80S-15贴片机 - 第297页
SIPLACE 80S/F/G Service Manual 9 Revolver Head Edition 04/97 9 - 13 9.3 Functio nal Sequ ences 9.3.1 Reference Run The "refer ence ru n" program moves the m echan ical par t of the mach ine into a define d init…
9 Revolver Head SIPLACE 80S/F/G Service Manual
Edition 04/97
9 - 12
SIPLACE 80S/F/G Service Manual 9 Revolver Head
Edition 04/97
9 - 13
9.3 Functional Sequences
9.3.1 Reference Run
The "reference run" program moves the mechanical part of the machine into a defined initial state after switch-
ing-on or a cold revolver head.
The reference run includes the following functions:
–
Head Reference Run
●
The sz axis (lifting axis) and
●
the dR axis (revolver head axis) are referenced.
●
The dp1 axis (turning station 1, "Rotate before centering") and
●
the dp2 axis (turning station 2, "Rotate before pick-up/placement") are referenced.
●
All segments are turned to the reference angle (90°).
●
The measured vacuum values are registered and the threshold values calculated.*)
●
All nozzles are closed.*)
*) after the gantry reference run above the collecting container
–
Gantry reference run
●
The x axis(axes) and y axis(axes) are referenced
(with 80 S machines, 2 gantries in each case
with 80 F machines 1 gantry in each case).
–
Determine the segment-related head height and thus the nozzle offset.
To compensate for the mechanical tolerances the corresponding clearance values between the conveyor
belt and segment are determined for all 12 segments at the revolver head (sz axes zero position).
–
Determining the vacuum thresholds of all segments
●
Vacuum value for "nozzle open" in the placement circuit
Vacuum value for "nozzle closed" in the placement circuit
(revolver head station 1 forms part of the placement circuit, see Fig. 9.1.2).
●
Vacuum value for "nozzle open" in the ejection circuit
Vacuum value for "nozzle closed" in the ejection circuit
(revolver head station 3 forms part of the ejection circuit, see Fig. 9.1.2 on page 9 - 5).
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.