00196693-03_UM_SX4DX4_SR706_EN.pdf - 第141页
User Manual SIPLACE SX4/DX4 3 Technical data and assemblies From software version SC.706.xx V ersion 06/2012 EN 3.7 PCB conveyor system 141 3.7.6.2 PCB warp age during placement A warpage of 2 mm can lead to problems foc…
3 Technical data and assemblies User Manual SIPLACE SX4/DX4
3.7 PCB conveyor system From software version SC.706.xx Version 06/2012 EN
140
3.7.6 Definition of PCB warpage
3.7.6.1 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
User Manual SIPLACE SX4/DX4 3 Technical data and assemblies
From software version SC.706.xx Version 06/2012 EN 3.7 PCB conveyor system
141
3.7.6.2 PCB warpage during placement
A warpage of 2 mm can lead to problems focussing 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
3 Technical data and assemblies User Manual SIPLACE SX4/DX4
3.8 Vision system From software version SC.706.xx Version 06/2012 EN
142
3.8 Vision system
3.8.1 Structure
A component camera is integrated at each Collect&Place head (see fig. 3.5 - 2 page 112 and fig.
3.5 - 4
page 117). The component camera, stationary, P&P (type 33) 55 x 45, digital, for the Mul-
tiStar and the TwinStar is 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 changing the placement head from TwinStar to SpeedStar, the stationary component cam-
eras of type 33, 55 x 45, digital, and type 25, 16 x 16, digital (FC camera) need to be dismantled
from the TwinStar, otherwise the SpeedStar will collide with the camera housing.
When changing the placement head from TwinStar to MultiStar, the stationary component cam-
era, type 33, 55 x 45, digital, is fitted in the bottom position.