00196044-05 - sg x und x4i fse_en.pdf - 第333页

Collect, Pick and Place Head (CPP) Detailed Standard Pickup Procedure: Z Axis Up Pickup and Placement Cycle for CPP S tudent Guide (FSE) SIPL ACE X Series and X4I Edition 01/2009 EN Collect, Pick and Place Head (CPP) 333…

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Collect, Pick and Place Head (CPP)
Pickup and Placement Cycle for CPP Detailed Standard Pickup Procedure: Z Axis Down
Student Guide (FSE) SIPLACE X Series and X4I
Collect, Pick and Place Head (CPP) Edition 01/2009 EN
332
8.4.11 Detailed Standard Pickup Procedure: Z Axis Down
Enables vacuum query: segment open threshold ? YES
Component sensor switches due to Z axis movement:
Measurement value for nozzle length "empty"
Axis controller:
Enable "light barrier down" signal.
LB down switches:
End signal Z axis positioning down
Z axis measurement value for pickup height optimization
8-12: Star position 0°: detailed pickup sequence - Z axis down
Start gantry axes to the pick up position of next
feeder.
NOTE:
The vacuum for the holding circuit of
each segment is switched on via the
valve terminal, just before pickup is
performed. The vacuum is used for
picking up components and mainly
comes from the pressure control valve.
The holding circuit vacuum is only used
to hold the component on the nozzle
during the star rotation.
Start signal for X and Y axes to move to next
feeder.
End signal X, Y axes:
X/Y end position signals available.
Z axis starts:
Z axis starts positioning downwards
End position signal for star axis
Collect, Pick and Place Head (CPP)
Detailed Standard Pickup Procedure: Z Axis Up Pickup and Placement Cycle for CPP
Student Guide (FSE) SIPLACE X Series and X4I
Edition 01/2009 EN Collect, Pick and Place Head (CPP)
333
8.4.12 Detailed Standard Pickup Procedure: Z Axis Up
8-13: Detailed pickup procedure: Z Axis Up
LB down switches:
Vacuum Threshold comp. picked reached?
YES
Z axis starts:
Z axis starts positioning upwards
Component sensor switches due to Z axis
movement:
Z axis position value; nozzle length +
comp.height measurement threshold
reached? YES
Z axis position in safety area:
reset light barrier state,
X, Y gantry axes start
start component feeder (communication to
feeder table)
Vacuum query:
Vacuum threshold for holding circuit reached?
YES
Star axis starts.
NOTE:
Since the travel paths for each axis can be calculated and are therefore known, the next action
(e.g. starting the Z axis) is started via position flags. These are sent by the predecessor action
(e.g. star axis). This enables the Z axis to start moving 10 ms earlier (depending on the
definition). It no longer needs to wait for the end position signal from the star axis. The end
position signal is therefore no longer in use.
Collect, Pick and Place Head (CPP)
Pickup and Placement Cycle for CPP Standard Mode - Placement: Z Axis Down
Student Guide (FSE) SIPLACE X Series and X4I
Collect, Pick and Place Head (CPP) Edition 01/2009 EN
334
8.4.13 Standard Mode - Placement: Z Axis Down
Axis controller:
Enable signal for "light barrier down" function
LB down switches:
End signal Z axis positioning downwards;
Digital pressure control valve: switches "Air blast ON"
Pickup/placement position; air blast threshold "place component"reached? YES
8-14: Detailed component placement procedure: Z Axis Down
In this mode (light barrier down) the placement
force at the placement head is around 2N.
End position signal for X and Y axes--> Z axis
starts:
Positioning of Z axis downwards
Component sensor checks nozzle length with
component. Z axis measurement value -
nozzle length "with component" - threshold
reached? YES
End position signal for star axis:
Performs vacuum test "before placement".
"Vacuum closed" threshold reached? YES to
determine whether the component is held by
holding force on the nozzle.