{"product_id":"used-tested-harmonic-drive-fha-8c-50-e200-c-ac-servo-actuator","title":"HARMONIC DRIVE FHA-8C-50-E200-C AC Servo Actuator","description":"\u003cdiv class=\"koeed-container\" style=\"width:100%;color:#333;line-height:1.7;\"\u003e\n\n  \u003cstyle\u003e\n    .koeed-container h2,\n    .koeed-container h3{\n      color:#16c8c8;\n      margin-top:38px;\n      margin-bottom:18px;\n    }\n\n    .koeed-container table{\n      width:100%;\n      border-collapse:collapse;\n      margin:18px 0;\n    }\n\n    .koeed-container th,\n    .koeed-container td{\n      border:1px solid #eeeeee;\n      padding:10px;\n      text-align:left;\n      vertical-align:top;\n    }\n\n    .koeed-container th{\n      background:#16c8c8;\n      color:#fff;\n    }\n\n    .koeed-container tr:nth-child(odd){\n      background:#fafafa;\n    }\n\n    .koeed-container tr:nth-child(even){\n      background:#f4fcfc;\n    }\n\n    .koeed-highlight{\n      color:#16c8c8;\n      font-weight:bold;\n    }\n\n    .koeed-note{\n      background:#f4fcfc;\n      border-left:4px solid #16c8c8;\n      padding:14px;\n      margin:18px 0;\n    }\n  \u003c\/style\u003e\n\n  \u003ch2\u003eEngineer's Quick Brief\u003c\/h2\u003e\n\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHARMONIC DRIVE FHA-8C-50-E200-C\u003c\/strong\u003e is a compact hollow-shaft AC servo actuator designed for ultra-precise rotary motion control in robotics, semiconductor handling, optical positioning, and compact automation systems.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003e50:1 Harmonic Drive reduction\u003c\/strong\u003e enables zero-backlash positioning with exceptionally high repeatability and smooth low-speed motion characteristics.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eIntegrated hollow shaft architecture\u003c\/strong\u003e simplifies cable routing, air tubing pass-through, and compact robotic joint design while reducing external mechanical complexity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eE200 incremental encoder configuration\u003c\/strong\u003e supports high-resolution motion feedback for precision servo control applications requiring stable micro-positioning performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eSEO Introduction\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The \u003cstrong\u003eHARMONIC DRIVE FHA-8C-50-E200-C AC Servo Actuator\u003c\/strong\u003e is a miniature high-precision servo actuator integrating a brushless AC servo motor, Harmonic Drive® reduction gear, integrated output bearing, and incremental encoder into a compact hollow-shaft structure. \n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    This actuator is widely deployed in \u003cstrong\u003erobotics\u003c\/strong\u003e, \u003cstrong\u003esemiconductor manufacturing equipment\u003c\/strong\u003e, \u003cstrong\u003eoptical positioning systems\u003c\/strong\u003e, \u003cstrong\u003emedical automation\u003c\/strong\u003e, and \u003cstrong\u003eprecision indexing mechanisms\u003c\/strong\u003e where zero backlash, compact form factor, and stable positioning accuracy are critical.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    The FHA-C Mini platform is optimized for applications requiring \u003cstrong\u003ehigh torque density\u003c\/strong\u003e, \u003cstrong\u003elightweight integration\u003c\/strong\u003e, and \u003cstrong\u003ehigh-resolution servo motion control\u003c\/strong\u003e within extremely limited installation spaces.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n  \u003cdiv style=\"overflow-x:auto;\"\u003e\n\n    \u003ctable\u003e\n      \u003ctr\u003e\n        \u003cth\u003eParameter\u003c\/th\u003e\n        \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eManufacturer\u003c\/td\u003e\n        \u003ctd\u003eHarmonic Drive Systems\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eSeries\u003c\/td\u003e\n        \u003ctd\u003eFHA-C Mini Series\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eModel\u003c\/td\u003e\n        \u003ctd\u003eFHA-8C-50-E200-C\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eActuator Type\u003c\/td\u003e\n        \u003ctd\u003eAC Servo Actuator with Hollow Shaft\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eReduction Ratio\u003c\/td\u003e\n        \u003ctd\u003e50:1\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eEncoder Type\u003c\/td\u003e\n        \u003ctd\u003eIncremental Encoder (E200)\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eEncoder Resolution\u003c\/td\u003e\n        \u003ctd\u003e2000 pulse\/revolution encoder class\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eMaximum Torque\u003c\/td\u003e\n        \u003ctd\u003e3.3 Nm\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eMaximum Speed\u003c\/td\u003e\n        \u003ctd\u003e120 rpm\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eTorque Constant\u003c\/td\u003e\n        \u003ctd\u003e1.3 Nm\/A(rms)\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eMaximum Current\u003c\/td\u003e\n        \u003ctd\u003e3.3 