NSK MEGATORQUE M-ESA-J0002V25, Руководство пользователя

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Universal Interface
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Because of the extreme versatility of the Driver Unit design, a wide variety of interface methods
are possible. The Megatorque Motor System can be interfaced to virtually any control system. It is
very easy to control the Megatorque Motor System with a CNC, a servo motor controller, a robot
controller, or an indexing controller. You can operate the Megatorque Motor System with a stepper
motor controller or with a personal computer or dumb terminal. Versatile position control can even
be implemented with a single switch!
High Repeatability
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With zero backlash, direct drive and a 614 400count/rev resolver, the Megatorque Motor System
offers repeatability as high as approximately 2.1”, or approximately 0.00058°. With no mechanical
contact or moving parts other than the bearing, this repeatability will never degrade.
Easy to Maintain
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With all adjustments, indicators, and test points accessible by the front panel, service or
maintenance is easy. LED (light-emitting diode) and logic diagnostic outputs identify the nature of
any error condition quickly and accurately.
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Together, the Motor and the Driver Unit provide the ultimate in simplicity for precise and reliable
motion control.
Single Component Servo System
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A conventional brushless servo system requires at least several separate components which must
be selected and packaged together, often at great expense. Furthermore, many of these
components introduce problems of their own to degrade the entire system’s performance. Gears
and flexible couplings, for example, introduce mechanical irregularities such as windup, backlash,
and mechanical inaccuracy. The same functions can be accomplished with just two components
using the Megatorque Motor System; all of the circuits needed to implement a position or velocity
control servo loop (digital motion controller, servo compensation, brushless commutation logic,
power amplifier) are included in the Driver Unit, and all of the mechanical components that were
required (motor, couplings, gears, bearings, tachometer and encoder) are either replaced or made
unnecessary by the Motor.
Gearless Advantage
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There are many advantages to the gearless servo system. One advantage is to eliminate backlash,
the angular play due to looseness of fit between two mating gears. The direct drive inherently
eliminates backlash, so that repeatability is limited only by the resolution of the position sensor. The
direct drive permits direct coupling of the Motor and the load, so that troublesome flexible couplings
are not required. This permits tighter, more direct control of the load. The Megatorque Motor
System has a very high torque to inertia ratio, so that very high acceleration rates can be achieved.
When the load inertia is low, the Motor can accelerate a load as much as 10 times faster than
comparable high performance servo systems using gears. The performance advantages of the
Megatorque Motor System are demonstrated by many of the new class of the direct drive robots
which have established repeatability and speed records in the robot industry and are the
performance standards against which other robot systems are compared.
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