00194614-08 Trainingsdoku. SG X-Serie_X4i SW70x (AL2)_EN.pdf - 第378页
Component Handling Control Unit on Tape Cutter (CAN Node Modu le) Room for Your Sketches and Notes Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 378
Component Handling
Room for Your Sketches and Notes Control Unit on Tape Cutter (CAN Node Module)
377 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)
Component Handling
Control Unit on Tape Cutter (CAN Node Module) Room for Your Sketches and Notes
Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 378
Modular Conveyor
Function Description General
379 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)
Modular Conveyor
11 Modular Conveyor
Function Description
11.1 Function Description
General
11.1.1 General
The standard SIPLACE machine is equipped with a single PCB conveyor. A dual conveyor is available
as an option. Depending on your requirements, you can choose the left or right conveyor side as a fixed
conveyor side. The SIPLACE X4I is designed for high placement performance and is therefore only
supplied with a dual conveyor. The fixed conveyor side can be selected as required - left, right or both
outer conveyor sides (i-placement).
In the Processing Area (PA1 or PA2), the PCB board will be clamped from the bottom side against the
fixed holder on the conveyor system. The distance between the top of the PCB board and the placement
head is therefore always the same for each board, regardless of the board thickness. This has the
following advantages:
▪ The placement rate is also no longer dependent on the PCB board thickness.
▪ Furthermore, the fiducial recognition can be optimized,
The consistent space between the board upper edge and the PCB camera means that the PCB
camera is always optimally focussed on the upper side of the board. The PCB fiducial shape is
optimally imaged on the CCD chip of the PCB camera.
The machine height can be selected to allow the machines to be integrated into lines with a transport
height of 830, 900, 930 or 950 mm. Communication between the PCB conveyors of the different
machines is provided with the help of a SMEMA or (optionally) SIEMENS interface.
Movement of the PCBs in the input conveyor, intermediate conveyor and output conveyor is monitored
and controlled with light barriers, consisting of a sender module and a receiver module:
▪ When the PCB reaches the placement area, the PCB is detected by a light barrier and the speed of
the conveyor belt is reduced.
▪ About 100 ms later, a laser beam recognizes the front edge of the slowly approaching board, the
board is stopped and clamped into place from below.
Clamping
11.1.2 Clamping
The PCB is lifted for placement of components and pressed up against the PCB clamping rail. When the
lifting table rises the PCB and the complete conveyor drive unit is lifted up to the clamping position.
Therefore the placement level is constant and independent of the thickness of the PCB.
Boards up to 450 mm (X series) or 380 mm (X4I) length are clamped in the respective placement fields.
Clamping does not take place on the input and output conveyor. Boards with a length exceeding 450 mm
(only X series up to 610 mm) lie with a length of 450 mm on the conveyor belt, when clamped, and are
supported in the placement area only by the lifting table.
Width Adjustment
11.1.3 Width Adjustment
The width is adjusted by means of a motor as programmed. With the dual conveyor, different widths are
possible for the two conveyor tracks. The width adjustment is performed with a stepping motor and a
downstream electronics system for evaluating the step pulses. These then give the width of the conveyor
tracks.
The conveyor sides are fixed by means of a clamping unit on a steel strip.
NOTICE
X4I
The maximum board length for the X4I is 380 mm. The "Long Board" option is not available in
this case.