A(rms)\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eAllowable Continuous Current\u003c\/td\u003e\n        \u003ctd\u003e1.7 A(rms)\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eOne-Way Positioning Accuracy\u003c\/td\u003e\n        \u003ctd\u003e120 arc-sec\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eAllowable Moment Load\u003c\/td\u003e\n        \u003ctd\u003e40 Nm\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eMoment Stiffness\u003c\/td\u003e\n        \u003ctd\u003e4 × 10\u003csup\u003e4\u003c\/sup\u003e Nm\/rad\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eMoment of Inertia (GD²\/4)\u003c\/td\u003e\n        \u003ctd\u003e0.0100 kg·m²\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eOutput Resolution\u003c\/td\u003e\n        \u003ctd\u003e400,000 p\/rev\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eHollow Shaft Diameter\u003c\/td\u003e\n        \u003ctd\u003e8 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eOuter Diameter\u003c\/td\u003e\n        \u003ctd\u003e80 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eMass\u003c\/td\u003e\n        \u003ctd\u003e0.62 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eStructure\u003c\/td\u003e\n        \u003ctd\u003eCompact Flat Hollow-Shaft Design\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eFeedback Interface\u003c\/td\u003e\n        \u003ctd\u003eIncremental RS-422 Encoder Architecture\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eCompatible Servo Drives\u003c\/td\u003e\n        \u003ctd\u003eRTL-230-18, REL-230-18, HA-800 Series, DDP\/DEP Series\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eTypical Supply Voltage\u003c\/td\u003e\n        \u003ctd\u003e24VDC \/ 100VAC \/ 200VAC platform variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eBacklash\u003c\/td\u003e\n        \u003ctd\u003ePractically Zero Backlash Harmonic Drive Mechanism\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eMounting Style\u003c\/td\u003e\n        \u003ctd\u003eFlange Mount\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eTypical Industrial Use\u003c\/td\u003e\n        \u003ctd\u003eRobotics, Optical Alignment, Precision Rotary Axes\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n    \u003c\/table\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"koeed-note\"\u003e\n    \u003cstrong\u003eEngineering Note:\u003c\/strong\u003e The FHA-8C-50-E200-C combines the servo motor, reduction gear, encoder, and output support bearing into a single compact module, reducing assembly complexity and improving axis rigidity compared with separate motor + gearbox architectures.\n  \u003c\/div\u003e\n\n  \u003ch2\u003eApplication Matrix\u003c\/h2\u003e\n\n  \u003cdiv style=\"overflow-x:auto;\"\u003e\n\n    \u003ctable\u003e\n\n      \u003ctr\u003e\n        \u003cth\u003eIndustry\u003c\/th\u003e\n        \u003cth\u003eApplication\u003c\/th\u003e\n        \u003cth\u003eEngineering Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eIndustrial Robotics\u003c\/td\u003e\n        \u003ctd\u003eSmall robotic joints and rotary axes\u003c\/td\u003e\n        \u003ctd\u003eCompact high-torque positioning with zero backlash\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eSemiconductor Equipment\u003c\/td\u003e\n        \u003ctd\u003eWafer handling and precision indexing\u003c\/td\u003e\n        \u003ctd\u003eStable repeatability and vibration reduction\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eOptical Systems\u003c\/td\u003e\n        \u003ctd\u003eLaser scanning and optical alignment\u003c\/td\u003e\n        \u003ctd\u003eHigh-resolution angular positioning\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eMedical Automation\u003c\/td\u003e\n        \u003ctd\u003eSurgical positioning and compact actuators\u003c\/td\u003e\n        \u003ctd\u003eSmooth low-speed motion with minimal backlash\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003ePrecision Inspection Equipment\u003c\/td\u003e\n        \u003ctd\u003eRotary positioning tables\u003c\/td\u003e\n        \u003ctd\u003eImproved motion accuracy and compact integration\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eLaboratory Automation\u003c\/td\u003e\n        \u003ctd\u003eMicro-positioning systems\u003c\/td\u003e\n        \u003ctd\u003eHigh repeatability in confined mechanical layouts\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n    \u003c\/table\u003e\n\n  \u003c\/div\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n  \u003ch3\u003eWhy is the actuator heating during low-speed holding operation?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    Continuous holding torque at low speed can increase motor current and thermal load. Verify servo tuning parameters, allowable continuous current limits, and duty cycle configuration.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eCan the hollow shaft be used for cable routing?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    Yes. The FHA-C Mini architecture is specifically designed for cable, air tube, or optical path pass-through applications inside robotic or compact rotary mechanisms.