High Bandwidth Short Stroke Rotary Fast Tool Servo

Conference · Fri Aug 22 04:00:00 EDT 2003

OSTI ID:15005147

Montesanti, R C; Trumper, D L

This paper presents the design and performance of a new rotary fast tool servo (FTS) capable of developing the 40 g's tool tip acceleration required to follow a 5 micron PV sinusoidal surface at 2 kHz with a planned accuracy of 50 nm, and having a full stroke of 50 micron PV at lower frequencies. Tests with de-rated power supplies have demonstrated a closed-loop unity-gain bandwidth of 2 kHz with 20 g's tool acceleration, and we expect to achieve 40 g's with supplies providing {+-} 16 Amp to the Lorentz force actuator. The use of a fast tool servo with a diamond turning machine for producing non-axisymmetric or textured surfaces on a workpiece is well known. Our new rotary FTS was designed to specifically accommodate fabricating prescription textured surfaces on 5 mm diameter spherical target components for High Energy Density Physics experiments on the National Ignition Facility Laser (NIF).

• Research Organization: Lawrence Livermore National Lab., CA (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 15005147
• Report Number(s): UCRL-JC-155142
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
47 OTHER INSTRUMENTATION
ACCELERATION
ACCURACY
DESIGN
DIAMONDS
ENERGY DENSITY
LASERS
LORENTZ FORCE
PERFORMANCE
PHYSICS
POWER SUPPLIES
TARGETS
US NATIONAL IGNITION FACILITY