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Wednesday, August 15, 2018
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Updates on the linear drive

Linear motor, electric motor, ball screw, ball screw, electric cylinders

iaitechnical articles

IAI provides the advantages of modern electric cylinder over pneumatic actuators by means of the "Robo Cylinder" product line is: you are not vulnerable to load variations, allowing smooth, starting and stopping, simple speed regulation and the control of a variety of positions with the highest repeatability.

Also, for cost and environmental reasons electric cylinder of a modern, sustainable production can not do without. They save energy and contribute simultaneously to a "green" image for the manufacturing companies.

The Company has determined the energy consumption for a compressed air cylinder and a parallel electric cylinder (Robo Cylinder) and compared. The comparison took place under identical conditions with the same parameters: dwell time, energy cost per unit, compressed air unit cost, speed, payload, stroke length, ambient temperature and operating time. The costs were calculated it based on a current price of industrial 0,1 euros per kWh provided uninterrupted service and a powerful compressor. It was found that even small leaks can cause significant costs. A leakage hole of sixteenth inch (1,6 mm) followed by annual fees caused by 688 euros, twice as large a leak (3,2 mm) already 2750 euros, while a hole of only ¼ inch (6,4 mm), an entity even the proud amount can cost from 11.000 euros per year.

Even without a visible hole leaks can - even if they are only the size of a pinprick - the energy bill generally fast always upward. These leaks can be a not to be underestimated cause of wasted energy in an industrial use of air conditioning, and in some cases the loss of up to 20 to 30% of the compressor power. If the air pressure drops due to leakage in the system, pneumatically driven machines work less efficiently - the production costs often rise dramatically.IAI2

Solution: Electric Cylinders

With electric cylinders can these expensive losses of the past. The electric cylinders are characterized by an easy-to-use software and offer all the benefits of a high quality electric axis. Your effective efficiency achieved 80 to 90%, while the overall efficiency of a typical pneumatic system is only about 10%.

When the cycle frequency increases, the energy demand of a pneumatic cylinder to linear, while the power consumption of the energy efficient RoboCylindern remains constant. Hence the difference in energy consumption by the number of cycles per minute is increasing. If both cylinders 10 work cycles per minute, only claims a Robo Cylinder 1 / 3 the energy of the pneumatic cylinder. Working with both cylinders 30 cycles per minute, the difference is even more pronounced: The Robo Cylinder requires only one-tenth the energy of the pneumatic cylinder. Thus provide a fast electric cylinder amortizing investment with comparatively high savings represent

But also in the accuracy and in the programmable options electric cylinders are well ahead, as some examples show that the RoboCylinder allow multi-point positioning on 500 various positions with a high accuracy of ± 0,02 mm. So with only a single production line, a plurality of different products can be produced.

The force (thrust), exerted by the electric cylinders can be precisely controlled by a simple adaptation of the position values. In this way, a constant pressure is possible. This feature is interesting when pushing, terminals, recognition, compression fitting or clamping workpieces - and results in a higher production quality.

Both speed and acceleration and deceleration can be programmed exactly RoboCylinder for each position. This improves the cycle time can reduce damage to the workpieces and drastically increase the product quality.

Useful warning

Robo Cylinder reached a certain, pre-set portion, an outgoing signal without additional sensors are automatically generated. The output of such a (warning) signal may be useful and necessary for different applications. Since no other sensors are needed for saving the extra investment for sensors as well as for their maintenance and operation.

Unlike pneumatic systems can Robo Cylinder stopping a carriage at any point and decelerate to a stop when they receive an external signal during operation. Thus, for example, collisions are avoided.

In the continuous process with a fixed distance repeated motion on the basis of data from a single location is possible. Working with a single position record without input of many individual items simplifies the programming effort considerably. A desired, fixed distance can be entered quickly into position data table.

The ROBO Cylinder DC stepper motor series ERC2 / RCP2 stop immediately and do not generate micro vibrations such as in conventional AC servo motor drives. Therefore, they are suitable for example for measuring systems with cameras.

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