| Details on Specifications for PILine® Drives |
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| Motion and Positioning |
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Travel range
The maximum allowed travel is limited by the length of the friction bar in a PILine® drive. The distance between the two limit switches gives the travel range.
Minimum incremental motion
The typical minimum motion that can be executed for a given input in open-loop operation, which is sometimes referred to as practical or operational resolution. The data table states typical measured values. For repeatable minimum incremental motion, a position feedback sensor and servo loop is required.
For repeatable nanometer or subnanometer resolution see the Piezo Flexure Stages / High-Speed scanning Systems (see link), Piezo-Walk® Motors / Actuators (see link) and Piezo Actuators & Components (see link) Sections.
Max. velocity
This is the short-term peak value for horizontal mounting, with no load, and not intended for continuous operation. The average velocity and continuous velocity are lower than the peak value and depend on the load conditions and other environmental parameters.
Mechanical properties
Stiffness when powered down
Stiffness in motion direction. Typical tolerance: ±10%
Push / pull force
Active force limit in operating direction. The maximum force depends on the velocity.
Holding force when powered down
A main feature of piezomotor linear drives is the self-locking capability at rest, without current consumption and heat generation. Piezomotor characteristics cause a decline of the holding-force in long-term offtime. The data refer to the longterm minimum holding force.
Drive properties
Resonant frequency
Ultrasonic excitation frequency of the piezo ceramic actuator
Motor voltage range
Required excitation voltage range.
Operating voltage drive electronics
Supply voltage for the drive electronics. It is recommended to operate PILine® drives with suitable PI drive electronics only, referred to in the individual data table.
Miscellaneous
Operating temperature range
Safe operation, no damage to the drive. All technical data specified in the data sheet refer to room temperature (22 °C ±3 °C).
Mass
Typical tolerance: ±5%
Cable length
Typical tolerance: ±10 mm
Recommended controller/driver
To reach the specifications and to avid damage to the drive, it is strongly recommended to use PI driver and control electronics only. Compatible controllers already include the ultrasonic drive electronics
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