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Chapter 1 Overview of the FHA-C series
Chapter 1
Overview of the FHA-C series
FHA series servo actuators provide high torque and high accuracy rotary motion. The actuators are comprised of Harmonic drive®
component from No. 17 to No.40 for precise motion control and a super-flat AC servomotors.
The first feature of the FHA series actuators is their super-flat shape. The body width is less than half of our previous models.
The second feature is a large through-hole in the center of the shaft, through which electric cables, air pipes, and even
laser beams can be passed to supply power and signals to moving parts.
The HA-655 series and th HA-675 series are dedicated servo drivers for the FHA-C series actuator to control its position and speed.
The small and intelligent driver controls the FHA-C series actuators with great accuracy and reliability.
FHA-C series actuators play an important role for driving various factory automation (FA) equipment; such as robot joints,
alignment mechanisms for semiconductor and LCD equipment, ATC of machine tools, printing machine roller, etc.
1-1 Features
• Super-flat configuration
FHA-C series actuator is the union of Harmonic drive® gearing for precise motion control with a super-flat AC servomotor.
The dimension from the coupling flange face to the actuator end is less than half the size of our previous models.
The total thickness including the output flange is 30% flatter than our previous models. The compact size allows smaller
machines to be designed.
• Through-hole shaft
The center through-hole shaft allows for the insertion of electric cables, air pipes, or laser beams through the actuator
to supply power and signals to moving parts. This feature will simplify the driven machine.
• High torque
FHA-C series actuator
outputs have a much higher torque per volume than direct drive motors owing to Harmonic drive® gearing.
FHA-C series actuators have a higher rating than our previous models
.
• High positioning accuracy
FHA-C series actuators provide superior positioning accuracy.
The FHA-25C/-32C/-40C -160 actuators achieve positioning
accuracy of 30 arc seconds (exceptionally, FHA-17C-160: 40arc seconds) as well as an encoder resolution of
1,600,000 pulses per output revolution.
.
• High torsion stiffness
FHA-C series actuators provide from 30% to 100% greater torsion stiffness when compared with the previous series.
This feature shortens positioning time and decreases the vibration during servo-lock stop.
• Optional absolute encoder
FHA-C s
eries actuators allows to select an encoder system from two kinds of encoders for detecting a position: the one is
an incremental encoder for general applications and the other is an absolute encoder (optional) for keeping its current
position data all the time, even in power failure. The complex cable for the incremental encoder saves its wires resulted
in increased reliability and simplified wiring.
In this document, INC is attached for the descriptions for the incremental system only, and ABS is for the absolute system only.
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