Specification SIPLACE CS-Speed.pdf - 第20页

18 Description The standard component vision module is d irectly integr ated into the Collect & Pla ce Head. While the component is cycling into the next station of the Co llect & Place Head, the recorded im age …

Description

In the cluster technology each

subpanel is assigned an ink spot.

If this is present during the meas-

urement via the PCB vision mod-

ule, the corresponding subpanel is

populated. It is also possible to ac-

complish the population of the

subpanel when the ink spot is

missing. With this function it is

possible to eliminate costs due to

unnecessary population of faulty

subpanels.

Global Ink Spot

Global Ink SpotGlobal Ink Spot

Global Ink Spot

Each bad board evaluation needs

time, so naturally the consumed

time increases with the number of

subpanels per PCB. Using a global

ink spot can result in a significant

reduction of these secondary

times.

The PCB vision module searches

at positions taught before for the

defined fiducial. In case of recogni-

tion there is no following evalua-

tion of subpanels. The system al-

lows the customer to choose also

the opposite interpretation.

Position Recognition of Feeder

Position Recognition of FeederPosition Recognition of Feeder

Position Recognition of Feeder

The pick-up position of the com-

ponents can be determined pre-

cisely with the aid of the position

recognition of the feeder. It is acti-

vated each time after a change of

feeder or component table. The

offset in position relative to the

stored ideal position is determined

on the basis of fiducials on the

feeder modules using the PCB vi-

sion module. This provides a very

high pick-up reliability even for the

very first component. This is par-

ticularly important with small com-

ponents.

Vision Sensor Technology:

Bad Board Recognition

Position Recognition of Feeder

Ink Spot Criteria

Evaluation method

for fiducials

for structures

brightness method

contrast method

Shapes and sizes of

fiducials/structures for

brightness method

contrast method

square or circular forms

edge length/diameter 0.3 - 5 mm

rectangular forms

edge length 0.3 - 5 mm

Masking material mat dark (light-absorbing)

not recommended: white or shiny

Ink spot recognition time 0.3 s for each method

Description

The standard component vision

module is directly integrated into

the Collect & Place Head. While

the component is cycling into the

next station of the Collect & Place

Head, the recorded image is eva-

luated by the central vision sys-

tem. The component rotation is

then corrected by the appropriate

angle based on the position off-

sets determined with vision in-

spection.

Vision Sensor Technology:

Standard Component Vision Modules for the 6-Nozzle

Collect & Place Head

Standard Component Vision Module for the 6-Nozzle C & P Head

Component size

minimum

maximum

0.6 x 0.3 mm

(0201)

18.7 x 18.7 mm

Component range See table on page 6

Camera’s field of view 24 x 24 mm

Illumination Front light

(3 freely programmable planes)

Pixel size 50 µm

Description

Despite the highly stable machine

frame, slight distortions of the

gentry axes cannot always be

avoided. With the aid of the

mapping process the high place-

ment accuracy of the machine is

preserved throughout its entire

service life.

With this calibrating procedure,

which can be conducted quickly

and easily, the PCB camera recog-

nizes the fiducials on a mapping

calibration plate placed in its oper-

ating area. Any distortions are re-

vealed by comparing the nominal

grid on the glass plate with the

actual grid “drawn” by placement

head. These distortions are taken

into account during all further

positioning of X-/Y-axes and

thus compensated for.

Machine Criteria:

Mapping (Option)

Technical Data

Dimensions of the mapping test plate 520 x 460 mm

Number of measurement points 13 x 11 (standard resolution)

26 x 21 (high resolution)

Ambient temperature during calibration + 20° ± 3°C

Components of the option Test plate (special glass)

Calculation data (disk)

Case for secure storage

Nominal Grid of Mapping Plate and Actual Grid with

Deviations Due to Gantry

Corrected

Position