Yaskawa SGMSV-30ADA21 3kW Sigma-V AC Servo Motor

Description

Product Introduction

The Yaskawa SGMSV-30ADA21 is a 3.0 kW medium-inertia AC servo motor designed for high-dynamic positioning applications within the Yaskawa Sigma-V (Sigma-5) motor ecosystem. Paired with SGDV or SGD7S SERVOPACK amplifiers, the SGMSV line balances high power output with medium rotor inertia, preventing load-mismatch oscillations on demanding automated machinery.

Equipped with a 20-bit high-resolution feedback encoder (1,048,576 pulses per revolution), the SGMSV-30ADA21 provides ultra-precise position tracking, smooth low-speed rotation, and rapid settling times. Its compact physical footprint and IP65-rated body make it ideal for high-duty applications including CNC milling centers, automated cutting machinery, and high-speed robotic transfer systems.

Key Technical Specifications

SGMSV-30ADA21

SGMSV-30ADA21

Application Scenarios & The “Trench” Experience

It’s 2:15 AM on a high-throughput wood routing and CNC machining cell. The Z-axis/main tool positioning servo trips with an A.810 (encoder communication fault) or A.710 (overload) alarm, locking up the machine mid-job. Replacing the entire drive train to a newer model generation means upgrading the drive, replacing signal cables, and performing costly software re-validation. You need a direct drop-in SGMSV-30ADA21 motor to mount to the original flange, connect to existing power and encoder harnesses, and resume production.

• CNC Metalworking & Routing – Axis Feed Drives – Delivers high positioning resolution (20-bit) and 3.0 kW power to sustain smooth cuts under heavy feed forces.
• Automated Packaging & Indexing – Rotary Tables & Transfer Gantries – Medium-inertia rotor design handles load inertia variations without resonance or overshoot.
• Material Handling & Robotics – Pick-and-Place Actuators – Rapid acceleration capability up to 5000 RPM max speed minimizes cycle times.

Field Case Study:

An automotive parts fabricator in Ohio experienced a winding insulation breakdown on a 3kW servo motor driving a high-speed metal shearing line. The line stopped completely, creating a massive bottleneck. We dispatched a verified surplus SGMSV-30ADA21 unit via overnight priority freight. The facility technician unbolted the failed motor, transferred the coupling onto the keyed shaft, reconnected the military-style IP65 connectors, reset the absolute encoder multi-turn data via SigmaWin+, and restored full operation within 35 minutes of arrival.

Transparency SOP: Quality Assurance & Testing

We test all Yaskawa servo motors on physical Yaskawa SGDV SERVOPACK test benches.

1. Inbound Physical Inspection: Check shaft concentricity, keyway integrity, connector pins, rear encoder housing, and overall mounting flange condition.
2. Winding Resistance & Megohmmeter Audit: Phase-to-phase resistance tests (U-V, V-W, W-U) to confirm balanced stator windings, followed by a 500V DC megger test to verify insulation integrity to chassis ground.
3. Closed-Loop Drive Bench Run: Connection to a matching Yaskawa SGDV 200V SERVOPACK to execute full speed sweeps up to 5000 RPM in both CW and CCW directions.
4. 20-Bit Encoder Data Verification: Verification of high-resolution serial encoder data stream, checking absolute position memory retention and multi-turn counting.
5. Anti-Static & Protective Packaging: Cleaned, sealed in heavy moisture-barrier material, and packed in reinforced shock-absorbing foam.

The Veteran’s Tech Trap Guide

⚠️ Decode Your Full Model Code (SGMSV-30ADA21):

Break down the model configuration to ensure exact physical match:

• SGMSV: Medium Inertia Series
• 30: 3.0 kW Power Rating
• A: 200 VAC Input
• D: 20-bit Absolute/Incremental Serial Encoder
• A: Standard Design Sequence
• 21: Straight shaft with keyway and tapped hole (No holding brake).

  Installing a non-brake motor (21) on a vertical axis requiring an internal brake (2C) will cause gravity load drops when power turns off.

❗ Never Strike the Shaft or Keyway with a Hammer:

When installing couplings or pulleys onto the keyed shaft (21), use a proper puller/press tool or the shaft’s tapped hole to draw components on. Tapping directly on the shaft shatters the glass disc inside the rear 20-bit optical encoder.

⚠️ Maintain Proper Drip Loops on Connectors:

Although the body carries an IP65 rating, liquid pooling inside unsealed connector boots will short out the sensitive 20-bit serial encoder lines over time. Always loop cables below connector height so condensation drains away from the motor body.

Frequently Asked Questions

Q: Does the SGMSV-30ADA21 come with an integrated holding brake?

A: No. The 21 suffix indicates a straight shaft with key/tap and no brake. Models equipped with a 24V DC holding brake end in suffixes like 2C or E.

Q: Can I run this motor with a Sigma-7 (SGD7S) SERVOPACK amplifier?

A: Yes. Yaskawa Sigma-7 amplifiers are backward-compatible with Sigma-V series motors like the SGMSV, provided the amplifier parameter settings are configured for the motor model.

Q: Do I need to perform an encoder reset after installing a replacement motor?

A: If operating your SERVOPACK system in Absolute Encoder Mode, you must execute an absolute encoder multi-turn clear/reset via the SERVOPACK digital operator panel or SigmaWin+ software after installation.

Q: What is the benefit of the medium-inertia rotor design?

A: Medium-inertia rotors provide high stability when driving loads with variable or large mechanical inertias (such as ball screws and gearboxes), preventing vibration and parameter tuning issues common with low-inertia motors.

Q: What warranty is provided with this surplus motor?

A: Every Yaskawa SGMSV-30ADA21 motor supplied is backed by a full 12-month replacement warranty. If the unit experiences mechanical or electrical failure under normal operating conditions during the warranty period, we replace it directly from stock.