SOLUTION
Marsi Bionics selected the RLS Orbis
encoder for its ATLAS exoskeleton and
the RLS RM08 encoder for its MAK kneejoint
exoskeleton. The Orbis encoder
is a component-level absolute rotary
encoder designed for space constrained
applications: it has a through-hole design,
which enables direct mounting on the
joint motor shaft. The RM08 encoder is
a miniature high-speed rotary magnetic
encoder: it has an 8 mm diameter and is
IP68-rated for use in harsh environments.
Both encoders feature low weight and
volume to minimise inertias, a non-contact
and frictionless design to eliminate
mechanical wear, and high angular
resolution and accuracy to ensure excellent
servo performance.
“We needed encoders that met our
performance criteria without adding excess
weight and volume, as any excess in the
structure could be detrimental to the user’s
mobility and might hamper the walking
movement”, says Mr Plaza.
We needed encoders
that met our performance
criteria without adding
excess weight and
volume.
RESULTS
RLS magnetic encoders have enabled Marsi
Bionics to design and build exoskeleton
orthopaedic devices that could improve
the quality of life for people suffering from
diseases such as SMA, multiple sclerosis
and hemiplegia caused by stroke. Active
exoskeletons will particularly impact the
lives of young children, aged six and
above, who are unable to move around by
themselves.
“It is of the utmost importance to achieve
a stable movement and an exact position
of each joint of the device. For that matter,
the data collected from the encoders is
fundamental for generating the position
references. RLS and Renishaw provided us
with the best encoder feedback solutions
for our applications”, concludes Mr Plaza.
For further information on Renishaw, visit www.renishaw.com.
Issue 46 PECM 79