Servomech S.p.A.
16.20-25-27-28.E - Rev. 00 DD (M/Y) 12/19
20
4. Rotary potentiometer fine adjustment
If a fine adjustment of the potentiometer is necessary, it is possible to act on the reaction arm which fixes
the potentiometer body as shown in the following figure.
•
Loose the locking screw.
•
Adjust the angular position of the potentiometer through the adjustment slot.
•
Tighten the locking screw.
6.7
Safety clutch FS
Safety clutch device is NOT available for CLA 20 actuator.
The safety clutch is a device able to protect the actuator and the machinery where it is installed from dynamic
overload during the linear travel and from incorrect use which could bring the actuator to the mechanical
stop. This device is a torque limiter on the worm wheel.
The torque limiter clutch is preloaded during
assembly.
The preload is fixed and related to the ratio and the
performances of each actuator as stated on the
performance tables in the catalogue.
On request, a different preload can be set to achieve
different performance.
If an overload is applied on the actuator, the safety
clutch starts slipping and the push rod stops while the
motor is still running. When the overload decreases up
to the rated load value or less, the safety clutch stops
slipping and the push rod starts travelling again.
The safety clutch FS is not intended to be used as a load limiter, but only to protect the actuator and
the machinery where it is installed.
DO NOT USE THE SAFETY CLUTCH AS A STROKE END CONTROL DEVICE! If it is frequently activated it
rapidly wears, the preload is reduced and consequently also the actuator load performance is lower.
Locking screw
Adjustment
slot
Reaction
arm
Potentiometer marker
