DRT - Direct Drive Rotary Stages
Dover Moon
(800) 227-1066
sales@dovermoon.com
www.dovermoon.com
Features
: : High Speed Direct Drive
: : No gear wear, torque
variaons, or backlash
: : Ultra-sff 4 point contact
ball bearing
: : 25mm through-bore
Descripon
Dover Moon's DRT-100 and DRT-200 Rotary Stages are
ultra-compact, direct drive rotary tables that establish a
new level of price, performance, and compactness. Its
direct drive technology eliminates the gear wear, torque
variaons, and backlash convenonal rotary tables encounter. Speed, resoluon, and repeatability are also increased by a factor of ten or more over gear driven rotary
tables. Despite its high level of performance, the DRT
family rotary stages are very compact, with body dimensions of 105mm x 105mm x 65mm. Its 25mm throughbore allows convenient roung of opcal beam paths or
vacuum/pneumac lines.
The DRT-100 and DRT-200 Direct Drive Rotary Stages offer
standard resoluon of 20 and 10 micro-radians respec-
vely ; due to its direct drive technology, the repeatability
is +/- 1 count. High speeds and acceleraons, permit rapid
point-to-point moves. Se3ling mes are minimized due to
the direct drive design, which allows high servo bandwidths to be achieved. Unlike other direct drive rotary
tables, the electronic interface is completely standard,
with digital A Quad B encoder outputs, a standard three
phase brushless motor, and three digital Hall commutaon sensors. This allows the DRT Stages to be driven by
any commercial moon controller/amplifier that can drive
standard three phase brushless motors. The ultra-sff 4
point contact ball bearing provides a high degree of axial
and torsional sffness, and a once per revoluon index
sensor allows a unique home locaon to be defined.
Direct Drive Rotary Stage Specificaons
Specificaons
Table Diameter (mm)
Through-bore Diameter (mm)
Accuracy (uncompensated)
Accuracy, sine compensated, 2 point
Resoluon, Standard
Resoluon, Oponal
Bi-direconal Repeatability
Maximum Speed
Maximum Acceleraon (rev/sec2)
Axial Moon (µm)
Radial Moon (µm)
Tilt Moon (micro-radians)
Axial Load Capacity (N)
Radial Load Capacity (N)
Moment Load Capacity (N-m)
Axial Sffness
Radial Sffness
Torsional Sffness (N-m/rad)
Total Mass (kg)
Rotaonal Inera (kg-m2)
Torque Constant (N-m/Amp)
DRT-100
DRT-200
100
25 millimeters
+/- 875 µrad (+/- 180 arc-sec)
+/- 88 µrad (+/- 18 arc-sec)
20 µrad (4 arc-seconds)
2 µrad (0.4 arc seconds)
+/- 20 µrad
10 rev/sec at 4 arc-sec resoluon
400
<5
<5
< 100
400
200
5
0.9 x 107 N/m
0.9 x 107 N/m
8.0 x 104
2.3
8.85 x 10-4
0.418
200 millimeters
65 millimeters
+/- 150 µrad (+/- 30 arc-sec)
10 µrad (2 arc-sec)
1 µrad (0.2 arc-sec)
+/- 5 µrad
6 rev/sec at 2 arc-sec resoluon
400
<5
<5
< 100
980
490
140.5
2.0 x 108 N/m
3.2 x 107 N/m
5.0 x 104
7.9
9.44 x 10-3
1.09
Dover Moon ▪ 159 Swanson Road, Boxborough, MA 01719 ▪ 508-475-3400 ▪ sales@dovermoon.com ▪ www.dovermoon.com
DRT - Direct Drive Rotary Stages
Specificaons (Connued)
Motor Specificaons
Motor Constant (N-m/√Wa3)
Back-emf Constant
Coil Resistance (Ohms)
Coil Inductance (mH)
Connuous Current (Amps)
Peak Current
Motor Connuous Torque
Motor Peak Torque
Bearing Torque
Available Connuous Torque
Available Peak Torque
DRT-100
DRT-200
0.159
0.418 (V/rev/sec)
6.92
7.5
2.4
6.5 Amps
1.00 N-m
2.73 N-m
0.23 N-m
0.77 N-m
2.5 N-m
0.66 N-m/√Wa3
144 V/KRPM
2.8
13.0
6.2 Amps
48.0 Amps
6.5 N-m
27.7 N-m
0.79 N-m
5.7 N-m
26.9 N-m
DRT-100 Dimensions
Top View
Side View
2015-09-03 Rev B
End View
Dover Moon ▪ 159 Swanson Road, Boxborough, MA 01719 ▪ 508-475-3400 ▪ sales@dovermoon.com ▪ www.dovermoon.com
DRT-200TM Direct Drive Rotary Stage
DRT-200 Dimensions
Top View
Side View
End View
2015-09-03 Rev B
Side View
Dover Moon ▪ 159 Swanson Road, Boxborough, MA 01719 ▪ 508-475-3400 ▪ sales@dovermoon.com ▪ www.dovermoon.com