00195760-0102_UM_D3_SR605_EN - 第132页
3 Technical data for the machine User Manual SIPLACE D3 3.7 PCB conveyor system From software version SR.605.xx 07/2008 EN Edition 132 3.7.7.2 PCB warp age during placement A warpag e of 2 mm can lead to problems focussi…
User Manual SIPLACE D3 3 Technical data for the machine
From software version SR.605.xx 07/2008 EN Edition 3.7 PCB conveyor system
131
3.7.7 Definition of the PCB warpage
3.7.7.1 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
3
Fixed clamped edge
Movable clamping device
Printed circuit board
Conveyor side wall
Fixed clamped edge
Conveyor belt
Printed circuit board
PCB transport direc-
tion
5.5 mm
3 Technical data for the machine User Manual SIPLACE D3
3.7 PCB conveyor system From software version SR.605.xx 07/2008 EN Edition
132
3.7.7.2 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
User Manual SIPLACE D3 3 Technical data for the machine
From software version SR.605.xx 07/2008 EN Edition 3.8 Vision system
133
3.8 Vision system
3.8.1 Structure
A component camera is integrated into each Collect&Place head (see Fig. 3.5 - 2 page 108 and
Fig. 3.5 - 4
page 112). The stationary P&P component vision camera (type 33) 55 x 45 digital for
the TwinHead 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 TwinHead to the Collect&Place head, the Twin-
Head's stationary component vision camera, P&P (type 33) 55 x 45, and stationary P&P compo-
nent vision camera (type 25) 16 x 16 digital must be removed, otherwise the Collect&Place head
will collide with the camera housings.