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| | Motion Control | Electrics challenge hydraulics and pneumatics |
 | | The forces driving a switch to electric motion control include the machine’s cost of ownership and maintainability, requirements for absolute movement accuracy, safety, and maintaining data for legal reasons if someone were to get hurt to show that the machine did what it was supposed to do. |
 | | For example, with pneumatic and hydraulic solutions, filters, line air or fluid quality, and seals have to be checked regularly. |
 | | Servo electric solutions traditionally are used for applications demanding high precision, and pneumatics are used for applications requiring a high power density and speed or applications that don’t require multiposition movements. |
| www.plantservices.com /articles/2006/056.html (846 words) |
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