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9 Revolver Head SIPLACE 80S/F/G Service M anual Edition 04/97 9 - 48 Fig. 9.6.4 Assemblies of the encoder housing “complete“ - front v iew

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

Edition 04/97

9 - 47

The following modules form the main parts of the encoder housing "complete" (see Fig. 9.6.3):

See Fig. 9.6.3: Rear view

–

Encoder housing with three spacer bolts for the precise adjustment of the clearances encoder

housing and the lifting slide housing

–

Rotational drive of the revolver head with

●

drive motor with tacho

●

toothed belt pulley, 21 teeth

●

toothed belt

●

toothed belt pulley, 112 teeth

–

Turning stations dp1 and dp2

–

Revolver headRevolver head

–

Vacuum distributor piece for the revolver head

See Fig. 9.6.4: Front view

–

Conversion board "Head" 1710491-Y0303

–

Three amplifier boards for the scanning units of dp1, dp2 and revolver head

–

Quintuple board dp2 1710491-Y0305

–

Quintuple board dp1 and revolver head 1710491-Y0304

–

Encoder for the revolver head (dR axis) with

●

Incremental disk and

●

Scanner unit for the revolver head

–

Housing cover with camera mount for the PCB camera

–

Cover with flap

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

Edition 04/97

9 - 48

Fig. 9.6.4 Assemblies of the encoder housing “complete“ - front view

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

Edition 04/97

9 - 49

9.6.2 Rotational Drive of the Revolver Head

The positioning system of dR axis (revolver head axis) is a closed-loop control circuit. This circuit includes the

following components:

–

machine controller and axis controller card in the slide-in control unit

–

servo amplifier in the servo unit

–

rotational drive of the revolver head

–

encoder of the revolver head

The machine controller supplies the axis controller with the machine data for cycling on the revolver head.

This in turn operates the servo amplifier which supplies the drive motor with the voltage and current values it

needs. The encoder returns the current position of the revolver head to the axis controller. Here the actual and

desired position data of the revolver head are compared. The axis controller activates the servo amplifier until

the setpoint position is reached. The tachometer generator of the drive motor supplies the servo amplifier with

an analog signal which varies in accordance with speed. With the aid of this signal the output voltage and cur-

rent of the servo amplifier are stabilized for the drive motor.

The rotational drive cycles the revolver head on by the steps specified by the axis controller - in other words,

the segments are in each case transported on from revolver head station to revolver head station.

The rotational drive of the revolver head consists of the following components:

–

direct current servo motor with built-on tachometer generator

–

toothed belt pulley, 21 teeth

–

endless toothed belt

–

toothed belt pulley, 112 teeth

The drive motor is fastened with three M3-slotted screws to the encoder housing. The holes in the

encoder housing for the fastening screws take the form of slots so that the tension of the drive belt can be set

precisely.

The drive motor rotates anti-clockwise, looking from the front of the encoder housing.