80S-15贴片机 - 第299页
SIPLACE 80S/F/G Service Manual 9 Revolver Head Edition 04/97 9 - 15 9.3.4 Ejection optimizati on with vacuum error If the vac uum te st at rev olver head stati on 1 indic ates a pick-up error for a com ponent, the gantr …
9 Revolver Head SIPLACE 80S/F/G Service Manual
Edition 04/97
9 - 14
9.3.2 Sequence of Head and Gantry Reference Run in the 80 S Machine
1. sz axis reference
2. x, y and dR axis reference
3. dp1 and dp2 axis reference
4. Gantry 1 and gantry 2 approach the collecting container.
5. Screwdriver 2 closes all segments, any components which may be present are ejected. Turning station
dp1 moves all segments into the reference position.
6. Gantry 1 moves into the stand-by position above the feeder area.
7. Gantry 2 moves into the height reference position at the fixed transportation edge of the board conveyor.
Vacuum reference and height reference run (nozzle offset) of the sz axis are performed at gantry 2.
The vacuum reference run takes place at gantry 1.
8. Gantry 2 moves into the stand-by position above the feeder area
9. Gantry 1 measures the conveyor width which is set.
10.Gantry 1 moves to the height reference position and performs a height reference run (nozzle offset).
11.Gantry 1 moves into the stand-by position.
9.3.3 Pick-Up and Placement Cycle
The following head functions are performed when a component is picked up and placed:
1. Before picking up, the nozzle is rotated into its pick-up position.
2. The readiness of the conveyor to operate is tested.
3. The revolver head picks up the component.
4. A check is made that the component was picked up correctly.
5. Before centering and CRDL testing the component is turned into the measuring position.
6. The component is mechanically centered. If the CRDL testing option is installed, CRDL testing is carried
out when requested by the placement program.
7. The component is optically centered if this is included in the placement program.
8. The component is rotated into the required placement position.
9. The component is set down on the PCB.
10.If errors occur during steps 1 - 9, the component in revolver head station 3 will be ejected.
11.The revolver head cycles on while the gantry axis is moving.
NOTE
As regards the position and functions of the individual revolver head stations please refer to Fig. 9.1.2.
SIPLACE 80S/F/G Service Manual 9 Revolver Head
Edition 04/97
9 - 15
9.3.4 Ejection optimization with vacuum error
If the vacuum test at revolver head station 1 indicates a pick-up error for a component, the gantry moves the
revolver head to over the collecting container. The segment is cycled on from revolver head station 1 to
revolver head station 3. Any component which may be present is ejected and the segment closed. The seg-
ment is then cycled on from revolver head station 3 to revolver head station 1. The gantry moves the revolver
head back over the transportation area. The revolver head picks up a fresh component. If this again is not
successful, the revolver head cycles the segment on. The pick-up error is added to the "Not done" list and the
component, if present, ejected during the repairs cycle.
9.3.5 Repairs Cycle
If mechanical and optical centering errors, CRDL testing errors and vacuum errors have occurred during the
pick-up and placement cycle, the component is added to a "Not done" list. Once the placement cycle is fin-
ished, all defective components will be ejected. In the repairs cycle all components which have been added to
the "Not done" list will be inserted.
9 Revolver Head SIPLACE 80S/F/G Service Manual
Edition 04/97
9 - 16