Servo control of hydraulics hasn't quite lived up to its promise in terms of widespread use of the technology. One big limitation: Its cost. In a recent Design News survey of users of hydraulics, 68% of respondents say that they would use servo if they could buy it for the same price as proportional control. Some other reasons for not servo'ing: Maintenance considerations (52%); complexity (26%); installation difficulties (19%); and filtration considerations (13%).
Most machine design engineers will survey existing component manufacturers for standard linear guide products, limiting what they can do with their designs. Using extruded aluminum profile guides can customize machine designs while shrinking the bill of materials.
Practically all electronic devices today contain metals that may
be coming from conflict-ravaged African countries. And political pressures will increasingly influence how these minerals are sourced and used in products.
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