Electric Actuators – Actuators with Battery-less Absolute Encoders
SMC has introduced a line of actuators driven by 24VDC step motors fitted with battery-less absolute encoders. An absolute encoder offers position data upon power-on, avoiding the homing routine an incremental encoder requires. Our battery-less absolute encoder pairs orientation sensors with differently sized rotating wheels to enable position detection. This electro-mechanical design eliminates the battery and its accompanying import and disposal restrictions common to traditional absolute encoders. A battery-less solution is also free of memory retention limits from extended power-off situations.
LEFS Slider, Ball Screw Drive, Battery-less Absolute Encoder
The rodless LEFS slider is an electric actuator with a load mounting platform situated above a ball screw drive. A flexible seal band permits platform travel while preventing foreign matter from entering the drive. Slider advantages include a low profile height, shorter length than a rod with equivalent stroke, and better positioning repeatability than a belt driven slider. 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.
- Body sizes: 25, 32, 40
- Maximum work load: 65 kg
- Maximum speed: 1200 mm/s
- Stroke range: 50 to 1200mm in 50mm increments
- Positioning repeatability: ±0.02mm, or ±0.015mm (high precision)
LEFB Belt Drive Slider, Battery-less Absolute Encoder
The rodless LEFB slider is an electric actuator with a load mounting platform situated above a belt drive. A flexible seal band permits platform travel while preventing foreign matter from entering the drive. Slider advantages include a low profile height, shorter length than a rod with equivalent stroke, plus longer strokes and higher speeds than a ball screw driven slider. 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.
- Body sizes: 16, 25, 32
- Maximum work load (horizontal only): 19 kg
- Maximum speed: 1500 mm/s
- Stroke range: 300 to 2000mm in 100mm increments
- Positioning repeatability: ±0.08mm
LEKFS High Rigidity Slider, Ball Screw Drive, Battery-less Absolute Encoder
The rodless LEKFS slider is an electric actuator with a load mounting platform situated above a ball screw drive. A flexible seal band permits platform travel while preventing foreign matter from entering the drive. Slider advantages include a low profile height, shorter length than a rod with equivalent stroke, and better positioning repeatability than a blt driven slider. LEKFS includes a redesigned guide with 4 rows of steel balls instead of 2, improving both allowable moment rigidity and positioning repeatability. Additional enhancements vs. the LEFS include auto switch mounting grooves, improved dustproof performance with magnetic seal band adhesion, standard positioning pin holes and drop-in upgrade replacement vs. LEFS. The LEKFS also features 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.
- Body sizes: 25, 32, 40
- Maximum work load: 65 kg
- Maximum speed: 1200 mm/s
- Stroke range: 100 to 600mm in 100mm increments
- Positioning repeatability: ±0.01mm, or ±0.02mm (high speed screw lead)
- Dynamic allowable moment: 8-61% improved vs. LEFS (size and axis dependent)
LEY Rod, Battery-less Absolute Encoder
The LEY rod electric actuator is suitable for push, pull, lift and press applications. The motor orientation can be reverse mounted on top for compact length, or inline for compact height. Several mounting options are available to accommodate a range of machine requirements. 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.
- Body sizes: 16, 25, 32, 40
- Maximum work load: 90 kg (horizontal); 53 kg (vertical)
- Maximum pushing force: 1058 N
- Maximum speed 500 mm/s
- Maximum stroke: 500mm
- Positioning repeatability: ±0.02mm
LEY-X8, Battery-less Absolute Encoder, Dust-proof Water-jet-proof IP67
The X8 option is a dust-proof and water-jet-proof specification equivalent to IP67. This spec is achieved with the addition of several unique features above the standard LEY. The motor is sealed within an aluminum cover, fitted with M-type metal cable connectors. The rod passes through a scraper and employs a lubrication retainer to prevent oil film washout. Futher, grease supply holes are also provided. The body extrusion includes a vent hole and fitting to balance internal pressure so that dust and water are not drawn in. The 24VDC motor includes a battery-less absolute encoder. This encoder allows the actuator to be powered down without losing its positional awareness. The controllers's operational and positional step data can be accessed through several fieldbus protocols, IO-Link, or parallel I/O. Available in body sizes 25, 32, and 40.
- Same load and performance as standard LEY
- IP67 environmental protection rating
- Sealed aluminum motor cover with metal cable connectors
- Rod scraper with lube retainer
- Grease supply holes
- Body vent hole
LEYG Guided Rod, Battery-less Absolute Encoder
The LEYG guided rod electric actuator pairs a LEY actuator with a bolt-on bearing block with double guide rods. The guide rods counter rotational forces instead of the drive and motor, and also resist shock and sustained lateral loads. Guide selection offers either slide or ball bushing bearings. The motor orientation can be reverse mounted on top for compact length, or inline for compact height. 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.
- Body sizes: 16, 25, 32, 40
- Maximum work load: 90 kg (horizontal; 51 kg (vertical)
- Maximum pushing force: 1058 N
- Maximum speed: 500 mm/s
- Maximum stroke: 300mm
- Positioning repeatability: ±0.02mm
LES Slide Table, Compact, Battery-less Absolute Encoder
The LES electric actuator combines a motor and ball screw drive, worktable, and linear guide in compact body. The formed sheet metal table allows a lower mounting surface height, lighter weight, and greater vertical work load than the LESH slide table. Body orientations include basic, symmetrical, and inline mounted motor. 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.
- Body size: 25
- Maximum work load: 5 kg (horizontal or vertical)
- Maximum pushing force: 180 N
- Maximum speed: 400 mm/s
- Strokes: 30, 50, 75, 100, 125, 150mm
- Positioning repeatability: ±0.05mm
LESH Slide Table, High Rigidity, Battery-less Absolute Encoder
The LESH electric actuator combines a motor and ball screw drive, worktable, and linear guide in compact body. The machined table is more rigid than the LES formed table, enabling higher horizontal loads and improved deflection from offset loading. Body orientations include basic, symmetrical, and inline mounted motor. 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.
- Body size: 25
- Maximum work load: 9 kg (horizontal), 4 kg (vertical)
- Maximum pushing force: 180 N
- Maximum speed: 400 mm/s
- Strokes: 50, 100, 150
- Positioning repeatability: ±0.05mm
LESYH, Electric Slide Table, High Precision Type, Battery-less
The LESYH is a high precision variation of the LESH high rigidity slide table. This actuator improves positioning repeatability to ± 0.01 and increases vertical work load dramatically compard to the LESH. The external motor can be mounted inline with the table, or in parallel to the left or right. This version includes a 24VDC step 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.
- Body size: 8, 16, 25
- Strokes: 50, 75, 100 or 150mm
- Maximum work load: 12 kg (horizontal, 20 kg (vertical))
- Maximum pushing force: 420 N
- Maximum speed: 400 mm/s
- Positioning repeatability: ±0.01mm
LEHF Gripper, Battery-less Absolute Encoder
The LEHF gripper uses a belt driven slide shaft to open and close the fingers. The low profile, flat fingers follow a linear guide for alignment and stability. The body and drive construction permit long strokes, suitable for gripping larger items without excessive moment loading. 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.
- Body sizes: 32, 40
- Stroke range: 32 or 40mm (basic); 64 or 80mm (long)
- Gripping force range: 48 to 180 N
- Repeatability: ±0.05
- Low profile fingers
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.
- Body size: 50
- Rotation angles: 320°, 90° or 180° (external stopper)
- Maximum torque: 6.6 N?m (basic), 10 N?m (high)
- Positioning repeatability: ±0.05° (±0.01° at end with external stopper)
- Backlash: ±0.5°