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User Manual SIPLAC E HS-60 7 Station extensions Software version SR.503.xx 07/2003 US Edition 7.9 Component sensor 179 7 Fig. 7.9 - 2 Placement head with component sensor 7 The green con trol LED lig hts up if the compon…

7 Station extensions User Manual SIPLACE HS-60

7.9 Component sensor Software version SR.503.xx 07/2003 US Edition

178

7.9 Component sensor

7.9.1 Function

The component sensor is fixed to the underside of the casing of the 12-segment Collect&Place

head (see Fig. 7.9 - 2

). It measures the height of the nozzle and the height of the nozzle with the

component. The component height is then determined from the two values. The sensor thus also

checks that the component is actually present.

Component heights from 0.1 to 4 mm can be checked. It is also possible to determine whether

the component is in its normal position or is sticking to the nozzle on edge. This requires the dif-

ference between the height and width of the component to be at least 100 µm, i.e. component

sizes 0603 or larger.

Fig. 7.9 - 1 Component sensor

To the ‘head gantry

distributor’ board

Infrared LED

Phototransistor

(receiver)

User Manual SIPLACE HS-60 7 Station extensions

Software version SR.503.xx 07/2003 US Edition 7.9 Component sensor

179

Fig. 7.9 - 2 Placement head with component sensor

The green control LED lights up if the component sensor is switched on and the invisible IR light

beam for the component height measurement (see Fig. 7.9 - 2

red strip) is not interrupted. You

can interrupt the IR beam to check that it is working correctly. The green LED must go out.

Green control LED

7 Station extensions User Manual SIPLACE HS-60

7.9 Component sensor Software version SR.503.xx 07/2003 US Edition

180

7.9.2 Measuring conditions

The following conditions must be fulfilled in order to obtain a valid measurement:

– The light beam must touch the empty nozzle tip during the calibration process.

– The nozzle tip must be inside the light beam when it is holding a component.

– Minimum nozzle length 13 mm

– Nozzle length + component height + tolerance < 17 mm

If these conditions are fulfilled, it is possible to determine whether a component is present or ab-

sent, or to measure the component height.

The minimum difference in height is 100 µm.

Fig. 7.9 - 3 Component sensor, working principle

PLEASE NOTE 7

If you are placing 0201 components with the 906 nozzle, it is essential to use the component sen-

sor since no vacuum measurements are possible. 7

Using the component sensor can also improve the dpm rate when placing other small compo-

nents, such as 0402 or 0603 components.

When selecting the component sensor from the package form list, note that the component can

only be placed on machines that are equipped with that component sensor.

Incremental disk

Component

Nozzle

IR LED PhototransistorCross-section through

component sensor