Integrated Stepper Motors
Liberty MDrive®
Liberty MDrive® LMD23 NEMA 23 Pulse/direction External Linear Actuator with M12 Connectors
Compact integrated motor with RS-422/485 communications interface. Feedback options include open or closed loop with hMTechnology.
- Motor size: NEMA 23 (57 mm)
- Input voltage: +12 to +60 VDC
General Specifications
| Specification | Value |
|---|---|
| Control Type | Pulse/direction input |
| Communications Interface | RS-422/485 |
| Communications Features | MCode OS |
| NEMA Size | 23 (57 mm) |
| Torque Range | 103 … 242 oz-in (73 … 171 N-cm) |
| Heatsink Operating Temperature | 85°C |
| Motor Operating Temperature | 100°C |
| IP Rating | IP65 |
Electrical Specifications
| Specification | Value |
|---|---|
| Input Voltage | +12 … +60 VDC |
| Power Supply Current Requirement | 3.5 A |
I/O Specifications
| Specification | Value |
|---|---|
| Signal Inputs: +5 to +24 VDC | |
| Voltage Range | 5 … 24 VDC |
| Input Current @ +5 VDC | 8.7 mA |
| Input Current @ +24 VDC | 14.6 mA |
| Pulse (Step) | 2.56 MHz |
| Quadrature | 1.25 MHz |
| Enable | 5 kHz |
| Isolation | Galvanic |
| Protection Class | III |
| Analog Input | |
| Voltage Mode | 0 … 10 VDC |
| Current Loop Mode | 0 … 20 mA |
| Resolution | 12 bits |
| Isolation | None |
| Signal Outputs: 1 – 5.5 mA | |
| Voltage Open-Collector | 60 VDC |
| Voltage Open-Emitter | 7 VDC |
| Current Open-Collector | 5.5 mA |
| Current Open-Emitter | 5.5 mA |
| Isolation | Galvanic |
Motion Specifications
| Specification | Value |
|---|---|
| Open Loop (No encoder or hMT/Encoder Functions Off) | |
| Microstep Resolution (# of Settings) | 20 |
| Microstep Range | 200 … 51200 steps/rev |
| Counter Type | 32-bit Position |
| Counter Edge Rate | 5 MHz (max.) |
| Velocity Range | ±2560000 steps/sec, ±3000 RPM |
| Velocity Resolution | 0.5961 steps/sec |
| Accel/Decel Range | 1.5 X 10⁹ steps/sec² |
| Accel/Decel Resolution | 90.9 steps/sec² |
| Closed Loop (hMT/Encoder Functions On) | |
| Incremental Encoder Type | Internal, magnetic |
| Incremental Encoder Resolution | 1000 lines / 4000 edges |
| Multi-turn Absolute Encoder Type | Internal, magnetic |
| Multi-turn Absolute Encoder Data Retention (Internal Power) | 30 days |
| Multi-turn Absolute Encoder Data Retention (Battery Pack) | 5 years |
| Common Scaling (Encoder Counts : Full Step) | 20:1 |
| Common Counter Type | 32-bit Encoder |
| Common Encoder Functions (hMTechnology OFF) | Position maintenance, Find index, Stall detect |
| Common Encoder Functions (hMTechnology ON) | Anti-stall, Variable current control, Torque mode |
Software Specifications
| Specification | Value |
|---|---|
| Parameters | |
| Microstep resolution | 200 … 51200 steps/rev |
| Run current | 1 … 100 % |
| Holding current | 0 … 100 % |
| Hold current delay | 0 … 65535 ms |
| Clock modes | Step/dir, Quadrature, CW/CCW |
| Motion input filter | 38.8 kHz – 10 MHz |
| Enable input | Active state/filter |
| Advanced Operating Modes | Pulse/direction, Speed Control, Commanded Velocity, Torque Control1 |
| Advanced Parameters: Common | RS-422/485 |
| Advanced Parameters: Mode specific | I/O, Motion, Analog input, Velocity |
| hMTechnology | |
| hMT modes | hMT OFF, Fixed current, Variable current, Torque |
| Operation | Make-up position, Torque % |
Motor Performance
Screw G
Screw A
Screw B
Screw D
Screw Key
| Screw G | 0.3750 in (9.525 mm) per revolution |
| Screw A | 0.20 in (5.08 mm) per revolution |
| Screw B | 0.167 in (4.233 mm) per revolution |
| Screw D | 0.0833 in (2.116 mm) per revolution |
Do not exceed the nut’s rated thrust: 60 lbs (27 kg) for general‑purpose nuts and 25 lbs (11 kg) for anti‑backlash nuts.
