Mitsubishi M80 Spindle Drive MDS-EH-SP-320

The Mitsubishi MDS-EH-SP-320 is an ultra high-power CNC spindle drive unit (AC spindle amplifier) from the MDS-EH series, designed for very large spindle motors and heavy industrial machining systems.

🔧 Description

• Product type: CNC spindle drive / spindle amplifier
• Series: MDS-EH
• Model: MDS-EH-SP-320
• Manufacturer: Mitsubishi Electric
• Function: Controls spindle motor speed, torque, orientation, rigid tapping, and high-power machining operations
• Application: Large CNC machining centers, gantry machines, heavy lathes, and high-production industrial machining systems
• Control method: Sine-wave PWM vector spindle control
• Cooling: Forced-air cooling
• Protection class: IP20 (cabinet-mounted industrial use)

⚙️ Main Specifications

• Drive type: 1-axis spindle amplifier
• Nominal maximum current: 320A
• Rated output current: 125A
• Rated output voltage: 323–340VAC class
• DC bus input voltage: 513–648V DC
• Control power supply: 380–480V AC, 50/60Hz
• Input current rating: 119A
• Control method: Sine-wave PWM control with regenerative braking
• Cooling method: Forced-air cooling
• Weight: Approx. 16.5kg class
• Heat radiation at rated output: 1202W

🏭 Typical Applications

• Large CNC machining centers
• Gantry machining systems
• Heavy-duty milling machines
• Large turning centers
• Continuous industrial production machines
• High-inertia spindle systems

📌 Main Features

• High-speed vector spindle control
• Rigid tapping / synchronized tapping
• Spindle orientation control
• Constant surface speed control
• High torque at low RPM
• Regenerative braking support
• Optical high-speed CNC communication
• Integrated diagnostics and protection functions

📊 Position in the SP Series

• SP-20 → light spindle systems
• SP-40 → medium spindle systems
• SP-80 / SP-100 → high-power spindle systems
• SP-160 / SP-200 → very high-power spindle systems
• SP-320 → ultra heavy-duty industrial spindle systems
• SP-480 / SP-600 → maximum-capacity spindle applications

⚠️ Important Notes

• • SP models are spindle amplifiers, not feed-axis servo amplifiers
  • Requires Mitsubishi CNC controllers (M70 / M700 / M800 series)
  • Must be matched with compatible Mitsubishi spindle motors and encoder systems
  • Designed only for industrial electrical cabinet installation
  • In later Mitsubishi generations, some installations replaced SP-320 with MDS-DH2-SP-320 models