DRT-200™ Rotary Table
Direct Drive Rotary Table
Features
: : Speeds to 6
revolutions per
second
: : 1 micro-radian
(0.2 arc-second)
resolution
: : No gear wear,
torque variations,
or backlash
: : Ultra-stiff 4
point contact ball
bearing
: : 65mm
through-bore
Danaher Motion-Dover’s DRT-200 rotary stage
is an ultracompact, direct drive rotary table that
establishes a new level of price, performance, and
compactness. Its direct drive technology eliminates
the gear wear, torque variations, and backlash
conventional rotary tables encounter. Speed,
resolution, 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-200
stage is very compact, with body dimensions of
210mm x 210mm x 843mm. Its 65mm through-bore
allows convenient routing of optical beam paths or
vacuum/pneumatic lines.
The DRT-200 table offers a standard resolution of 10
microradians (~2 arc-seconds, or 0.00051 degrees);
due to its direct drive technology, the repeatability
is +/- 1 count, or +/- 10 micro-radians. Speeds to
6 revolutions per second, and accelerations to
400 revolutions per second2, permit rapid pointto-point moves. Settling times 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 commutation sensors. This allows the
DRT-200 Stage to be driven by any commercial
motion controller/amplifier that can drive standard
three phase brushless motors. The ultra-stiff 4
point contact ball bearing provides a high degree of
axial and torsional stiffness, and a once per
revolution index sensor allows a unique home
location to be defined.
DRT-200 ROTARY TABLE SPECIFICATIONS
Specification
Table Diameter
200 millimeters
Through-bore Diameter
65 millimeters
Accuracy (uncompensated)
+/- 150 micro-radians (+/- 30 arc seconds)
Resolution
Standard: 10 micro-radians (2 arc-seconds)
Optional: 1 micro-radian (0.2 arc-seconds)
Bi-directional Repeatability
+/- 5 micro-radians
Maximum Speed
6 rev/sec at 2 arc-second resolution
Maximum Acceleration
400 rev/sec2
Axial Motion
< 5 microns
Radial Motion
< 5 microns
Tilt Motion
< 100 micro-radians
Axial Load Capacity
980 N
Radial Load Capacity
490 N
Moment Load Capacity
145.0 N-m
Axial Stiffness
2.0 x 108 N/m
Radial Stiffness
3.2 x 107 N/m
Torsional Stiffness
5.0 x 104 N-m/radian
Total Mass
7.9 kg
Rotational Inertia
9.44 x 10-3 kg-m2
Torque Constant
1.09 N-m/Amp
Motor Constant
0.66 N-m / √Watt
Back-emf Constant
144 V/KRPM
Coil Resistance
2.8 Ohms
Coil Inductance
13.0 mH
Continuous Current
6.2 Amps
Peak Current
48.0 Amps
Motor Continuous Torque
6.5 N-m
Motor Peak Torque
27.7 N-m
Bearing Torque
0.79 N-m
Available Continuous Torque
5.7 N-m
Available Peak Torque
26.9 N-m
DRT-200™ Rotary Table
DRT-200 ™ Rotar y Table
D A N A H ER
DRT-200 ROTARY TABLE SPECIFICATIONS
DRT-200 R OTA RY T A BL E SPECI F I CAT I ON S
210
8.27
175
6.89
210
8.27
264
10.39
175
6.89
4X COUNTERBORES FOR M6 OR
1/4" SOCKET HEAD CAP SCREWS
65
2.56
200
7.87
M5x.8 TAPPED HOLES
(4) PLACES ON A 100mm BOLT CIRCLE
(4) PLACES ON A 150mm BOLT CIRCLE
84.3
3.32
D9 MALE MOTOR HALL EFFECT CONNECTOR
HD-15 MALE ENCODER CONNECTOR
HIGH POWER 3 PIN MALE MOTOR CONNECTOR
POSITRONIC P/N CBD3W3M0000Z
MATING CONNECTORPOSITRONIC P/N CBD3W3F0000X
Third Angle Projection
• Cleanroom compatible option available.
• 9,9; 9,15; 3,15,9 pin configurations available.
M ov i n g T h e Wor l d, On e N an om et er A t A Ti m e.™
•
Cl ean r oom com pat i bl e opt i on avai l abl e.
•
9,9; 9,15; 3,15,9 pi n con f i g u r at i on s avai l abl e.
PR037/Rev 00/11-01
A l l t r aden am es, t h e Dan ah er l og o, t h e N EAT l og o, an d t ag l i n e
ar e t r adem ar k s of Dan ah er Cor por at i on or i t s su bsi di ar i es. © 2001
Dan ah er Cor por at i on . A l l r i g h t s r eser ved.
Speci f i cat i on s su bj ect t o ch an g e w i t h ou t n ot i ce.
7C R AY M ON D A V EN UE • SA L EM , N H 03079
603.893.0588 • Fax : 603.893.8280
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