{"product_id":"feetech-hl-3935-servo-motor","title":"FEETECH HL-3935 Servo Motor","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eThe \u003cb data-path-to-node=\"2\" data-index-in-node=\"4\"\u003eHL-3935-C001\u003c\/b\u003e is an advanced 12V 35kg-class double shaft constant force serial BUS servo powered by a high-efficiency coreless motor and enclosed in a rugged full-aluminum case for exceptional heat dissipation and durability. Engineered for high-end multi-joint robotics, smart industrial linkages, and precise automation, it features ultra-reliable steel gears with a 1\/378 reduction ratio, dual ball bearings, a standard 25T\/OD5.9mm horn gear spline, and no mechanical limit angles. Operating over a 9V-12.6V range, it delivers a massive peak stall torque of 35kg.cm and a rated load of 8.5kg.cm at 12V, achieving an impressive no-load speed of 0.117sec\/60° (85RPM) and a KT constant of 11.5kg.cm\/A. Utilizing a customizable PID control algorithm via digital packets, it communicates seamlessly through half-duplex asynchronous serial protocol with an ID range of 0-253 and adjustable speeds up to 1 Mbps. The servo supports versatile operating modes including angle servo (0-360° position control), motor constant speed, and motor constant current modes alongside a unique constant force output configuration and multi-loop mode supporting positive\/negative 7 turns. Delivering an ultra-fine electronic resolution of 0.088° (360°\/4096 steps) with a neutral position at 180° (2048) and clockwise rotation, this 85±1g smart servo outputs comprehensive real-time telemetry feedback—including load, position, speed, input voltage, current, and temperature—via its 15CM connector wire for sophisticated closed-loop robotic control systems.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e \u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n        :root {\n            --tech-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);\n            --border-color: #d1d9e6;\n            --row-alt: #f8faff;\n        }\n\n        body {\n            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;\n            background-color: #f0f4f8;\n            padding: 20px;\n            margin: 0;\n            color: #333;\n        }\n\n        .table-container {\n            max-width: 900px;\n            margin: 0 auto;\n            background: #fff;\n            border-radius: 8px;\n            box-shadow: 0 4px 15px rgba(0,0,0,0.1);\n            overflow: hidden;\n        }\n\n        .main-header {\n            background: var(--tech-gradient);\n            color: white;\n            padding: 15px;\n            text-align: center;\n            font-size: 1.25rem;\n            font-weight: bold;\n            text-transform: uppercase;\n            letter-spacing: 1px;\n            border-bottom: 2px solid #fff;\n        }\n\n        table {\n            width: 100%;\n            border-collapse: collapse;\n            background: white;\n            table-layout: fixed;\n        }\n\n        th, td {\n            padding: 12px 15px;\n            border: 1px solid var(--border-color);\n            text-align: center;\n            word-wrap: break-word;\n            font-size: 0.9rem;\n        }\n\n        .params-header {\n            background-color: #004085 !important;\n            color: white !important;\n            text-align: center;\n            font-weight: bold !important;\n            text-transform: uppercase;\n        }\n\n        tr:nth-child(even) {\n            background-color: var(--row-alt);\n        }\n\n        .param-col { width: 45%; font-weight: bold; text-align: left; padding-left: 25px; }\n        .value-col { font-weight: 500; width: 55%; text-align: left; padding-left: 25px; }\n\n        .content-footer {\n            max-width: 900px;\n            margin: 0 auto;\n            padding: 20px 5px;\n        }\n\n        @media screen and (max-width: 600px) {\n            body { padding: 10px; }\n            th, td { padding: 8px 10px; font-size: 0.8rem; }\n            .main-header { font-size: 1rem; }\n        }\n    \u003c\/style\u003e\n\u003cdiv class=\"table-container\"\u003e\n\u003cdiv class=\"main-header\"\u003eFEETECH HL-3935-C001 Specifications\u003c\/div\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" class=\"params-header\"\u003ePRODUCT PARAMETERS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003eHL-3935-C001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eProduct Name\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e12V 35kg Double Shaft Constant Force Serial Bus Servo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eStorage Temperature Range\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e-30℃~80℃\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eOperating Temperature Range\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e-20℃~60℃\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eTemperature Range\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e25℃ ±5℃\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eHumidity Range\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e65%±10%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eSize\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003eA：40mm B：20mm C：40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eWeight\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e85± 1g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eGear type\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003esteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eLimit angle\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003eNo limit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eBearing\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003eBall bearings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eHorn gear spline\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e25T\/OD5.9mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eGear Ratio\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e1\/378\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eCase\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eConnector wire\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e15CM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eMotor\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003eCoreless Motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eRated Input Voltage\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e9V-12.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eNo load speed\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e0.117sec\/60°(85RPM)@12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eRunnig current(at no load) :\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e200mA@12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003ePeak stall torque\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e35kg.cm@12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eStall current\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e3.1A@12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eRated Load\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e8.5kg. cm@12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eRated current\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e800mA@12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eKT constant\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e11.5kg. cm\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eTerminal resistance\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e1.75 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eOperating Modes\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003eMode 0: Angle servo mode (default mode, absolute position controllable from 0-360 degrees)\u003cbr\u003e\u003cbr\u003eMode 1: Motor constant speed mode (motor constant speed mode, maintains speed without deceleration as the load increases)\u003cbr\u003e\u003cbr\u003eMode 2: Motor constant current mode (motor constant current mode,maintains current without decreasing with increasing load) can achieve absolute position\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eConstant force output\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003eSet the output torque value, the servo can maintain this torque (input the target torque value corresponding to address 44, the servo can maintain this torque)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eMulti-Loop Mode\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003econtrol of positive and negative 7 turns at the highest accuracy, but the umber of power failure turns is not saved (the resolution can be expanded, and the number of turns can be doubled)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eCommand signal\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003eDigital Packet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eProtocol Type\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003eHalf Duplex Asynchronous Serial Communication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eID range\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e0-253\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eCommunication Speed\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e38400bps ~ 1 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eControl Algorithm\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003ePID\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eNeutral Position\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e180° (2048)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eRunning degree\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e360° (when 0~4096)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eResolution [deg\/pulse]\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003e0.088°(360°\/4096)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eRotating Direction\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003eClockwise(0→4096)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"param-col\"\u003eFeedback\u003c\/td\u003e\n\u003ctd class=\"value-col\"\u003eLoad , Position ,Speed , Input Voltage , Current ,Temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"content-footer\"\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0696\/3832\/4277\/files\/FEETECH-HL3935-PRODUCT-SPECIFICATION.pdf?v=1783313925\" title=\"FEETECH-HL3935-PRODUCT-SPECIFICATION.PDF\"\u003eFEETECH-HL3935-PRODUCT-SPECIFICATION.PDF\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0696\/3832\/4277\/files\/FEETECH-HL-3935-Servo-Motor.stp?v=1783313927\" title=\"FEETECH-HL-3935-Servo-Motor.STEP\"\u003eFEETECH-HL-3935-Servo-Motor.STEP\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"FEETECH","offers":[{"title":"HL-3935-C001 (12V35KG)","offer_id":45704686927925,"sku":null,"price":89.0,"currency_code":"USD","in_stock":true},{"title":"HL-3935-C001 + URT-1 Debug board","offer_id":45704686960693,"sku":null,"price":103.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3832\/4277\/files\/FEETECHHL-3935ServoMotor-main-001.jpg?v=1783341689","url":"https:\/\/www.zennixtek.com\/products\/feetech-hl-3935-servo-motor","provider":"ZennixTek","version":"1.0","type":"link"}