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User manual SIPLAC E HF series 3 Technical data Software Vers ion SR.50x.xx 01/2006 US Edition 3.7 Placement heads 125 3.7.3.1 Descriptio n The 6-seg ment Co llect & Place h ead al so works o n the Co llect & Pla…

3 Technical data User manual SIPLACE HF series

3.7 Placement heads Software Version SR.50x.xx 01/2006 US Edition

124

Fig. 3.7 - 7 6-segment Collect&Place head - Function groups, part 2

(1) Intermediate distributor board, beneath the cover

(2) Star drive - DR motor

(3) Z axis motor

(4) Valve adjustment drive

(5) 39 x 39 component vision camera

User manual SIPLACE HF series 3 Technical data

Software Version SR.50x.xx 01/2006 US Edition 3.7 Placement heads

125

3.7.3.1 Description

The 6-segment Collect&Place head also works on the Collect&Place principle. With the stan-

dard component vision module, the HF machine places components with an edge length of up

to 32 mm quickly and very accurately. It is therefore ideal for use with products containing a large

proportion of ICs. A considerable increase in output can be achieved even in the main application

range from PLCC 44 to QFP 208. 3

The 6-segment Collect&Place head can optically center and place components from 0.6 x

0.3 mm² to 13 x 13 mm² using the optional DCA vision module. The DCA vision module optimizes

the speed and accuracy when placing high-speed flip-chips and bare die components The values

are shown in the table on page 127

. 3

Checking and self-learning functions 3

The checking and self-learning functions described on page 120 for the 12-segment

Collect&Place head also apply to the 6-segment Collect&Place head. 3

3.7.3.2 Description of the functions

Fig. 3.7 - 8 Description of the functions

Component camera

DP axis

Rotate component

into placement position

Remove sleeve

or insert

Z axis

Pick up component

or place it

Star axis

Star rotation

Reject component

3 Technical data User manual SIPLACE HF series

3.7 Placement heads Software Version SR.50x.xx 01/2006 US Edition

126

Æ The 6-segment Collect&Place head has three axes - the DR or star axis, the Z axis and the

DP axis.

Æ The star rotates about the star axis with its 6 segments. The segments hold the sleeves.

There is a nozzle seated on every sleeve, which sucks up the components, and transports

them from the pick-up/placement position (1) to the reject position (2), to the optical centering

position (4) or to the turning position (5).

Æ The Z axis performs a vertical movement. Every sleeve that is in the bottom star position (1)

is raised or lowered by this axis, thus picking up the components from the feeder modules

and setting them down on the PCB. The Z axis is an "intelligent axis". It "notes" the pick-up

height of each conveyor track and the placement height for each component. This can speed

up the placement process. The programmed placement force remains constant.

Æ The DP axis rotates the optically centered component to the desired placement angle. The

sequences of movements of the rotation and translation axes are controlled by control cir-

cuits. Position and speed sensors send the actual values for the axis movement to the axis

control. The setpoint and actual values are compared and used to determine the force and

speed parameters for the servo amplifier, and thus the axis movement to be performed. The

vacuum values at the nozzle are constantly checked throughout the entire pick-up and place-

ment process in order to keep the placement error rate as low as possible.