ETS-Lindgren 2188 Turntable - Manual (Page 7)

Model 2188 Turntable
©ETS-Lindgren—January, 2006
Rev. B—P#399771
7
1. Introduction
The ETS-Lindgren Model 2188 is an electric-powered, variable-speed
turntable platform system designed for use with an EMCO Model 2090
series positioning controller to perform EMI compliance testing. The Model
2188 is available in 1.2-meter, 1.5-meter and 2.0-meter diameters. The
turntable is ideal for installations in new or existing test locations where pit
excavation is not an option or must be shallow.
The top of the turntable is conductive with a continuous ground brush to
electrically couple it to the ground plane. The ground brushes are attached
directly to the chamber floor via the floor flange and are in continuous
contact with the turntable top. The brushes point downward from the floor
flange. .
The drive motor and gearing are located beneath the platform. The Model
2188 turntable is powered by an electric motor through a worm gear box
with a chain and sprocket final drive. The top of the turntable is removable
to provide easy access in the event that service is required. The
electronics are located in a shielded enclosure. Signal I/O is via fiber-optic
cable.
To prevent over-travel of the turntable in either direction of movement,
“hard” limits are provided in the form of pins that actuate switches located
below the tabletop. These pins allow limits to be set and allow as much as
two full rotations. Rotation speed can be varied from the front panel of the
controller or through the IEEE-488 interface bus.
1.1. Standard Configuration
• Turntable Assembly
• Single-phase electric drive (208-230 VAC 50/60 Hz)
• Variable speed drive
• Conductive top
• Continuous rotation
• One (1) ten meter fiber-optic control cable
• Fiber optic shield penetration kit
• Two (2) fiber optic feed-thrus
• One (1) three meter fiber optic control cable