00195760-0102_UM_D3_SR605_EN - 第124页
3 Technical data for the machine User Manual SIPLACE D3 3.7 PCB conveyor system From software version SR.605.xx 07/2008 EN Edition 124 3.7.1.2 Structure of the flexible PCB dual conveyor The flexible dual conveyor has tw…
User Manual SIPLACE D3 3 Technical data for the machine
From software version SR.605.xx 07/2008 EN Edition 3.7 PCB conveyor system
123
3.7 PCB conveyor system
The machine is supplied with a single PCB conveyor as standard. The PCB dual conveyor is avail-
able as an option from the factory (see Section 3.7.1.2
, page 124). The left or the right side of the
PCB conveyor can be used as the stationary side, as required.
The conveyor belts are driven by DC motors. There is a lifting table for clamping the PCBs in each
processing area. The PCB conveyor width can either be set from the user interface or preset in
the placement program.
3.7.1 Structure
3.7.1.1 Structure of the PCB single conveyor
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Fig. 3.7 - 1 Structure of the PCB single conveyor
(1) Input conveyor
(2) Processing conveyor 1
(3) Intermediate conveyor
(4) Processing conveyor 2
(5) Output conveyor
(6) Lifting table 1
(7) Lifting table 2
(8) Assembly tray
3 Technical data for the machine User Manual SIPLACE D3
3.7 PCB conveyor system From software version SR.605.xx 07/2008 EN Edition
124
3.7.1.2 Structure of the flexible PCB dual conveyor
The flexible dual conveyor has two conveyor tracks that are electrically and mechanically inde-
pendent of one another.
3
Fig. 3.7 - 2 Structure of the PCB dual conveyor
(1) Input conveyor
(2) Processing conveyor 1
(3) Lifting table 1
(4) Intermediate conveyor
(5) Processing conveyor 2
(6) Lifting table 2
(7) Assembly tray
(8) Output conveyor
T1 Conveyor track 1
T2 Conveyor track 2
3.7.2 Description
For placement, the PCB is clamped from below. The distance between the top of the PCB and the
placement head thus remains unchanged for each PCB, and is not dependent on the thickness of
User Manual SIPLACE D3 3 Technical data for the machine
From software version SR.605.xx 07/2008 EN Edition 3.7 PCB conveyor system
125
the PCB. The placement rate is thus independent of the PCB thickness. The PCB fiducial center-
ing can also be optimized. Since the distance between the PCB surface and the PCB camera re-
mains the same, the PCB camera is always focussed on the PCB surface with the same
sharpness. The PCB fiducial contours are optimally mapped on the CCD chip of the PCB camera.
The width of the circuit board conveyor is set and monitored by an integral control circuit. It can
be selected by calling up the program. The control circuit then actuates the stepping motors until
the desired width is reached. The width adjustment is therefore independent of other machine
components.
The conveyor height can be modified on the machine, thus allowing it to be integrated into lines
with a conveyor height of 830, 900, 930 or 950 mm.
The PCB conveyors communicate with the individual machines via the SMEMA interface or the
optional Siemens interface.
The fixed transport side can be located on the left or right for both the dual conveyor and the single
conveyor. With this conveyor, the fixed side can be easily switched from right to left and vice versa
using the station software.
The circuit board conveyor is monitored and controlled with optical sensors. If the board has
reached placement area and passed the light barrier, it is braked. A laser light barrier determines
the position of the board. As soon as the circuit board has reached its target position, the conveyor
belt is stopped and the board is clamped from below.
3.7.3 Definition of conveyor tracks and transport modes
The right conveyor track (viewed in the transport direction) is designated "Conveyor 1" and the left
as "Conveyor 2" (see Fig. 3.7 - 4
, page 127).
3.7.3.1 Definition of the conveyor track width
3.7.3.2 Standard width
The standard width of the conveyor track is the maximum conveyor width defined by the desired
position of the stationary conveyor side. It is no more than 216 mm per track.
3.7.3.3 Overwide conveyor track
The conveyor track can be widened to 250 mm maximum by moving the stationary conveyor side
wall out of its normal position.