Intro 3
Features
Return to origin not required
The direct drive actuator has a built-in absolute resolver that detects
the current position when power is turned on, eliminating bother-
some origin searches. After an emergency stop, operations are re-
started from the current position.
The direct drive actuator resolver consists of two sets -- one uses R/D con-
version to split the sine waveform detected every 2.7˚ (360˚/132) rotation
angle into 4096, and the other splits 360˚ into 4096 to detect the absolute
position on 360˚.
An origin search sensor is not needed as with the incremental method.
With this highly reliable detection, backup memory is not required because
position information is recognized when power is turned on.
Precise
High resolution of 540672 pulses per rotation
Index precision: ±15" (second), (±30" (second) for AX3000,
AX4000 Series)
Repeatability: ±5" (second) *
*1" (second) = 1˚/3600
High torque
This DD motor has outstanding torque properties that maintain
the torque even in high-speed ranges and uses a PM motor
suitable for indexing.
Space saving
With the direct drive motor, compact and space saving com-
pared to the circular table with a motor and reduction gear.
Cover (adopted for some models)
Hollow
Output shaft
Stator (coil)
Rotor (magnet)
Absolute resolver
(rpm)
Rotation
speed
(rpm)
Rotation
speed
Torque
Continuous output range
Short time rated area
Torque
PM type (permanent magnet type)
VR type (variable magnetic resistance type)
Continuous output range
Example of index accuracy measurement (with brake)
Example of index accuracy measurement (without brake)
sec.
Model No.
Load table
Moving time
Index number
Measuring
device
Heidenhein
(Germany)
AX5022
400
ROD-800
1.0 sec.
sec.
Model No.
Load table
Moving time
Index number
Measuring
device
Heidenhein
(Germany)
AX1022
250
ROD-800
1.0 sec.
Torque-rotational speed characteristics
(When motor volume is same.)
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