Amplifiers, Drivers &Controllers Closed-Loop Position Controlfor Higher Accuracy PI offers a wide range of stand-ard amplifiers and controllers
for
piezo actuators. The E-651.1S and E-651.2S desktop
controllers and the E-614.2BS
OEM board are specificallydesigned to operate P-871 ben-der actuators.
Of course, PI also designs cus-tom actuators, amplifiers and
controllers. P-871s are ideal devices forscanning, positioning and
beam deflection applications
and provide much better accu-
racy, stability and repeatability
than conventional open-loopactuators. The special benderdesign allows the direct appli-
cation of a
strain gauge sensor
to the surface without the need
for a polymer insulation layer
in between. The advantages
are faster response, reducedphase lag and precise positioncontrol with non-linearity of <0.5%. The settling time for a
small-signal step (up to 1%
nominal travel) to an accuracy
of better than 1% is between10 ms (P-871.112) and 30 ms(P-871.140).
P-871
Closed-Loop, High-Deflection PICMA
® Multilayer Piezo Bender Actuators (LVPZT)
Ordering Information P-871.112 Closed-loop Piezo Bender Actuator,
160 µm, 9.6 mm Width, SGS P-871.122 Closed-loop Piezo Bender Actuator,
400 µm, 9.6 mm Width, SGS P-871.127 Closed-loop Piezo Bender Actuator,
720 µm, 9.6 mm Width, SGS P-871.128 Closed-loop Piezo Bender Actuator,
720 µm, 6.3 mm Width, SGS P-871.140 Closed-loop Piezo Bender Actuator,
1600 µm, 11.0 mm Width, SGS P-871.140, P-871.128, P-871.122 and P-871.112 closed-loop bender actuators (from left to right). Closed-Loop Operation for Superior Accuracy Nanometer-Range Resolution Deflection up to 1.6 mm Ceramic Insulation for Extended Lifetime Ideal for Scanning Applications Vacuum-Compatible Versions Long Lifetime and HighPerformance—Ideal for
Dynamic Operation Low Operating Voltage PICMA Mounting Hardware Included Special Controllers / Drivers Available P-871
transducers are uniqueclosed-loop piezo benders
based on the open-loop PL122
to PL140 PICMA
® -series multi-layer actuators. Equipped with
high-resolution position feed-
back sensors they provide bet-
ter linearity, accuracy and
repeatability than other piezo
benders on the market. P-871bender actuators achieve
longer positioning ranges thantypical piezo actuators, up to
1.6 mm, and response times in
the millisecond range. For ease
of installation, the units come
complete with the mountinghardware, cables and connec-tors.
Application Examples ® Bender actuators aresuperior to conventional actua-
tors in high-endurance situa-
tions. They show substantiallylonger lifetimes both in staticand dynamic operation, even
in harsh environments. The
monolithic, ceramic-encapsu-
lated design provides better
humidity protection than poly-
mer-film insulation. Diffusionof water molecules into the
insulation layer is greatlyreduced by the use of cofired,
outer ceramic encapsulation.
Wire bonding Fiber optic switches Beam deflection and stabilization Scanning of optical com-
ponents Alignment of optical com-
ponents
E-651 2-channel and 1-channel controllers with P-871 bender actuators © PI 1998-2005. Subject to change w/o notice. Cat 118 05/09.17 1-16