80S-15贴片机.pdf - 第321页

SIPLACE 80S/F/G Service Manual 9 Revolver Head Edition 04/97 9 - 37 Fig. 9.5.11 Determination of the direction of rotation of the screwdriver unit 1 On the mot or shaft s its the ge arwheel wi th stop nipple whi ch limi …

9 Revolver Head SIPLACE 80S/F/G Service Manual

Edition 04/97

9 - 36

Fig. 9.5.10 Screwdriver unit 1

Screwdriver unit 1 consists of the following components:

–

drive motor

–

gearwheel with stop nipple

–

stop for limiting rotation

–

deep-grooved ball bearing

–

gearwheel with tripping face for the bero

–

miniature ball bearing

–

bero with cable bracket

–

conversion board "Screwdriver 1" 1710491 - Y0307 with plug connection to the conversion board "Head"

1710491-Y0303

A d.c. motor controls the rotation of the screwdriver 1 which moves the sealing plunger. The motor is fitted

from the rear side of the lifting slide with 2 fillister head screws M1.6.

SIPLACE 80S/F/G Service Manual 9 Revolver Head

Edition 04/97

9 - 37

Fig. 9.5.11 Determination of the direction of rotation of the screwdriver unit 1

On the motor shaft sits the gearwheel with stop nipple which limits rotational movement at the stop to 180° in

each case. The stop is screwed to the segment claw.

The sealing piston is held in the respective end position by means of holding current. The screwdriver itself is

a gearwheel with a turned-on shaft. The shaft at one end is mounted in a miniature ball bearing, at the other in

a deep-grooved ball bearing. The motor pinion meshes with the teeth of the gearwheel.

The shaft end pointing to the segment claw is flattened on two opposite sides and forms the screwdriver unit

blade. Accordingly, the screwdriver engages with the slot in the eccentric shaft of the segment in the revolver

head station 1. For an area extending over 90° the gearwheel has no teeth (see Fig. 9.5.10). When the

screwdriver rotates, this section activates the bero in the segment claw. It sends the end signal when the

screwdriver has completed its rotation.

The bero cable runs in the recess in the lifting slide to the screwdriver 1 conversion board and from there is

routed to the plug at the "Small axis" conversion board 1710460-Y0005. A cable bracket above the segment

claw protects it against being damaged when the sz axis moves.

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