Nano-step Controller System Occupies Single Space

Setting up a control system for servo motors often involves more than just plugging into a controller and turning on the power. There are amplifiers to consider, power supplies, and the various connecting lines that string everything together. Perhaps "closed loop" also refers to the tendency of a system to end up resembling a Cat's Cradle maneuver.

NUTEC Components, Inc., Deer Park, NY, simplifies the process of supporting servo motors with a one-box, 19-in. rack-mount solution. The DSP MICROMATIC-5 Series Servo Controllers, designed with an integral digital amplifier and power supply, support NEMA size 17 and 34 brushless linear and rotary servo motors, as well as conventional brush-type motors. Expandable up to 12 axes, power output is 1.2 kW/axis for motors drawing up to 7.5A continuous (15A peak) and 160 VDC (170 VDC peak).

The MICROMATIC-5 uses a Delta Tau Data System programmable multi-axis controller (PMAC2), with a Motorola DSP56002 for the CPU. Besides handling commands for the different axes, the PMAC2 is capable of performing as a stand-alone computer with its own stored programs. The digital servo amplifier optically isolates and digitizes motor current signals for noise-free operation. By letting the controller directly and synchronously close the current, velocity and position loops, all response-limiting delays and uncertainties associated with traditional 10V or distributed digital servo architecture are eliminated.

By commutating the phase windings of linear and rotary motors directly, the MICROMATIC-5 can achieve tighter servo loops, with steps as small as 10^-9 meters. Axes can operate independently, or may be programmed to perform circular, helical and spherical interpolation. Applications include micromachining, high-speed assembly, high-velocity dimensional inspection and semiconductor manufacturing.

--RM

For more information:

Circle 555 - NUTEC Components, Inc., or connect directly to their website via the Online Reader Service Program at http://www.1rs.com/004df-555