A high-load, two-axis ultra-accurate rate table with continuous inner-roll and outer-pitch motion, 1 ppm rate stability, ±3 P-P arcsec position accuracy, and a 50 kg UUT capacity.
Inner roll and outer pitch axes with continuous angular freedom.
Absolute optical encoders are directly mounted to the axes for very high precision positioning.
50 kg UUT capacity with a Ø790 mm hard-anodized aluminum tabletop.
ACCUDYNA controller integrated in a 36U standard console with GUI and remote interfaces.
The FDD-221-ULA parameter sheet defines a two-axis rate table with continuous inner-roll and outer-pitch angular freedom, 50 kg UUT capacity, ±3 P-P arcsec position accuracy, and 1 ppm rate stability.
The parameter sheet specifies a Ø790 mm hard-anodized aluminum tabletop, 1048 mm tabletop height from the floor, 80 / 30 Hz axis bandwidth, 115 / 637 N·m maximum torque, and ±1,500 / ±500°/s² no-load acceleration for the roll and pitch axes respectively.
The FDD-221-ULA parameter sheet defines a continuous roll-and-pitch platform with high torque, high rate capability, a large precision tabletop, and 1 ppm stability.
A highly reliable direct-drive servo system comprising a drive assembly, servo controller, and power amplifier.
Two continuous axes with an outer-axis stow lock for safe loading and unloading of the UUT.
Absolute optical encoders are directly mounted to the axes and provide very high precision positioning performance.
The parameter sheet specifies a Ø790 mm hard-anodized aluminum tabletop with a 50 kg centered UUT capacity.
Independent axis values below follow the FDD-221-ULA parameter sheet.
80 Hz bandwidth · ±1,500°/s² acceleration · 115 N·m torque
30 Hz bandwidth · ±500°/s² acceleration · 637 N·m torque
P-P on both axes · 1.5 arcsec repeatability
0.0001% over 360° interval on both axes
Control and readout functions are managed by the ACCUDYNA controller and can be configured around the customer's application. Position, rate, and acceleration may be controlled manually through the GUI or remotely through RS232/RS422 computer interfaces.
Capabilities below are drawn from the FDD-221-ULA parameter sheet rather than the mismatched chamber overview page in the supplied PDF.
Continuous inner-roll and outer-pitch angular freedom.
Centered UUT capacity with CG less than 100 mm above the tabletop.
0.0001% rate stability over a 360° interval on both axes.
±3 P-P arcsec accuracy with 1.5 arcsec repeatability.
Inner-axis range greater than ±1,500°/s under no-load conditions.
Outer-axis maximum torque of 637 N·m.
Values below follow the ACCUDYNA Version F · August 2024 catalog.
Open the supplied two-page ACCUDYNA PDF. Note that its overview page is labeled FDD-221-TCC-ULA while the parameter sheet is labeled FDD-221-ULA; this web page follows the FDD-221-ULA parameter sheet for technical values.
The FDD-221-ULA catalog lists customer-configurable communications, slip-ring, and tabletop options.
UDP via LAN up to 1 kHz
Special slip ring configurations
Custom-designed tabletops
Wide variety of slip ring capsule designs and wiring schematics
Answers are limited to information supported by the catalog.
Contact ACCUDYNA to discuss application-specific rate, positioning, loading, interface, and tabletop requirements.
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