ANT-20G0 pages
NANO Technology
ANT-20G Series
ANT-20G Series
nano Motion Technology
Direct-Drive Goniometers
Noncontact, non-cogging, frictionless directdrive for zero backlash or hysteresis
High speed (150°/s)
High resolution (0.05 arc second)
Excellent in-position stability
Large 20° rotation angle
Compact design
Aerotech’s ANT-20G goniometers represent a significant
breakthrough in the high-accuracy angular alignment of
components. This unique design utilizes Aerotech’s best-inclass direct-drive noncontact motor technology. When used
with Aerotech’s controllers, the ANT-20G series provides an
industry-leading positioning speed of 150 degrees per
second.
High-precision bearings, direct on-axis encoder feedback, and
noncontact and noncogging direct-drive technology assure
the highest level of performance and make excellent
repeatability and in-position stability a reality. The goniometer
cradles can be mounted orthogonally to provide pitch and roll
about the same point in space. Combining this with a rotary
stage under the orthogonal assembly adds a third rotation
axis (pitch, roll, yaw) through the same point.
The critical elements of the ANT-20G goniometers, as with all
other ANT series nanopositioners, were selected to operate in
a 24/7 manufacturing environment. Unlike worm- or piezodriven goniometers, the ANT-20G series will not require
periodic adjustment or maintenance. This will assure many
years of trouble-free operation. The ANT-20G cradles are
available in four sizes.
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www.aerotech.com
U.S. Patent No. 6,442,851
ANT-20G-90 0.25 µrad or 0.05 arc sec step size
2.25
0.45
2.0
0.4
1.75
0.35
1.5
0.3
1.25
0.25
1.0
0.2
0.75
0.15
0.5
0.1
0.25
Position (arc sec)
No maintenance
Clockwise from upper
left: ANT-20G-50
mounted in an
orthogonal configuration
with an ANT-20G-90,
ANT-20G-110, and an
ANT-20G-160.
Position (µrad)
Orthogonal mounting of two cradles
provides rotation about the same point
0.05
0
0
-0.25
-0.05
0
5
10
15
Time (s)
20
25
ANT-20G-90 step plot. Best-in-class resolution and exceptional inposition stability for large angular travel stages.
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