X3_X4_Series machine - 第135页

User manual SIPLAC E X-Series 3 Technical data Software Vers ion SR.601.xx 11/ 2005 US Ed ition 3.7 Placem ent heads 135 3.7.4.1 Descriptio n The 6-seg ment Co llect & Place h ead al so works o n the Co llect & P…

3 Technical data User manual SIPLACE X-Series

3.7 Placement heads Software Version SR.601.xx 11/2005 US Edition

134

Fig. 3.7 - 11 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) C&P component camera, type 29, 27 x 27, digital

User manual SIPLACE X-Series 3 Technical data

Software Version SR.601.xx 11/2005 US Edition 3.7 Placement heads

135

3.7.4.1 Description

The 6-segment Collect&Place head also works on the Collect&Place principle. The high-resolu-

tion digital component camera allows the 6-segment Collect&Place head to place components

with an edge length of up to 27 mm accurately and very quickly. 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.

3.7.4.2 Checking and self-learning functions

The checking and self-learning functions described on page 130 for the 12-segment

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

3.7.4.3 Description of the functions

Fig. 3.7 - 12 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 X-Series

3.7 Placement heads Software Version SR.601.xx 11/2005 US Edition

136

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 feeder module 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.