8801 In Stock

The 8801 by Newport is a precision Picomotor Driver designed to facilitate incremental linear motion with sub-30 nm accuracy through the utilization of a piezo-electric transducer. This transducer is employed to induce screw rotation, leading to controlled linear movement. This driver's unique configuration allows it to maintain position stability within 10 nm, irrespective of its power status, as its piezo mechanism is dedicated to screw rotation rather than positional holding. Control of the 8801 can be achieved both manually, utilizing a compatible control pad, and electronically, by interfacing with the driver's digital or analog control input lines. When paired with a power supply, this driver can be easily integrated into setups, enabling connection to motorized devices via the driver's output jack(s) located on its rear panel.

The 8801 has an innovative design grounded in the principles of static and dynamic friction. The driver features dual jaws capable of securely gripping an 80-pitch screw, which serve as the mechanical foundation for controlled motion. These jaws are manipulated by a piezoelectric transducer that imparts opposing movements, resulting in precise screw rotation. The driver's operational behavior is contingent upon the speed of these actions; rapid manipulation yields no rotation, whereas slow modulation leads to screw turning. Manipulating the piezo with pulses characterized by swift rise times and gradual fall times initiates counter-clockwise screw rotation, while employing pulses with gradual rise times and swift fall times effects clockwise rotation. The 8801 employs a "bootstrap" mechanism to initiate stable amplitude pulses when initiating motion from rest or altering its direction. Consequently, the first 10 pulses may exhibit variance in step size. Additionally, factors such as operational lifespan, wear and tear, temperature fluctuations, applied load, and direction of rotation contribute to variations in linear travel per pulse and angle change.