Actuators with an exactly defined mid
position (Attention: Backlash !) are based on three piston units. The two external
pistons push the piston with the rack into the mid position. If the two
cylinders on both sides are without pressure and only the center piston is
pressurized, the pinion will turn around the complete angle. The speciality of
this construction is, that in spite of the small construction all pistons have
end position damping. Field tests did prove, that this pneumatic end position
damping is superior to the normally used miniature shock absorbers. Actuators
with mid position are available with torque of 50 Ncm, 200 Ncm and 500 Ncm. The
standard models have rotation angles of 180° or 90°. Other angles on request.
For other details please consult the data sheets for Three Position Torque
Cylinder DAD 0050, DAD 0200 and DAD 0500.
