00195440-05-SG_D-Series_FSE-EN - 第212页
11 Component Handling 11.5 Room for Your Sketches and Notes 11.4.5 Feeder Modules 212 Student Guide SIPLACE D-Series (FSE)
11 Component Handling
11.4.5 Feeder Modules 11.5 Room for Your Sketches and Notes
Student Guide SIPLACE D-Series (FSE) 211
11 Component Handling
11.5 Room for Your Sketches and Notes 11.4.5 Feeder Modules
212 Student Guide SIPLACE D-Series (FSE)
12 Modular Conveyor
12.1.1 Clamping 12.1 Functions
Student Guide SIPLACE D-Series (FSE) 213
12
12 Modular Conveyor
Modular Conveyor
12.1
12.1 Functions
Functions
12.1.1
12.1.1 Clamping
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.
PCBs up to 368 mm long are clamped in the appropriate placement areas. Clamping does not take place
on the input and output conveyor. Boards with a length over 368 mm (option "long board": to 610 mm)
are kept in a clamped position on the conveyor belt up to a length of 360 mm (D1/D1i/D2/D2i: 440 mm)
and are then supported in the placement area only by the lifting table.
12.1.2
12.1.2 Width adjustment
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 uses a stepping motor, meaning that the new
PCB width can be set independently of other machine components.
The conveyor sides are fixed by means of a clamping unit on a steel strip.
The PCB width is adjusted via two adjustment units, installed under the input or output conveyors.
▪ The stepping motor moves the two adjustment units synchronously through the use of ball screws
and a toothed belt.
▪ To adjust the board width, the two adjustment units are positioned under the relevant conveyor side.
The precise position is detected by a BERO on the adjustment unit.
▪ The conveyor side is mechanically connected to the adjustment unit by extending the pneumatically-
actuated fixing pins. This disables the clamping of the conveyor side (at the steel strip).
▪ Once the new PCB width is reached the fixing pins of the adjustment unit are retracted once more.
The conveyor side is clamped again.
On the dual conveyor, the widths of the conveyor tracks have to be set one after the other (just one drive
for both conveyor tracks). The maximum and minimum PCB widths are protected by limit switches. If the
two conveyor sides of a conveyor lane are not parallel, this is automatically corrected during the width
adjustment. The two adjustment units are moved under the fixed conveyor side and the other conveyor
side is adjusted. Adjustment relates to the center point between the positions of the two adjustment units.
The adjustment unit which reaches its position under the flexible side first, locks the side. The process
continues until the second adjustment unit has reached its position and has also locked the flexible con-
veyor side. The position of the conveyor side has now been recorded, fixed with the adjustment unit and
is ready to set the correct board width.
The flexible dual conveyor can also be used as a single conveyor by closing up track 2 (max. PCB format
368 x 380 mm).
12.1.3
12.1.3 Checking the PCB position on the conveyor sections
Checking the PCB position on the conveyor sections
The positions of the PCBs is identified using light barriers (transmitter modules and receiver modules).
The transmitter light barriers are positioned below the transport belts. They are directed past the trans-
port belt to the opposite conveyor side to the receiver above the belt.
The signal from the light barriers stops PCBs in the input conveyors, intermediate conveyors and output
conveyors. These three light barriers can be assembled into four different positions to recognize also
"irregular" circuit boards (PCB with cutouts).
In the placement area, the light barrier triggers the deceleration or braking procedure via the DC motors.
A time period has already been set in the software for slow board approach towards the laser light bar-
rier.