Description
MDS-EJ-SP-40 is a Mitsubishi Electric all-in-one spindle drive unit from the MDS-EJ/EJH series, designed for CNC machine tools and industrial automation systems.
Description
- Manufacturer: Mitsubishi Electric
- Series: MDS-EJ / EJH Series
- Model: MDS-EJ-SP-40
- Type: 1-axis spindle drive unit (with built-in converter)
- Application: CNC lathes, machining centers, milling machines, turning centers
Main Function
This unit is a spindle amplifier that:
- Receives spindle speed commands from the CNC controller
- Controls spindle motor speed and torque
- Provides smooth acceleration/deceleration
- Supports regenerative braking
- Uses integrated compact drive architecture
Key Specifications
- Drive category: 1-axis spindle drive (with converter)
- Nominal maximum current (peak): 40 A
- Power input: 3-phase 200–240 VAC
- Input current: 9.0 A
- Control power: Single-phase 200–240 VAC
- Frequency: 50/60 Hz
- Control method: Sine-wave PWM control
- Regeneration method: Power regeneration
- Cooling: Forced air cooling
- Protection class: IP20
- Weight: Approx. 2.1 kg
Main Connections / Terminals
Typical terminals and connectors include:
- L1, L2, L3 → 3-phase AC input
- U, V, W → spindle motor output
- L11, L21 → control power input
- P+, C, D → regenerative resistor connection
- CN1A / CN1B → optical communication
- CN2 / CN3 → encoder connections
- E → grounding terminal
CNC System Role
CNC controller → MDS-EJ-SP-40 → Spindle motor → Machine spindle rotation
Important Clarification
- SP models = spindle motor drives
- V1 models = servo axis drives
- CV models = power supply / converter units
- DH-AL models = AC input reactors
Features
- Compact all-in-one architecture
- Built-in converter section
- High-precision spindle speed control
- Regenerative braking support
- Reduced CNC cabinet size