Digital Linear Actuator (Internal Nut)
Conversion of rotary to linear motion inside a linear actuator is accomplished through a threaded
nut and lead screw. The inside of the rotor is threaded and the shaft is replaced by a lead screw. In
order to generate linear motion the lead screw must be prevented from rotation. As the rotor turns the
internal threads engage the lead screw resulting in linear motion. Changing the direction of rotation
reverses the direction of linear motion. The motors rotary step angle. The thread pith of the rotor nut
and lead screw combination determine the linear travel per step of the motor. The travel length and
speed can be digital controlled by the input of data pulses. Moons DLA 11 HS1002-04, is designed
as travel of 0.0035mm per step and can be accurately controlled to drive 35mm movement by a 10K
data pulses input.
Accomplishing the conversion of rotary to linear motion inside the rotor greatly simpliﬁes the process
of delivering linear motion for many applications. Because the linear actuator is self-contained, the
requirements for external components such as belts and pulleys are greatly reduced or eliminated.
Fewer components make the design process easier, reduce overall system cost and size and improve
product reliability. Application: Various valve intelligent controls, Telecommunication Tuning, as vell as
other linear motion control applications.
per Phase per Phase
mH g.cm2 oz-in2
25 26 11 0.06
4.8 3.4 9 0.05