Non magnetic, used in 26T magnetic fields
nm position resolution
20 mK to 375K, vacuum compatible
Internal sliding contacts (static electrical wires)
Self-locking, holding force of several 100 N
No power dissipation when “off”
Cry Optical Encoder option “COE”
Non-magnetic version of the Cryo Linear Actuator (CLA) which is developed for positioning in a cryo-vacuum environment. Internal piezo ceramics generate a torque pulse which causes the spindle to rotate relative to the stationary nut yielding linear motion. A coating is applied on the spindle for good tribological behavior without any lubrication. The result is an actuator ideally suited for set and forget applications with positioning capabilities in the nm range and driving forces up to 30 N. The system is self-locking and a holding force of several 100 N is possible.
|Type of motion||-||x|
|step size @ 293K||nm||5-25|
|step size @ 4K||nm||1-5|
|Max. velocity @ 293K||µm/s||15|
|Max. velocity @ 4K||µm/s||3|
|Min. required preload||N||3|
|Max. driving force||N||30|
|Operating voltage||V||-20 … +130|
|Main construction material||-||Phosphor bronze, titanium, ceramic|
|Dissipation @ 293K||mJ/step||0.59|
|Dissipation @ 4K||mJ/step||0.055|
|Controller/driver||-||CAB-230(115), CADM(2), MCM|
|* Linear resolution can be found by dividing the spindle pitch by PPR (pulses per revolution)|
The objective is to reposition the moving mass from p0 to p2. In the initial condition a steady-state voltage is applied to the piezo and a normal force F is applied to the moving mass to generate friction.
Slowly decreasing the voltage shortens the piezo and the inertial mass is ‘pulled’ to position x1 . The moving mass remains on its initial position (p1 = p0) due to the friction.
Now, the voltage is rapidly increased to expand the Piezo to its original length. This rapid expansion accelerates the inertial mass and the resulting force on the moving mass overcomes the friction, causing a shift to position p2. Because the inertial mass is larger (more inertia) it will move less backwards than the moving mass shifts forward. After this step the system is in steady state again, at position p2, ready for the next step.
CLA2602 Cryo Linear Actuator size 26, Non Magnetic
CLA2602-COE CLA2601 incl. Cryo Optical Encoder, Non Magnetic