Electromechanic servo drive systems replace hydraulics

Tecalex is replacing more and more the formerly used hydraulic drives by servo-electric drives in its new aluminium extrusion equipment.

Especially the press feeding (read more …) and flying puller systems (read more …)based on servo drives are becoming a standard among Tecalex customers.

There are three main advantages to servo drive technology in aluminium profile extrusion.

Servo drive systems allow for precise movement cycles with each cycle having its own speed and acceleration parameters which leads to low dead cycle times at very high precision.

A key advantage of servo drives used in Tecalex machine manufacturing is the advanced suite of drive-integrated safety functions. These have been certified in compliance with the latest EN ISO and IEC industry standards.

Another main advantage of servo drive systems over commonly used hydraulic systems is higher process speed and precision. Servo systems are much more compact than hydraulic ones. The noise level of servo systems is much lower compared to hydraulics.

Servo motor press feeding equipment usually has a better return on investment (ROI) than other lower cost drive devices including standard AC motors or hydraulic drives. This can be explained by the fact that ROI is considering  the full life cycle of the production equipment including the initial capital cost, increase of the production rate & quality, reduction of material waste, product repair, scrap & production returns, downtime, spare parts and lower maintenance cost.

Jaume Amoros, technical manager at Tecalex, says: “The aluminium extrusion press feeding and flying puller operation is now performed with maximum accuracy. A precise synchronisation of the movements is very important here. Interruptions or irregularities in the procedure have to be avoided since there is otherwise a risk that the uptime of the system will be reduced.”

These requirements are met with state-of-the-art servo drive systems.

The high precision and very good controllability of the process are only two of the numerous advantages offered by the new drive concept. Another important point is the energy saving of servo drive systems.

In addition, the machines take up less space. The service work can be reduced because there are no control valves and other high-maintenance components. The working temperatures are more constant because no additional heat is produced by the hydraulic system, something that also benefits precision. Working without hydraulic oil is a further positive aspect from the point of view of the customers. What’s more, the noise level is much lower, which keeps the operating personnel happy. As Jaume Amoros explains: “The hydraulic systems are just below the 75 dB limit whereas the servo systems are very quiet.”

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