YASKAWA 023PLX0100-XX-3958X AC Servo Motor – Sigma SGM Series

YASKAWA 023PLX0100-XX-3958X: Integrated Servo Motor & Gearhead Assembly for Precision Motion Axes

The YASKAWA 023PLX0100-XX-3958X is a factory-integrated servo motor assembly pairing the SGM-02U3B4L AC servo motor with the 023 GEARHEAD (GRIT200MM). This assembly is engineered for motion control axes that demand simultaneous high torque multiplication and sub-arc-minute positional repeatability. The integrated build eliminates the mechanical backlash and alignment tolerances inherent in field-assembled motor-gearhead combinations, making it a preferred specification in semiconductor wafer transport, precision dispensing, and multi-axis robotic articulation.

The SGM-02U3B4L base motor belongs to YASKAWA’s Sigma series, a platform with a documented service history across high-cycle industrial environments. At 200 W rated output, the motor operates within the light-to-medium servo axis class, where thermal density and encoder fidelity are the primary design constraints. The GRIT200MM gearhead provides a fixed gear reduction ratio that converts the motor’s high-speed, low-torque output shaft into a low-speed, high-torque drive suitable for direct coupling to load mechanisms without intermediate transmission stages.

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Technical Parameters

Hardware Logical Analysis

The SGM-02U3B4L motor’s stator winding geometry is optimized for low cogging torque, a critical parameter in applications where the servo axis must hold position under variable side-load without continuous current injection. Cogging torque in the 200 W Sigma-series motors is controlled through skewed rotor lamination stacking, which distributes the reluctance variation across the electrical cycle and reduces torque ripple to levels below 1% of rated torque under typical operating conditions.

The encoder subsystem — whether incremental or absolute depending on the suffix — interfaces with the SGDH/SGDV drive via a dedicated serial encoder line. The absolute encoder variant retains position data through a supercapacitor-backed retention circuit, eliminating the need for homing routines after power interruption. This is architecturally significant in multi-axis systems where homing sequences consume machine cycle time and introduce synchronization complexity.

The GRIT200MM gearhead employs a planetary gear stage configuration. Planetary stages distribute load across multiple planet gears simultaneously, which reduces contact stress per gear tooth and extends fatigue life compared to single-mesh spur or helical gear arrangements. The output bearing arrangement is designed to accept combined radial and axial loads, allowing direct coupling to lead screws, rotary tables, or cam mechanisms without external thrust bearing provisions.

EMC performance of the assembly is governed by the motor’s shielded cable interface and the drive’s built-in EMI filter stage. The motor cable shield must be terminated at both the motor connector shell and the drive chassis ground to form a continuous Faraday enclosure around the high-frequency PWM current path. Failure to maintain this shield continuity is the primary source of conducted EMI in servo drive installations and can cause encoder signal corruption at frequencies above 1 MHz.

Thermal management relies on the motor’s aluminum housing acting as a passive heat spreader. The 200 W power class generates a worst-case continuous dissipation of approximately 20–30 W at rated load, which the housing conducts to the mounting flange. Installations that thermally isolate the motor from a metal machine frame must account for this heat path and may require forced-air cooling above 80% duty cycle operation.

System Integration Benefits

• Deterministic torque response: The factory-matched motor-gearhead assembly eliminates backlash variability introduced by field coupling, allowing the servo drive’s torque loop to operate against a mechanically consistent load model. This directly improves position loop bandwidth and reduces settling time on point-to-point moves.
• Reduced commissioning time: YASKAWA’s autotuning algorithms in the SGDV drive series are calibrated against known motor inertia values. Using the factory-specified assembly ensures the inertia ratio presented to the drive matches the tuning model, reducing the number of autotuning iterations required at startup.
• Diagnostic transparency via MECHATROLINK-II: When paired with an SGDV drive, the assembly supports real-time transmission of motor temperature, encoder error count, and overload accumulator value over the MECHATROLINK-II network. This data is available to the host controller without additional sensor wiring, enabling predictive maintenance scheduling based on actual thermal and mechanical load history.
• Encoder absolute position retention: The absolute encoder variant eliminates homing dependency, which is critical in systems where axis position must be known immediately after power restoration — such as in semiconductor cassette handlers where a homing move could cause a wafer collision.
• Gear stage load distribution: The planetary gearhead’s multi-mesh load sharing reduces peak tooth stress, extending the mechanical service interval and lowering the probability of sudden gear failure compared to single-mesh reduction stages.
• Flange-mount standardization: The IEC-standard flange interface allows the assembly to be mounted to machine frames designed for standard servo motor footprints, reducing custom mechanical adaptation work during system integration.
• Drive ecosystem compatibility: The SGM-02U3B4L motor is compatible across four YASKAWA drive series (SGDH, SGDV, SGDM, SGDZ), providing flexibility to integrate the motor into both legacy and current-generation control architectures without motor replacement.
• Traceability and OEM documentation: Factory-original assemblies carry YASKAWA’s OEM part number traceability, enabling direct cross-reference to the original equipment manufacturer’s BOM and simplifying spare parts management in regulated industries such as semiconductor fabrication and medical device manufacturing.

Quality Assurance & Global Logistics

Every unit of the YASKAWA 023PLX0100-XX-3958X supplied through siemensplc.com is sourced through verified industrial supply channels with full OEM part number traceability. Pre-shipment functional inspection is available upon request, covering encoder signal integrity, winding insulation resistance, and mechanical shaft runout. Original manufacturer packaging is preserved where available to maintain environmental protection during transit.

Shipments originate from our warehouse in Xiamen, China, a major logistics hub with direct access to international air freight and sea freight routes. Standard delivery to Southeast Asia, Europe, and North America is achieved within 3–7 business days via DHL Express, FedEx International Priority, or UPS Worldwide Expedited, depending on destination and urgency. Customs documentation including commercial invoice, packing list, and certificate of origin is prepared for each shipment to minimize clearance delays. For orders requiring expedited delivery, same-day dispatch is available for in-stock units confirmed before 14:00 CST.

A 12-month warranty is provided from the date of shipment, covering manufacturing defects and encoder system failures under normal operating conditions. Warranty claims are processed with a target response time of 1 business day. Replacement units are dispatched upon confirmation of the defect, and failed units are accepted for return freight-collect within the warranty period.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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