Siemens 6DR55 Series Manual page 53

Procedure
90_
(1)
(1) Transmission ratio switch interlock
(2) Open
(3) Friction clutch
(4) Close
Adjustable retaining device for the friction clutch
Figure 25
SIPART PS2 PA Manual
A5E00127926--05
After you have mounted the positioner and commissioned it completely,
you can set the friction clutch torque as follows:
Plug a conventional 4 mm wide screwdriver into a slot in the yellow
S
wheel.
Then turn the yellow wheel to the left with the screwdriver until it
S
snaps in audibly. This increases the torque of the friction clutch.
A fixed friction clutch is recognizable from an approx. 1 mm wide
S
gap between the yellow and black wheel.
If you have to make a zero point setting, e.g. after changing the
S
drive, please reduce the torque first by turning the yellow wheel to
the right stop. After the zero point setting, you can fix the friction
clutch as described above.
To lock the transmission ratio selector, takt the unit as factory set and
do as follows:
Using a conventional flat headed screwdriver (approx. 4 mm wide)
S
turn the yellow wheel underneath the clamps to the left or right
according to your chosen setting (either 33_ or 90_) until it snaps in
audibly.
In order to set the transmission ratio selector any locks in place
S
must first be released. Hence the yellow wheel must first be put into
the original factory set position in order to reset the transmission
ratio selector if necessary, e.g. after replacing the actuator.
90
33
33_
Preparing for operation
(2)
(4)
(3)
51