80S-15贴片机 - 第336页

9 Revolver Head SIPLACE 80S/F/G Service Manual Edition 04/97 9 - 52 Fig. 9.6.7 Adjustment plates and mounting of dp1 and dp2

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

Edition 04/97

9 - 51

Fig. 9.6.6 Position and structure of turning station dp1

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

Edition 04/97

9 - 52

Fig. 9.6.7 Adjustment plates and mounting of dp1 and dp2

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

Edition 04/97

9 - 53

9.6.3.1 Structure and Function of the Turning Station

Both turning stations, dp1 and dp2, are fitted at the rear of the encoder housing, in other words, the side fac-

ing the lifting slide. In each case an adjustment plate ensures the precise setting of each turning station.

The housing of each turning station is fastened to the encoder housing with two M3 hexagon socket-head

screws from the front of the encoder housing (see Fig. 9.6.7). The slotted screws for fastening the beros are

also accessible from the front of the encoder housing. The fastening screw for dp2 is however not accessible

until the amplifier board has been removed. The encoder housing has two cutouts to allow the conversion

board "Rotate nozzle" of each turning station to be plugged into the corresponding connectors on the "Head"

conversion board.

The feed motor is a d.c. motor and via gearwheel and toothed rack looks after the swivel movement of the

turning station. The feed motors are operated by the motor controller board Y0009.

The bero of each turning station signals the swung-out state - in other words, the turning station has decou-

pled from the segment - as the "active high" state. The turning station is held in its end positions - swung in or

swung out - by means of a holding current at the feed motor. The swinging-in movement, that is, the docking

of the belt pulley and o-ring at the friction wheel of the segment, can only take place when the segment is cor-

rectly positioned in the revolver head station in question - in other words, the end message from the dR

revolver head axis has been received. The swinging-in movement releases the brake which holds the sleeve

in its position.

The motor-tacho combination of the turning station drives the o-ring for the rotational movement of the sleeve

and nozzle of the segment as soon as the turning station has docked with the o-ring at the friction wheel of the

segment. Control of the rotational movement is a closed-loop control circuit with the following components:

–

The axis controller card receives the corresponding machine data from the machine controller, such as, for

example, angle of rotation, motor current and voltage, operating mode, and so on. This operates the servo

amplifier in the servo unit which in turn supplies the drive motor for the rotational movement with the corre-

sponding current and voltage values.

–

The tachometer generator of the turning stations supplies the servo amplifier with the current speed values

for regulating current and voltage.

–

The incremental disk of the segment is scanned by the opto-electrical scanning unit of the turning station.

It supplies the information for the current position of the sleeve and nozzle and returns these data to the

axis controller card. This is where a comparison between the setpoint and actual values is made. The

result of this comparison is passed on as control information to the servo amplifier.

Once the required rotational position of the nozzle has been reached, the turning station swings out. The

brake at the segment holds the nozzles in the required position. Once the turning station has arrived at its

rest position, the bero signals this by an "active high" signal.

A holding current at the feed motor holds the turning station in the swung-out position. The values for

adjusting the feed motor and drive motor (dp1 and dp2 axis) will be found in the machine setup and test.