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhat causes positioning instability in precision indexing systems?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    Common causes include improper servo gain settings, excessive external inertia, insufficient mechanical rigidity, or encoder signal noise.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eIs external support bearing required?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    In many compact applications, the integrated output bearing can directly support the payload without additional bearing structures. Final validation depends on radial, axial, and moment load conditions.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhich servo drives are commonly used with FHA-8C actuators?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    Typical compatible platforms include Harmonic Drive DDP, DEP, REL, RTL, and HA-series servo controllers depending on voltage and encoder configuration.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eHow should the actuator be mounted?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    Use precision flange mounting surfaces with controlled alignment tolerances to prevent bearing preload distortion and output shaft eccentricity.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eCross-Reference Guide\u003c\/h2\u003e\n\n  \u003cdiv style=\"overflow-x:auto;\"\u003e\n\n    \u003ctable\u003e\n\n      \u003ctr\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRelationship\u003c\/th\u003e\n        \u003cth\u003eDifference\u003c\/th\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eFHA-8C-30-E200\u003c\/td\u003e\n        \u003ctd\u003eLower reduction ratio variant\u003c\/td\u003e\n        \u003ctd\u003eHigher output speed, lower torque multiplication\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eFHA-8C-100-E200\u003c\/td\u003e\n        \u003ctd\u003eHigher reduction ratio variant\u003c\/td\u003e\n        \u003ctd\u003eHigher positioning resolution and torque\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eFHA-11C-50-E200\u003c\/td\u003e\n        \u003ctd\u003eLarger frame size alternative\u003c\/td\u003e\n        \u003ctd\u003eHigher torque and moment load capacity\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eFHA-14C-50-E200\u003c\/td\u003e\n        \u003ctd\u003eHigher-capacity actuator\u003c\/td\u003e\n        \u003ctd\u003eIncreased payload and rigidity\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eRSF-8A Series\u003c\/td\u003e\n        \u003ctd\u003eRelated Harmonic Drive compact actuator platform\u003c\/td\u003e\n        \u003ctd\u003eDifferent mechanical architecture and integration approach\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n    \u003c\/table\u003e\n\n  \u003c\/div\u003e\n\n  \u003cscript type=\"application\/ld+json\"\u003e\n  {\n    \"@context\":\"https:\/\/schema.org\",\n    \"@type\":\"FAQPage\",\n    \"mainEntity\":[\n      {\n        \"@type\":\"Question\",\n        \"name\":\"Why is the actuator heating during low-speed holding operation?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"Continuous holding torque at low speed can increase motor current and thermal load. Verify servo tuning parameters, allowable continuous current limits, and duty cycle configuration.\"\n        }\n      },\n      {\n        \"@type\":\"Question\",\n        \"name\":\"Can the hollow shaft be used for cable routing?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"Yes. The FHA-C Mini architecture is specifically designed for cable, air tube, or optical path pass-through applications inside robotic or compact rotary mechanisms.\"\n        }\n      },\n      {\n        \"@type\":\"Question\",\n        \"name\":\"What causes positioning instability in precision indexing systems?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"Common causes include improper servo gain settings, excessive external inertia, insufficient mechanical rigidity, or encoder signal noise.\"\n        }\n      },\n      {\n        \"@type\":\"Question\",\n        \"name\":\"Is external support bearing required?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"In many compact applications, the integrated output bearing can directly support the payload without additional bearing structures.\"\n        }\n      },\n      {\n        \"@type\":\"Question\",\n        \"name\":\"Which servo drives are commonly used with FHA-8C actuators?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"Typical compatible platforms include Harmonic Drive DDP, DEP, REL, RTL, and HA-series servo controllers depending on voltage and encoder configuration.\"\n        }\n      }\n    ]\n  }\n  \u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"HARMONIC","offers":[{"title":"Default Title","offer_id":44570698318009,"sku":"335336175785","price":500.04,"currency_code":"USD","in_stock":true}],"url":"https:\/\/koeed.com\/products\/used-tested-harmonic-drive-fha-8c-50-e200-c-ac-servo-actuator","provider":"KOEED","version":"1.0","type":"link"}