Lenze PositionServo drives join in with the Ethernet revolution

Published: 16 May 2008  12:00 AM
Source: The Engineer

Joining the rise of Ethernet as a simple, multi-platform factory communications protocol, Lenze-AC Tech has launched the latest generation of its PositionServo drive with full Ethernet connectivity as standard. PositionServo is a powerful but ‘simple’ introduction to a good quality reliable servo controller without the usual cost and complexity normally associated with servo automation solutions.
 
Open standards and the proliferation of PC control in factory automation means that the new PositionServo is now fully compatible with what is becoming the least-cost solution for many applications. There are two models available, the 940 designed for Encoder feedback and the 941 intended for Resolver feedback.
 
From basic torque and velocity control to fully programmable coordinated motion, the user can choose the level of control. As a distributed drive/control solution, PositionServo can be used without an external PLC, avoiding the additional cost of a separate controller and all the cables and connections required. By putting the power of the motion controller in the same package as the drive, with 17 programmable I/O points, machine control becomes easy with one packaged solution.
 
 “The fundamentals of this product are to bring simplicity to servo technology, with PositionServo it is far easier to program precise motion profiles, and integrate low-cost yet high-resolution control into positioning systems,” comments Wayne Morris, International Sales Manager (Asia & South America).
 
Morris adds “These drives suit both centralized and decentralized applications and use a BASIC-like motion-programming language, to provide precise indexing and positioning, while also accepting analogue as well as digital drive signals from motion controllers via Ethernet, RS-485, ModBus, CANopen and Profibus are options.”
 
MotionView, Windows based programming software is shipped free in the box with each drive. MotionView is easy-to-use with few parameters, preconfigured motors and an auto-tune option.
 
PositionServo drives currently range from 2 to 18A output (up to 54A peak) and can replace complex mechanical systems, such as line shafts and cams, clutches and brakes, pneumatic and hydraulic cylinders. Typically the servo system will increase machine speed, accuracy and flexibility, whilst reducing build, maintenance and changeover times.
 
Programming using the removable EPM chip is also a standout feature of the product. A shared technology with the company’s AC drives range and holding the entire drive and motor configuration, the EPM chip is simply plugged by hand into the front of the drive. In the case of PositionServo models, it even holds the motion program.
 
With the EPM, servo control parameters and motion programs need only to be configured once, and can then be transferred to other PositionServo controllers without having power applied to them. Program transfer from one EPM to another is made easy by the EPM programmer, a handheld battery powered unit.
 
PositionServo drives are available for machines with either single or three phase supplies at nominal Voltages of 240V, with an optional integrated EMC filter, and 400V. An innovative Voltage doubler feature also allows inputs at 110V single phase to operate with 240V motors.

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