drive&control local - Bosch Rexroth

01 | 2011 USA
FEATURE
17
“One of the reasons we chose Rexroth …
is because of their flexibility and excellent
engineering support. We worked very well
together to design this package.”
—Liz Lind, PMC Controls Manager
Rexroth’s IndraDyn T direct
drive motor rotates the
mandrel turret through
multiple stages to create the
paper cup.
blank container sidewalls into the machine; 2) a large mandrel
turret that indexes the sidewalls through multiple wrapping,
gluing, seaming and bottom application stations; and 3) a
rimming turret for curling the top rim of the container.
The Rexroth IndraMotion MLC platform replaces mechanical
cams with digital electronic cams for each of the 18 machine
axes. It creates an operating framework that will enable
changeover from one complete tool set to another in a single
shift, much faster than cam-driven machines would allow.
IndraMotion MLC also provides a sophisticated array of
programming tools, such as Rexroth’s CamBuilder program,
to build and fine-tune electronic cams and motion sequences —
tools that gave Rexroth a critical advantage as PMC assessed
which platform to use to control its 2000S model.
Along with programming the servo controls and motion-logic,
another engineering challenge presented by the PMC 2000S
was the selection and sizing of the motors for each axis, in
particular the direct drive motors to turn the mandrel, transfer
and gripper turrets.
Rexroth’s IndraDyn T torque direct drive motors are optimized
for high torques of up to 13,800 Nm. This enables PMC to satisfy
another key requirement: stopping the machine motion within
one index when needed (e.g., if a container fails to be ejected on
the cup diverter) without harming either the machine’s
mechanical systems or the drive itself.
PMC launched its 2000S at the PackExpo 2010 conference and
tradeshow, and the machine has been undergoing successful
pilot operation at a customer operation since the launch.
Contact: Dan Throne
Email: daniel.throne@boschrexroth-us.com