EAO Ltd has announced the availability of advanced motion control solutions for automation, robotics, conveyor and packaging equipment, designed to deliver the high levels of accuracy now demanded by the latest generation of industrial applications. Building on
Sanyo Denki’s reputation for precision engineering, the new DB31 Series Stepper Motors are fully integrated motor-and-driver assemblies, offering strong performance within a compact 56mm square footprint.
The latest addition to Sanyo Denki’s Sanmotion portfolio, the DB31 Series combines a high-performance stepper motor with an integrated driver to ensure precise and repeatable movement within the rated torque range, irrespective of load. The units have been vibration tested between 10Hz and 2000Hz across all axes and incorporate protective features including main circuit voltage monitoring, fuse protection and CPU fault detection, supporting reliable operation in demanding environments.
The integrated driver supports a range of standard commands, including positioning, continuous rotation and homing, while enabling users to configure parameters such as position, speed, acceleration and command selection for straightforward commissioning and optimisation.
To improve motion smoothness and reduce mechanical shock, the DB31 Series incorporates two S-curve acceleration and deceleration profiles. One provides gradual peak acceleration between 25% and 75% of the motion cycle, achieving up to 1.25 times the acceleration of linear ramps, while the other reaches peak acceleration at the midpoint, delivering up to 1.9 times that of conventional linear profiles. These options help to minimise vibration and mechanical stress during speed changes.
With an input specification of 24VDC ±10% at 2A, the range offers holding torque of 0.14Nm in the DB31F561S model, with dimensions of 56mm by 76mm, and 0.24Nm in the DB31F562S-50 model, measuring 56mm by 88mm. Communication is via RS485 at 38400bps, supporting up to 16 axes, while control is achieved through an open-loop system with 1/8 micro-stepping. The units also provide five photocoupler inputs for functions such as limits, homing, rotation direction and emergency stop, along with two photocoupler outputs for operating and alarm signals.
Commenting on the design, Robert Davies, marketing manager at EAO Ltd, said the integration of the motor and driver into a single unit offers both practical and performance benefits: “As DB31 Series Stepper Motors allow direct connection of limit sensors and homing signals, control of power and communication can be achieved with as few as five connections, reducing internal wiring and simplifying equipment design.”