Absolute encoder AC motor arrives in UK

Article Abstract:

Yaskawa's HR Series motors use the absolute encoder system, allowing them to remember position even after losing logic power. THe usual incremental system of AC motors loses position when it loses power. Yaskawa's motors require no gears, using a one count per revolution sensor and a multi-bit absolute encoder for 8192 x 4 pulses per revolution. The sensor runs off a 3V battery during power-downs. Micromech will market the range in the UK.

Innovations, Product information, Electric motors, Yaskawa Electric Manufacturing Company Ltd.

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Reading typophiles

Article Abstract:

In 1997, the Association Typographique Internationale (ATypI) held its annual conference at the University of Reading, United Kingdom. The meeting, dubbed 'Typography and Language' featured T-26's Carlos Segura, and also philosophical typographer and poet, Robert Bringhurst. A preview of the new British Library, London, was included in the agenda. The next conference is to be held in Lyons, France in October 1998.

Conferences, meetings and seminars, Printing

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Splendour in the eelgrass

Article Abstract:

Marine meadows consisting of flowering, ribbon-like seagrass plants are striking when seen from the air but are largely ignored. This is because they initially appear to be lifeless. Yet when the tides rush back to shore, the true nature of this marine habitat is exposed.

Evaluation, Aquatic plants, Seagrasses, Marine flora, Marine plants

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