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20 September, 2021

Hannover Fair 2013 exclusive show report

23 June, 2013

FLUID POWER

Atlas Copco has announced a lubricated screw compressor with a single-stage design that is said to improve performance by up to 10% compared to the previous generation. The GA250 compressor also has a 5% smaller footprint, while an energy recovery system allows heat generated by the compressor to be recovered and used elsewhere on a site.

Bosch Rexroth was demonstrating new control electronics for its latest generation of pneumatic valves (AV03) that it launched at Hannover in 2012. The AES electronics connects the valves to industrial controllers, via fieldbus or Ethernet. There are also new online tools for configuring the company’s pneumatic components, including a program that predicts future air consumption at the design stage.

Rexroth has also announced a mill-type hydraulic cylinder (above) designed and tested for two million load cycles. This will allow engineers to calculate the CDL2 cylinder’s lifecycle for an application, as well as its price performance ratio. The cylinders, for operating pressures of 160 and 250 bar, offer four mounting types and strokes of up to 3m. 

SENSORS AND MEASUREMENT

At Hannover, Balluff was demonstrating fork and angle through-beam photo-sensors (shown below) that cobine the transmitter and receiver in one housing, making them easy to align, connect and commission. The sensors need just one cable connection. The fork sensors vary in width from 5–220mm while the right-angle devices have side lengths from 40–110-mm. They include red-light, infrared and laser models.

Brüekl & Kjaer Vibro launched a new generation of eddy-current displacement sensor systems for monitoring vibrations in machinery. The Series ds821 (and an Atex version, called ds822) use a driver (oscillator/demodulator) that determines the length of the connected cable (up to 10m) automatically and adapts measurements accordingly. Previously, the choice of the driver depended on the length of the cable. The new system, with measurement ranges of 2 and 4mm, is more flexible and reduces spare parts counts.

Bender has announced a new insulation fault locator that, it says, will simplify fault location and mobile residual current measurement. The EDS195P (shown below) can be used on AC/DC control circuits from 24–230V as well as main circuits from 24–960V. Bender has also launched a condition monitor with a built-in 7-inch touchscreen for measuring current and voltage quality. The CP700 monitor communicates with Bender monitoring devices and present the information in a clear manner, generating alarms if required.

Kübler has several new ranges of encoders including absolute EtherCat encoders claimed to have the shortest bus cycle on the market. The Sendix encoders provide position updates within 62.5µs, allowing users to implement dynamic systems. They can calculate speeds internally, avoiding the need to use a controller for this.

Kübler also has two new two new 58mm-diameter CANopen optical encoders (Sendix F5868/5888) with 15mm hollow-shafts and a function that prevents errors at the end of the encoder’s physical resolution when a scaling factor is active. There is also a range of SIL2 incremental and absolute encoders that rounds off the bottom end of Kübler’s certified SIL encoders. Finally, Kübler was showing an optical fibre version of its Sendix H120 heavy-duty encoder, allowing routing of signals through electrically noisy environments.

Pepperl+Fuchs has three new families of ultrasonic sensors. The UB…F77 series packs a transmitter, receiver, transducer, indicator and a connector into a sealed enclosure the size of two sugar cubes. The UC…30GM70 series has an adjustable switching distance and a high-speed bidirectional infrared interface that adapts it to an application. The UC…30GM-IO series allows parameters to be adjusted via IO-Link without using external tools. The switching distance to be adjusted at the touch of a button.

P+F also has a compact 2D laser scanner with a 50Hz scanning rate that can perform 250,000 measurements per second – resulting in high precision and the ability to detect tiny objects or precise edges, regardless of ambient conditions, surface finishes or colours, or extraneous light sources. The R2000 scanner (above) uses 24 LEDs to create a cylindrical display of text and graphics that can be seen all around the device. The display also offers a “spirit level” function for aligning the scanner easily and quickly.




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