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Servo drives give you what you need - and no more

04 June 2009

Conventional servo drives are equipped with a multitude of high quality hardware interfaces, offer space for numerous optional expansions and work with many parameters and programming possibilities which are difficult to grasp. The user has to pay for these functions, regardless of whether he requires them or not. This is where Stober's new POSIDRIVE MDS 5000 inverter, with its modular design, is able to cut back on functions that are not required.

Why have all those terminals and a high definition analogue input when the control is digital? Why bother with an expensive resolver interface when the trend is for low-cost absolute value encoders? Why have limitless inverter functions which have no bearing on your particular application?

Taking the encoder issue as an example, Stober now offers two servomotor series, the EK and ED, that both employ inductive absolute value encoder technology from Heidenhain. These encoders – fully digitally operated – offer an attractive, low-cost, battery-free and multi-turn measuring system.

Stober also offers its POSISwitch system for applications in which a number of servo drives operate either one after another or alternately. POSISwitch allows a single servo inverter to sequentially control and position up to four independent servo axes.

Cost effective servo drive packages can be achieved by combining the low-cost ED and EK servomotors with Stober's MGS or ServoFit planetary gear units.


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