00198442-04_UM_TX-V2_EN.pdf - 第142页
3 Technical data and assemblie s Instruction manual SIPLACE TX 3.7 PCB conveyor system From software version 714.0 12/2020 142 3.7 PCB conveyor system 3.7.1 Description The PCB conveyors are designed as three-part convey…
Instruction manual SIPLACE TX 3 Technical data and assemblies
From software version 714.0 12/2020 3.6 Gantry system
141
3.6.4 Y axis structure
3
Fig. 3.6 - 4 Y axis structure
The Y axis essentially consists of the following main modules:
(1) Y linear motors (primary part) on the X axis with fixed and loose bearing mounted
(2) Permanent magnet (secondary part of the X-axis linear motor)
(3) Length measurement system
(4) Guidance system
(1)
(4)
(3)
(2)
(4)
3 Technical data and assemblies Instruction manual SIPLACE TX
3.7 PCB conveyor system From software version 714.0 12/2020
142
3.7 PCB conveyor system
3.7.1 Description
The PCB conveyors are designed as three-part conveyors with input, processing and output con-
veyor sections. The two areas, input conveyor and output conveyor, serve as buffer zones for the
printed circuit boards.
The conveyor belts are driven by brushless DC motors. Light barriers monitor and control trans-
portation of the boards. Once the board has reached the placement area and has passed the light
barriers, it is braked. A laser light barrier records 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.
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 the PCB. The placement rate is thus inde-
pendent of the PCB thickness. The PCB fiducial centering can also be optimized. Since the dis-
tance between the PCB surface and the PCB camera remains the same, the PCB camera is
always focussed on the PCB surface with the same sharpness. The PCB fiducial contours are op-
timally 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 electronics activate the drive motor until the
required width has been reached. The width adjustment is therefore independent of other machine
components.
The conveyor height can be selected on the placement machine to allow them to be integrated
into lines with a conveyor height of, 900, 930 or 950 mm. The standard height is 930 mm.
The communication between the PCB conveyors of the individual placement machines takes
places via the SMEMA interface.
Instruction manual SIPLACE TX 3 Technical data and assemblies
From software version 714.0 12/2020 3.7 PCB conveyor system
143
3.7.2 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. The fixed conveyor sides are both "outside" as a default. As an option,
the fixed conveyor sides can be selected as right/right or left/left. The PCB dual conveyor can also
be operated as a single conveyor, as an option.
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Fig. 3.7 - 1 Structure of the PCB dual conveyor
(1) Input conveyor
(2) Processing conveyor
(3) Lifting table 2
(4) Output conveyor
(5) Lifting table 1
T1 Conveyor track 1
T2 Conveyor track 2
3.7.2.1 Flexible PCB dual conveyor - lanes and types
The right-hand conveyor lane (viewed in the direction of transport) is known as "conveyor 1" while
the left conveyor lane is termed "conveyor 2" (see fig. 3.7 - 3
, page 145 ).
(1)
(2)
(3)
(T1)
(T2)
(4)
(5)