Motor Specifications
| Attribute | Value |
|---|---|
| Maximum Screw Misalignment | ±1° |
| General Purpose Nut | |
| Maximum Thrust | 60 lbs (27 kg) |
| Maximum Repeatability | 0.005 in (0.127 mm) |
| Anti-Backlash Nut | |
| Maximum Thrust | 25 lbs (11 kg) |
| Maximum Repeatability | 0.0005 in (0.0127 mm) |
| Motor | |
| Rotor Inertia | 0.0025 oz-in-sec² (0.18 kg-cm²) |
| Weight (Motor+Driver) | 24.8 oz (703 g) |
Leadscrew Characteristics
Screw Travel Specifications
| Travel Per Revolution | |
| Screw G | 9.525 mm (0.375 in) |
| Screw A | 5.08 mm (0.2 in) |
| Screw B | 4.233 mm (0.167 in) |
| Screw D | 2.116 mm (0.0833 in) |
| Travel Per Full Step | |
| Screw G | 0.0476 mm (0.001875 in) |
| Screw A | 0.0254 mm (0.001 in) |
| Screw B | 0.0212 mm (0.000835 in) |
| Screw D | 0.0106 mm (0.0004165 in) |
Dimensional Information
| A | 3.0–24.0 in / 77.5–610.0 mm; 0.1 in / 0.25 mm increments |
| B | 0.5 in (12.7 mm) |
| C | 0.375 in (9.525 mm) |
Nut Specifications
General Purpose Nut
For applications not requiring backlash and wear compensation. Round flange shape.
Max Thrust: 25 lbs (11 kg)
For applications not requiring backlash and wear compensation. Round flange shape.
Max Thrust: 60 lbs (25 kg)
Anti-Backlash Nut
For applications requiring backlash-free operation for high accuracy and low drag torque. Triangle flange shape.
Factory-preloaded: The anti-backlash nut ships pre-loaded from the factory. Should you need to remove it please read the assembly instructions.
Max Thrust: 5 lbs (2 kg)
For applications requiring backlash-free operation for high accuracy and low drag torque. Triangle flange shape.
Factory-preloaded: The anti-backlash nut ships pre-loaded from the factory. Should you need to remove it please read the assembly instructions.
Max Thrust: 25 lbs (11 kg)
End Treatment Options
| None | — |
| Smooth | Ø 0.2362 in ± 0.001 (Ø 6 mm ± 0.003) |
| Threaded (Metric) | M6 x 1.0 thread to within 0.76 mm (0.03 in) of shoulder |
| Threaded (UNC) | 1/4‑20 UNC‑2A thread to within 0.05 in (1.3 mm) of shoulder |
Need a Custom Leadscrew Solution?
SEM offers numerous customization options for your lead screw. Contact us to learn more!
Leadscrew Maintenance Statement
While under optimal conditions lubrication interval is expected to occur approximately once every 1000 hours of service. Actual life will depend on application and environment. Based upon this, frequent inspections must be performed and a maintenance interval determined based on actual conditions.
Recommended lubricant: Dupont Krytox GPL 206
Mechanical Dimensions
- Filter by Part Number
- MD-CS630-000
- MD-CS620-000
- MD-CS600-000
- MD-CC405-000
| Part Number | Description | ||
|---|---|---|---|
 |
MD-CS630-000 |
The MD-CS630-000 is a 12-position, A-coded M12 male with flying leads cable used to interface I/O signals to the Liberty* MDrive product. Pre-wired shielded cables with straight M12 connector end for interfacing logic and I/O. 10′ (3 m) M12 to flying leads cable. |
|
 |
MD-CS620-000 |
The MD-CS620-000 is a 4-position, B-coded M12 female with flying leads cable used to interface DC power to Liberty* MDrive products. Pre-wired shielded cables with straight M12 connector end for interfacing DC power. 10′ (3 m) M12 to flying leads cable. |
|
 |
MD-CS600-000 |
The MD-CS600-000 is a 5-position, A-coded M12 male with flying leads cable used to interface RS-422/485 communications to Lexium MDrive products. It is not required if the MD-CC405-000 USB to M12 communications converter is being used. Pre-wired shielded cables with straight M12 connector end for serial communications. 10′ (3 m) cable. |
|
 |
MD-CC405-000 |
USB-pluggable converters set/program communication parameters in 32- or 64-bit. Kit includes pre-wired shielded cable with M12 connector. |
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