Nippon Pulse, now a part of Mabuchi Motor, has added a new option to its line of linear servo motors -– an integrated analog Hall effect feedback element built into the forcer to save space and provide exceptional repeatability for positioning and conveyance applications. Integrating the analog Hall effects into the motor forcer eliminates the need for an external linear encoder; instead, the magnet poles within the shaft can be detected by the sensors, effectively becoming its own integral sine/cosine encoder.
Nippon Pulse calls linear servo motors and actuators “the secret weapon OEM engineers don’t know they have.” They are a permanent-magnet-based technology to generate linear motion in one axis. They are relatively simple to build, design and integrate, and their extremely high reliability and increasing power density make them excel in an array of automated machines.
The new option makes the motors ideal for applications with space limitations, as eliminating an external encoder allows for a smaller system footprint and a reduction in parts and their associated costs. The output of the analog hall feedback is a sin/cos signal, +/- 1v pk to pk, 2.5 vdc offset, 90 degree phasing. This output used with a servo drive with internal interpolation capabilities can provide resolutions as low as 1 um. In addition, an A quad B digital pulse output is also available with integral interpolation to provide similar high resolutions. The new option availablise for the 6, 10, 16 and 25mm sized forcers.
If the environment is dirty, dusty or wet – which can render an external encoder inefficient or unusable – the analog Halls option will continue to provide feedback in these types of harsh environments, where typical encoders will fail.
Nippon Pulse offers the S series (standard air gap), L series (large air gap) and the SX series (standard with high-energy magnets). Any of its standard products can be modified for volume OEM applications.
In January, Nippon Pulse Motor became part of Mabuchi Motor Co., Ltd., headquartered in Matsudo City, Japan and a global leader in small precision motors for automotive, consumer and industrial applications. The acquisition combines the strengths of Nippon Pulse in serving medical, life sciences and automation markets with precision motion control and linear motor technology, and Mabuchi’s scale and manufacturing capability. For more info, see www.nipponpulse.com and www.mabuchi.com.
