Rotary Table
Rotary electric actuators feature a rotating worktable positioned above an enclosure for the motor and drivetrain. Three different motor/table sizes are available, with each size offering a basic and high torque variation. Additionally, each size offers four rotating angle options, including 90°, 180°, 310 / 320°, and continuously rotating.
LER Rotary Table, Incremental Encoder
The original LER is capable of 90°, 180°, or 310 / 320° rotation from the home position. Suitable applications will require a repetitive rotate-and-return motion, such as parts transfer with reorientation.
LER, Electric Rotary Table, Continuous Rotation
LER is capable of continuous rotation of up to 360° from the home position. Suitable applications will require a repetitive rotate-and-return motion, such as parts transfer with reorientation.
LER Rotary Table, Battery-less Absolute Encoder
The LER features a rotating worktable positioned above an enclosure for the motor and drive train. Both a basic and high torque variation are offered. Three rotation angles are also available, including 90°, 180°, or 320°. This version includes a 24VDC motor with a battery-less absolute encoder. This encoder allows the actuator to be powered down without losing its positional awareness. The machine's PLC can access the controller's operational and positional step data through several fieldbus protocols, IO-Link, or parallel I/O.
Rotary Table FAQs
What is the maximum rotation angle for the LER series continuous rotation model?
The LER continuous rotation model is designed for a 360° rotation angle. However, the angle setting range can be configured up to +9,999,999.99° using relative operation.
What types of motor and control systems are used in this series?
These actuators use a 24 VDC step motor. They are compatible with the LECP6 series step data input type controller, which allows for 64-point positioning.
How does the high torque model compare to the basic model in terms of rotating torque?
The maximum rotating torque depends on the actuator size and type:
- Size 10: 0.22 N·m (Basic) vs. 0.32 N·m (High Torque).
- Size 30: 0.8 N·m (Basic) vs. 1.2 N·m (High Torque).
- Size 50: 6.6 N·m (Basic) vs. 10 N·m (High Torque).
What are the speed and acceleration capabilities of these rotary tables?
The actuators offer high-speed, shock-less actuation with a maximum speed of 420°/sec and a maximum acceleration/deceleration of 3,000°/sec².
What is the difference in deflection accuracy between the basic and high precision types?
- The high precision type significantly reduces table deflection:
- Basic Type: 0.1 mm deflection on the top and external surface.
- High Precision Type: 0.03 mm deflection on the top and external surface.
Can these rotary tables be used for clamping operations?
Yes, they support pushing operations for clamping or stopping against an external object. When using this mode, it is recommended to set the pushing start position at least 1° away from the workpiece to avoid alarms like Posn failed or Deviation overflow.
What should be done if the actuator needs to be operated without power?
The units are equipped with manual override screws on both sides of the body, allowing for manual rotation when not energized.
What factors must be considered during model selection?
Proper selection requires checking the moment of inertia, effective torque (based on load type), and allowable loads (radial, thrust, and moment). SMC provides specific graphs to confirm if the intended angular speed and acceleration are within the actuator's limits.
How does cable length affect the actuator's performance?
Speed and torque may decrease if the cable length exceeds 5 meters. Specifically, performance can decrease by up to 10% for every 5 meters of additional cable (e.g., a 20% reduction at 15 meters).