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Arcomet, a construction crane manufacturing and rental company, has chosen a Control Techniques crane control system for its new generation of rapid-assembly cranes to provide improved flexibility, safety and comfort and to deliver significant energy savings.

Arcomet uses the T33, A33, A40 and A45 Eco City cranes. Each rapid-assembly crane has been fitted with three electric motors and three drives: a lifting motor controlled by a 15kW Unidrive SP, an aligning motor controlled by a 7.5kW Unidrive SP and a turning motor controlled by a 4kW SKC Commander. 

Benefits of improving the operation of the cranes have included quiet start-up with high torque without current spikes, smooth movement, intelligent and precise positioning with counter steering during lifting and aligning movements and controlled lifting and aligning functions.

Rapid-assembly cranes are usually used in the construction of houses, flats and office buildings. They are often installed on small building sites with restricted assembly space and they have limited power. Therefore, they must be compact and they must be able to be assembled and dismantled by as few people as possible.

Key benefits of product application

  • The system allows deployment at the touch of a button, precise positioning with millimetre accuracy, sway dampening, optimum use of load curves by working at maximum speed for any given weight and automatic compensation for supply current variations.
  • Power restrictions at 20kVA on the A30 and A40 ranges allow easy start-up via a generator or mains network.
  • The speed adjustment feature uses variable rotation speed motors to achieve considerable energy savings.
  • The braking effect of the damping winding device on the motor ensures that the crane driver feels in perfect control of the movement of the load at all times.
  • Crane drivers are able to counter-steer with a function that enables them to set down the load quickly and correctly without any sway. 
  • According to a senior engineer at Arcomet, the increased functionality of the cranes is highly appreciated by building contractors.

Control Techniques

Control Techniques, an Emerson Industrial Automation company, is a world leader in the design, production and marketing of electronic variable speed drives for the control of electric motors. Our strategy is to concentrate on delivering drives and servo products that enhance the productivity of our customers’ machines and processes.

We operate through a global network of drive and application centres that both distribute product and add value by building our drive products into custom designed systems and by offering the highest levels of customer service.

Our Control Techniques drive centres also provide us with invaluable feedback and market intelligence so that we can further improve our products and service. This customer focused strategy will enable us to continue to grow profitably.

Our competitive edge is based on our unique focus on drives, our strength in research and development, our investment low-cost manufacturing and an effective worldwide marketing strategy.

Emerson Industrial Automation, a business of Emerson, is a global technology provider that enables productivity, efficiency and quality gains for customers across a spectrum of industries. Our products include alternators, electric motors and drives, electrical distribution devices and mechanical power transmission, fluid automation and ultrasonic joining solutions. Visit our website for more details.

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