin-plated structures

as the ratio of the fiducial

dimensions to the presolder

thickness is particularly

favorable.

Fiducial criteria

Locate 2 fiducials

Locate 3 fiducials

X-/Y-position, rotation angle, mean PCB distortion

additional: shearing, distortion separately in X and Y direc-

tion

Fiducial shapes Synthetic fiducials: circle, cross, square, rectangle, dia-

mond, circular, square and rectangular contours, double

cross, pattern: any

Fiducial surface:

copper

tin

Without oxidation and solder resist

Warpage of fiducial  1/10 of structure width, both with good

contrast to environment

Dimensions of patterns

min. size

max. size

0.5 mm

3 mm

Fiducial environment Clearance around reference fiducial not necessary if there

is no similar fiducial structure in the search area

Dimensions of synthetic fiducials

Min. X/Y size for circle and rectangle: 0.25 mm

Min. X/Y size for annulus and rectangle: 0.3 mm

Min. X/Y size for cross: 0.3 mm

Min. X/Y size for double-cross: 0.5 mm

Min. X/Y size for rhombus: 0.35 mm

Min. frame width for annulus and rectangle: 0.1 mm

Min. bar width / bar distance for cross, double-cross: 0.1 mm

Max. X/Y size for all fiducial shapes: 3 mm

Max. bar width for cross/double-cross: 1.5 mm

Min. tolerances, general: 2% of nominal dimension

Max. tolerances, general: 20% of nominal dimension

Vision Sensor Technology

PCB Position Recognition

Bad Board Recognition

Ink Spot Criteria

Methods • Synthetic fiducial recognition method

• Mean gray scale value

• Histogram method

• Template matching

Shapes and sizes of fiducials/structures for

synthetic fiducials

other methods

For dimensions of synthetic fiducials, see page

min. 0.3 mm

max. 5 mm

Masking material Good coverage

Recognition time Depends on the method: 20 ms - 200ms

Description

In the cluster technology

each subpanel is assigned

an inkspot. If this is present

during the measurement via

the PCB vision module, the

corresponding subpanel is

populated. This function

helps prevent unnecessary

costs caused by placement

of defective panels.

Technical data for PCB position detection

PCB fiducials

Local fiducials

Library of bad panel recognition

Up to 3 (subpanels and multiple panels)

Up to 6 for the long board option (optional PCB fiducials

are output by the optimization.)

Up to 2 per PCB (may be of different type)

Up to 255 fiducial types per subpanel

Image analysis Edge detection method (singular feature) based on gray

scale values

Lighting method Front lighting

Fiducial recognition time 0.1 s

Field of vision 5.78 mm x 5.78 mm

01005 Placement

In its standard version, the

SIPLACE DX4 is designed

for placement of 01005 com-

ponents (0.4 mm x 0.2 mm).

The SIPLACE component

library already contains the

contours and dimensions of

01005 components. Spe-

cially developed component

nozzles of type 1005 are also

available for the SIPLACE

DX4. These are adjusted to

the shape and size of the

01005 components and have

- as with all other SIPLACE

nozzles - a highly wear-proof

ceramic tip and flexible noz-

zle seat. This guarantees

maximum precision and pro-

cess reliability. Optimized

pickup is guaranteed by the

ideal feeding conditions in

the SIPLACE X feeder mod-

ule. The smaller the ele-

ments to be picked up, the

more accurate the pickup

needs to be.

Pickup is performed contact-

free to compensate minor

inaccuracies e.g. from com-

ponent or pocket tolerances

and to prevent mechanical

damage to the components.

The design of the SIPLACE

X feeder modules takes this

problem into account: new

motors and the reduced use

of fine mechanics help.

Small components can be

placed without perfor-

mance loss, with minimum

pitch and irrespective of the

larger components which are

next to the 01005 --compo-

nent. This equates to true

01005 capability. As a rule

with 01005 placement, a

finely tuned overall 01005

process is the basic require-

ment if you want to achieve

excellent results.

All the process parameters

must be optimized. The

SIPLACE team will be

pleased to advise you on

how to do this.

01005 measurement

results and ambient condi-

tions

As the dpm values and

pickup rates for 01005 place-

ment depend greatly on the

respective measuring condi-

tions, it is not advisable to

specify these without consid-

ering the corresponding

ambient conditions.

The following table shows typical values for 01005 placement,

which can be achieved with a SIPLACE DX4, provided the rel-

evant underlying conditions are fulfilled:

Machine type SIPLACE DX4

Placement head SpeedStar with component camera

type 23

Nozzle type 1005

Feeder module type 2x8mm SIPLACE X feeder module

Station software 706.01 or later

SIPLACE Pro 10.0 or later