ROBOTICS

Technology Handbook | ROBOTICS
POSITAL Introduces Kit Encoders
for Servomotors and Rotating Equipment
KIT ENCODER
POSITAL-FRABA is introducing a new
set of component-level products that
are designed to be built into servomotors
or other types of equipment when
real-time measurements of rotational position
and/or commutation signals are required.
Based on POSITAL’s well-proven magnetic
incremental rotary encoder technology, these
new products offer manufacturers a flexible
way of building rugged and precise measurement
capabilities directly into their products.
POSITAL’s new kit solutions for machine
shaft position sensing offer a unique combination
of accuracy, reliability, cost efficiency
and low maintenance requirements. Unlike most optical motor
feedback systems, these new products provide full multiturn
position measurements without the cost and complexity
of gear-driven code-wheels or the extra maintenance requirements
imposed by backup batteries.
Proven Magnetic Sensor Technology
The new motor feedback kits use the same core technology
as POSITAL’s well-proven IXARC magnetic rotary encoders.
Key components include a compact electronics package,
built on a 35 mm diameter PCB, and a small permanent
magnet that would be mounted on the end of a motor’s shaft.
The electronics package contains four Hall-effect sensors, a
powerful 32-bit microprocessor and a POSITAL-developed
Wiegand wire system that captures electrical energy from the
rotary motion of the magnet. This energy harvesting system
powers a rotation counter so that every complete rotation of
the motor shaft is reliably recorded – regardless of whether or
not control system power is available. No backup batteries or
complex gear-trains required!
Manufacturing costs for equipment containing the new
POSITAL kit encoders are reduced since these devices
don’t require the extreme cleanliness and assembly precision
that built-in optical encoders demand. And, because
the solid-state electronics package is more tolerant of shock
and vibration than the transparent code disks and optical
sensor arrays found in optical devices, the new POSITAL
kit encoders can be relied upon to provide longer, more
12 MANUFACTURING AUTOMATION · Technology Handbook Robotics
trouble-free operating lives.
Compared to the optical incremental encoder components
used for many precision servomotors, the magnetic sensors are
much more tolerant of sensor-to-shaft alignment errors, Small
positional offsets are compensated through a built-in electronic
self-calibration capability. As a result, there is less need for highprecision
assembly techniques and specially-trained staff.
The maximum electrical resolution of these devices is 17
bits, with an accuracy of +/- 0.2 degrees. The range of the
rotation counter is over one million revolutions. The operating
temperature range is -30 to 115 degrees Celsius.
See how it all fits together.
POSITAL-FRABA Inc.
1800 East State Street, Suite 148
Hamilton, NJ 08609, USA
Phone: 609-750-8705
info@fraba.com
www.posital.com
CLICK HERE TO
LEARN MORE!
LINK TO VIDEO
ELECTROMATE
6221 Highway 7, Unit #15
Vaughan, Ontario, Canada L4H 0K8
Phone: 877-SERVO98
Email: sales@electromate.com
www.electromate.com
Innovation in Servomotor Feedback
POSITAL’s magnetic kit encoders are a rugged, versatile and easy-toinstall
alternative to resolvers and optical rotary encoders
Muilti-turn capabilities based on POSITAL’s energy-harvesing system
eliminate the need for complex gear-trains or backup batteries
Easy installation with built-in self calibration
Compact and robust design
Electrical resolution of up to 17 bits for absolute versions;
16,384 PPR for incremental models
www.posital.com