8
9.
Setting the mechanical stop
There is one adjustable screw available for setting the mechanical limit of the 90° angular stroke.
When setting the mechanical end positions, only the handwheel may be used. Do not
operate the actuator electrically.
Remove the protection cap (Figure 6; Pos. 2) from the stop screw.
Back off the stop screw anti-clockwise approx. 5 turns.
Move the actuator to the closed position by turning the handwheel clockwise.
Turn stop screw for closed position (Figure 6, Pos. 1) finger tight, then a half turn back.
Replace the protection cap onto the stop screw.
Pos. ①: Stop screw
Pos. ②: Protection cap
Figure 7: Mechanical stop
10.
Adjustment of limit switches
Figure 8: Setting the switching cams for stroke limit switches
The standard limit switches serve to switch-off the motor when the end positions are reached.
Additional limit switches are free of voltage and serve to indicate the valve position. These are available as optional
auxiliaries. The switches are activated by cams. These cams are stepless adjustable on their shaft by means of a
friction coupling.
Ensure that the mains supply is secured against accidental switching-on!
②
①
①
③
②
Pos. ①: Switching cam CLOSE position
Pos. ②: Switching cam OPEN position
Pos. ③: Supporting bridge for screw driver
NOTE:
Use the bridge (Figure 8, Pos. 3) as support for the
screw driver when adjusting the cams.
