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Yaskawa Sigma 2 and Sigma 5 servo motors and drives are now available from Micromech.

The Sigma 5 is a servo pack consisting of servo motors, servo amplifiers and a set-up tool.

It covers demands with regard to compact size, high dynamics, high efficiency, low maintenance and reliability.

In addition, the auto-tuning function has been optimised for the most sophisticated applications.

For example, the auto-tuning algorithm allows the set-up of two axes in high-performance machines in less than two hours, compared to eight hours or longer for other products.

The effects of a motor load can be simulated in the servo amplifier using a mathematical model that is part of the new control algorithm.

This allows the complete motion control system to be tested before connecting the motor and means electrical engineers do not have to wait for the mechanical engineers to finish the machine.

Five different algorithms are incorporated to counter different forms of vibration at frequencies from 50Hz to 5kHz and above, which results in quieter, more reliable operation, with improved productivity.

Other characteristics of the Sigma 5 include an operating temperature range of 0-55C without de-rating, the ability to handle 350 per cent torque overloads for 3-5s and an increase in surface cutting accuracy in machining applications to one micron.

Features of Sigma 5, such as precise and fast positioning, high machine speed, non-vibratory motion, smooth running at lowest speed, make them suitable for machines in the fields of electronics, semiconductors, packaging, printing and machine tools.

The are also suitable for the injection moulding and metal forming industries, where high throughput and point-to-point positioning are decisive factors.

As well as servo amplifiers, the system includes new ranges of rotary, direct-drive and linear motors.

The rotary motors, initially covering ratings from 0.1-15kW, have 30 per cent fewer components, weigh 20 per cent less and are 30 per cent shorter than previous models.

They have new stator and winding designs, allowing smaller machines to be used in many applications, and cutting energy consumption by up to 30 per cent.

There is a 20-bit incremental serial encoder for the latest range, which provides more than one million information points per revolution.

There is also new coupling to link the encoder to the motor, which doubles vibration resistance to 5G compared to previous versions.

The encoder has a five-year battery life.

The Sigma 2 range has upgraded control algorithms for enhanced control, such as the model follow-up control and the vibration suppression control.

Position settling time is reduced to a third of conventional models even if a machine is not rigid.

Rapid response is achieved with one-third of the settling time due to half CPU operation time and upgraded control algorithms.

Its flange is designed as IEC72 and the highest speed available is 6,000min-1.

High-resolution serial encoder and d-q current vector control improve positioning speed and torque control accuracy.

For easy setup and maintenance, online auto tuning is available, which adjusts machine characteristics and sets servo gains.

An electronic nameplate enables quick motor parameter setting.

Standard braking resistor connection terminals ease connection.

A built-in parameter-setting device enables direct parameter input and the alarm trace-back function enables easy maintenance.

Option board attachments respond to expanding needs by just attaching one to the side of the servo pack to link it to a motion controller or to perform precise positioning.

Option boards for Mechatrolink and full closed link I/F are available.

Fieldbus links for Sercos, Profibus, Canopen, Devicenet, among others, are available as option boards to improve network adaptability.

These servos comply with international standards (CE and UL/cUL) and the motors are recognised for providing environmental resistance with a protective enclosure complying with IP55 standard (Type SGMAH) and enhanced vibration resistance.

Micromech

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