All-Electric Tube Bender Uses Rexroth Motors And Controls .
01 October 2002
The impressive new EB76 tube-bending machine from Plymouth based Eurobend
is an all-electric unit, which uses servomotors and servomotor driven
ball screw drives rather than hydraulic rams and actuators to achieve
cleaner, more efficient and accurate operation. The motion control
solution was provided by Rexroth's Electric Drives & Controls division,
based in Cirencester, and comprises a type 2AD asynchronous motor for the
bending axis, type MKD synchronous motors of various sizes driving the
remaining nine axes (mostly via gearboxes) and type DKC02 servo
A key feature of the Rexroth motors is their built-in absolute encoder,
which provides precise position information on power-up or when power is
restored following a power outage. The motors are linked to their servo
amplifiers, which are housed in a separate enclosure. The DKC02 units are
equipped with Sercos interfaces allowing features such as advanced
diagnostics and facilitating plug-and-play interconnection with products
from other suppliers (Eurobend uses Beckhoff PC based motion controllers
on its machines).
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