Yaskawa SGMAS-01ACA21 Servo Motor

Yaskawa SGMAS-01ACA21 Servo Motor (Sigma-5 / Compact Low-Power Servo Motor)

 

 

The Yaskawa SGMAS-01ACA21 is a Sigma-5 series AC servo motor, typically used for small precision motion control applications in CNC machines, robotics, and automated equipment.

It is a low-power high-speed brushless servo motor that must be paired with a compatible Yaskawa servo drive (Servopack) for operation.

Product Information (typical confirmed specs)

• Brand: Yaskawa (Japan)
• Series: Sigma-5 (SGMAS)
• Model: SGMAS-01ACA21
• Type: AC servo motor (brushless PMSM)
• Rated power: ~100 W (0.1 kW)
• Rated voltage: 200 VAC class
• Rated speed: ~3000 rpm
• Rated current: ~0.9 A (varies by configuration)
• Torque: ~0.32 N·m class
• Encoder: High-resolution incremental encoder (Sigma series)
• Cooling: Natural air cooling
• Mounting: Flange mount industrial servo motor

What it actually is

This is a precision motion actuator, meaning:

• Converts electrical energy → controlled rotation
• Uses encoder feedback for accurate positioning
• Works only with a dedicated servo drive system

It does NOT operate by itself.

System Role (Simple)

Motion controller / PLC
→ Yaskawa servo drive (SGDV or similar)
→ SGMAS-01ACA21 servo motor (this unit)
→ machine axis movement (positioning / feed / robot joint)

Key Features

• High precision positioning (closed-loop control)
• Compact small-frame servo motor
• Smooth low-speed performance
• Fast response acceleration/deceleration
• High-resolution encoder feedback
• Designed for continuous industrial duty

Typical Applications

• Small CNC axes
• Pick-and-place machines
• Packaging equipment
• Semiconductor/light automation
• Small robotics systems
• Precision feed mechanisms

Advantages

• Very high positioning accuracy
• Stable torque at low speed
• Compact size for tight machine layouts
• Reliable Yaskawa industrial design
• Excellent servo responsiveness

Important Notes

• Not a VFD motor ❌
• Not a stepper motor ❌
• Not a standalone motor ❌
• Not a PLC or controller ❌
• It is a servo motor that requires a matching Yaskawa servo drive system ✔

Precautions

• Must match correct Yaskawa servo amplifier (drive)
• Encoder is sensitive—handle connector carefully
• Incorrect wiring may cause drive alarms or damage
• Requires tuning in servo drive parameters
• Proper grounding/shielding required for encoder signal stability