00196504-02_UM_X-Serie_SR70X_EN.pdf - 第160页
Technical data for the machine User manual SIPLACE X-series PCB conveyor system From software version SR.70x.xx 01/2011 EN edition 160 3.7.8.2 PCB warp age during placement A warpag e of 2 mm can lead to p roblems focusi…
User manual SIPLACE X-series Technical data for the machine
From software version SR.70x.xx 01/2011 EN edition PCB conveyor system
159
3.7.8 Definition of the PCB warpage
3.7.8.1 PCB warpage on the conveyor
PCB warpage across the direction of travel max. 1 % of the PCB diagonal, but not exceeding 2
mm
3
PCB warpage in direction of travel + PCB thickness < 5.5 mm
3
Fixed clamped edge
Movable clamping device
Printed circuit board
Conveyor side wall
Fixed clamped edge
Conveyor belt
Printed circuit board
PCB transport direction
5.5 mm
Technical data for the machine User manual SIPLACE X-series
PCB conveyor system From software version SR.70x.xx 01/2011 EN edition
160
3.7.8.2 PCB warpage during placement
A warpage of 2 mm can lead to problems focusing on local fiducials and ink spots in the middle of
the PCB. The digital camera's focus is 2 mm. When all the tolerances are taken into account, this
value is reduced to 1.5 mm. Also note that the component height is reduced by the warpage.
3
3
PCB warpage down, max. 0.5 mm
3
→ Use magnetic pin supports to achieve this value.
Movable clamping device
Fixed clamped edge
Printed circuit board
Conveyor side wall
Printed
circuit board
Magnetic pin
support
Movable clamping device
Fixed clamped edge
Conveyor side wall
0.5 mm
User manual SIPLACE X-series Technical data for the machine
From software version SR.70x.xx 01/2011 EN edition Vision system
161
3.8 Vision system
3.8.1 Structure
A component camera is integrated into each Collect&Place head (see Fig. 3.5 - 2, page 124 and
Fig. 3.5 - 4
, page 128). The stationary P&P component vision camera (type 33) 55 x 45 digital for
the MultiStar and TwinStar is permanently fixed to the machine frame.
The component vision module is used to determine:
– the precise position of the components at the nozzle and
– the geometry of the package form.
The PCB vision module uses fiducials on the PCBs to determine:
– the position of the PCB,
– its rotation angle
– and the PCB skew.
The PCB cameras are fixed to the bottom of the gantries. They use fiducials on the feeder mod-
ules to determine the exact pick-up position of components, which is particularly important for
small components.
WARNING
RISK OF HEAD CRASH 3
When the placement head is changed from the TwinStar to the SpeedStar, the TwinStar's station-
ary component cameras (P&P, type 33, 55 x 45, digital, and type 25, 16 x 16, digital (FC camera))
must be removed, otherwise the SpeedStar will collide with the camera housings.
If the placement head is changed from the TwinStar to the MultiStar, the stationary component
camera, type 33, 55 x 45, digital, is installed in the lower position.