80S-15贴片机 - 第323页
SIPLACE 80S/F/G Service Manual 9 Revolver Head Edition 04/97 9 - 39 Fig. 9.5.12 Screwdriver unit 2 The driv e motor s its in th e hole in the pos ition of revol ver hea d station 3. The gea rwheel on the mot or shaft m e…
9 Revolver Head SIPLACE 80S/F/G Service Manual
Edition 04/97
9 - 38
The motor control board 1710460-Y0009 controls the screwdriver unit 1. Fig. 9.5.11 shows the principle
behind the determination of the rotational movement for opening and closing the segment.
NOTE
The screwdriver unit blade must always be horizontal or the eccentric shaft of the segment will jam at the
screwdriver. The revolver head cannot be cycled on (see also the section 9.8 ”Segments”).
9.5.7 Screwdriver Unit 2 (Ejection and Checking the Nozzle)
Screwdriver unit "2" (see Fig. 9.5.12) moves the sealing piston of the segment in revolver head station 3. It is
mounted on the lifting slide housing (see 9.5.5.1) in revolver head station 3.
In revolver head station 3 components will be ejected and the segment closed under the following fault
conditions:
–
Components not correctly picked-up
–
Components with vacuum error "Good or bad nozzle contact"
–
Components with CRDL measurement error, rotational or centering error
In addition, during the placement cycle the nozzle will be checked for contamination as described in the sec-
tion 9.5.4 ”Vacuum Measuring Board”. The sealing piston is retracted by the screwdriver rotating by 180° and
thus at the same time the vacuum duct of the segment is opened. This is followed by the screwdriver rotating
by a further 180° but in the opposite direction which causes the sealing piston to move forward, thus closing
the segment again. The closed segment is cycled on with the revolver head.
The movement of screwdriver 2, like that of screwdriver 1, is signalled by the bero as an end signal to the
input board of the control unit. Screwdriver unit 2 is controlled, like screwdriver unit 1, by the motor controller
board 1710460-Y0009.
Screwdriver unit 2 in revolver head station 3 (see Fig. 9.5.12) consists of the following components:
–
drive motor
–
gearwheel with stop nipple
–
stop for limiting the rotational movement
–
gearwheel support
–
gearwheel with tripping face for the bero and screwdriver unit blade
–
miniature ball bearing (2 of these)
–
spring lock washer
SIPLACE 80S/F/G Service Manual 9 Revolver Head
Edition 04/97
9 - 39
Fig. 9.5.12 Screwdriver unit 2
The drive motor sits in the hole in the position of revolver head station 3.
The gearwheel on the motor shaft meshes with the teeth of the gearwheel with turned-on shaft which is
mounted at each end in 2 miniature ball bearings. The miniature ball bearing at the revolver head end is
accommodated in the gearwheel support. The screwdriver unit blade engages with the slot in the segment at
revolver head station 3. The screwdriver unit blade must be at an angle of 30° to the sz axis (see Fig. 9.5.13).
NOTE
If the screwdriver unit blade does not make an angle of 30° with the sz axis, the screwdriver unit blade will not
be able to slide in die groove of the cam. The revolver head will jam.
The bero is inserted from above into the hole in the gearwheel support and fixed at the corresponding trigger-
ing distance. The toothless section of the gearwheel circumference is used for as a sensing face for the bero
and triggers the end message for rotation of the screwdriver.
9 Revolver Head SIPLACE 80S/F/G Service Manual
Edition 04/97
9 - 40
The rotational movement of the screwdriver is restricted by the stop nipple on the face of the motor gear-
wheel. After each rotation of 180° the stop nipple will lie up against the stop. The screwdriver is fixed in the
end position by a holding current.
Screwdriver unit 2 is activated as soon as the end message of the dR revolver head axis for "Revolver head
division reached" is received.
Fig. 9.5.13 30° - position of the screwdriver unit blade with respect to the sz axis in screwdriver unit 2
The rotational movement for the open or closed segment is determined similarly to the procedure shown in
Fig. 9.5.11.
9.5.8 Circular Arc Guidance for the Segments
The circular arc guide holds the segments at a defined clearance from the revolver head center point which is
also the center of rotation. While the revolver head turns the segment ball bearings roll along the circular inner
faces of the fixed and removable circular arc guides (link). There are breaks in the circular arc guides in each
case at the top, that is, at revolver head station 7 and at the bottom, that is, at revolver head station 1.