00194614-08 Trainingsdoku. SG X-Serie_X4i SW70x (AL2)_EN - 第237页
C&P20A Pickup and Placement Cycle for C &P20A Board Recognition - Center ing the Board Fiducials 237 Student Guide SIPLACE X-Serie and X4I SW70x (AL2) Board R ecognition - Centering the B oard Fiducials 7.4.4 Boa…
C&P20A
Board Position Recognition Pickup and Placement Cycle for C&P20A
Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 236
▪ Head offset SW 70x is the distance PCB camera <--> nozzle tip
▪ The temperature reference value is the temperature during the last machine calibration.
SIPLACE X4I:
▪ Gantry 4 – position recognition with max. 3 fiducials
▪ Gantry 2 – position recognition with 2 fiducials
▪ Gantries 1 and 3 – dual position recognition
Legend
▪ 1: Gantry 1
▪ 2: Gantry 2
▪ 3: Gantry 3
▪ 4: Gantry 4
▪ T = Transport direction
Board recognition run to target position of board
The fiducial is expected at this target position. The PCB
camera is moved from waiting position to this fiducial
position.
▪ Board position recognition is performed before the
first component is picked up.
▪ The gantry axes move the PCB camera to the
theoretical fiducial position. The camera takes the
picture of the first fiducial and the Vision system
calculates the center position.
C&P20A
Pickup and Placement Cycle for C&P20A Board Recognition - Centering the Board Fiducials
237 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)
Board R ecognition - Centering the B oard Fiducials
7.4.4 Board Recognition - Centering the Board Fiducials
Turning Nozzles 1 to 20 to the Pick up Angle (0° or 90°)
7.4.5 Turning Nozzles 1 to 20 to the Pickup Angle (0° or 90°)
Board recognition - centering the board fiducials
The centered fiducial now defines the actual position of
the board.
▪ The camera records an image of the 2nd fiducial and
the Vision system calculates the center position of
this image.
▪ The 2nd calculation is the deviation between the
target and the calculated fiducial position.
▪ All board fiducials are optically centered with this
procedure.
▪ This data is sent to the machine controller.
▪ Corrected values are now calculated for the X,Y and
angular position of the board.
▪ The gantry axes now move the placement head to the
first pickup position.
▪ The segments in the C&P20A head are turned in
succession, from segment 1 to 20, to the required
pickup angle of 0° or 90°.
NOTICE! Each segment has its own DP drive
C&P20A
Checking the Nozzle Length for Component Recognition Pickup and Placement Cycle for C&P20A
Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 238
Checking the Nozzle Length for Component Recognition
7.4.6 Checking the Nozzle Length for Component Recognition
Picking Up Component 1
7.4.7 Picking Up Component 1
The remaining nozzles now pick up the components as the star is stepped and turn these into the correct
centering angle, before they reach the component camera.
Checking the nozzle length ("component recognition by
component sensor before placement")
Component sensor measures at star pickup position:
▪ Vacuum measurement: ’Segment open’ value
▪ The component sensor measures the length of the
nozzle. The measured length before pickup is verified
with the reference length.
▪ If a difference of -0.15 mm or +0.1 mm is found, the
gantry axes will move the placement head into the
service position for replacement of the nozzle.
▪ Measurement is performed "on the fly" in the star
pickup/placement position.
Picking up component 1
Star position 0°
▪ Vision system: No action
▪ Pickup/placement station: Picking up component 1
▪ Z Axis Down
▪ Vacuum check for component pickup
▪ Component sensor: direct measurement after picking
up the first component (applies accordingly to all
other segments)
▪ Vacuum check after pickup: Check holding force of
the component on the nozzle.
NOTICE
All vacuum measurements during the placement process are performed in the background and
do not produce any error messages. The error messages concerning missing components etc.
are produced only by the component sensor.