{"product_id":"fanuc-a20b-8200-0143-servo-motor-encoder","title":"FANUC A20B-8200-0143 Servo Motor Feedback Encoder","description":"\u003cp style=\"margin: 0 0 14px;\"\u003e\u003cstrong\u003eFANUC A20B-8200-0143\u003c\/strong\u003e is a \u003cstrong\u003eservo motor feedback encoder\u003c\/strong\u003e that reports rotor position and speed to a compatible FANUC servo system. It is a motor-mounted encoder assembly, not a CNC main board, robot controller PCB or servo amplifier.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 14px;\"\u003eA confirmed application is the \u003cstrong\u003eFANUC A06B-0115-B275#0021\u003c\/strong\u003e βiS 0.5\/4000 AC servo motor. Available documentation identifies this motor with a brake, keyed straight shaft and incremental feedback. Compatibility must be checked from the complete motor and encoder nameplates.\u003c\/p\u003e\n\u003ch4 style=\"margin: 32px 0 14px;\"\u003eA20B-8200-0143 Product Information\u003c\/h4\u003e\n\u003ctable cellpadding=\"10\" style=\"width: 100%; border-collapse: collapse; margin: 0 0 18px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f7f8fa;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFANUC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel \/ MPN\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA20B-8200-0143\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f7f8fa;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eServo motor feedback encoder \/ pulse coder assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeedback Function\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMotor position and rotational-speed feedback\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f7f8fa;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeedback Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIncremental feedback configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfirmed Motor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA06B-0115-B275#0021\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f7f8fa;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eMotor Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFANUC βiS 0.5\/4000 AC servo motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupply Scope\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEncoder only; motor and feedback cable not included unless quoted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f7f8fa;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew, refurbished, or used 90% new; subject to stock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHandling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNormally 1–3 business days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f7f8fa;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eShipping \/ ETA\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDHL, UPS, or FedEx worldwide; typically 2–6 business days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 year for new\/refurbished; 3 months for used 90% new\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f7f8fa;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eService \/ Packing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100% tested, test video and technical support; anti-static reinforced packing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4 style=\"margin: 32px 0 14px;\"\u003eServo Position and Speed Feedback\u003c\/h4\u003e\n\u003cp style=\"margin: 0 0 14px;\"\u003eThe A20B-8200-0143 converts motor rotation into feedback signals used by the servo amplifier for closed-loop control. Stable feedback helps regulate speed, position and torque response. Encoder faults may cause feedback alarms, unstable motion, vibration, positioning errors or failure to enable the servo axis.\u003c\/p\u003e\n\u003ch4 style=\"margin: 32px 0 14px;\"\u003eExact Motor and Encoder Matching\u003c\/h4\u003e\n\u003cp style=\"margin: 0 0 14px;\"\u003eDo not select this encoder from the A06B-0115 family prefix alone. Confirm \u003cstrong\u003eA20B-8200-0143\u003c\/strong\u003e, the full motor number including \u003cstrong\u003e#0021\u003c\/strong\u003e, connector, mounting, feedback specification and amplifier compatibility. Other A06B-0115-B275 suffixes can use different detectors and are not automatically interchangeable.\u003c\/p\u003e\n\u003ch4 style=\"margin: 32px 0 14px;\"\u003eTesting and Installation Notes\u003c\/h4\u003e\n\u003cp style=\"margin: 0 0 14px;\"\u003eREACO CNC checks the marking, housing, connector, electronics, feedback signals and pulse consistency with a compatible motor or test setup. Replacement requires correct mechanical alignment and feedback phasing. Qualified personnel should verify parameters and complete the required machine reference procedure after installation.\u003c\/p\u003e\n\u003cp style=\"margin: 0;\"\u003eRelated resources: \u003ca href=\"\/collections\/fanuc-cnc-robot-parts\"\u003eFANUC CNC and servo parts\u003c\/a\u003e and \u003ca href=\"\/products\/fanuc-mitsubishi-cnc-robot-parts-repair\"\u003eFANUC servo motor and encoder repair service\u003c\/a\u003e.\u003c\/p\u003e","brand":"FANUC","offers":[{"title":"Used (90% New)","offer_id":67593768337623,"sku":"A20B-8200-0143-used","price":248.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/3784\/4183\/files\/fanuc-a20b-8200-0143-servo-encoder-main.webp?v=1790672976","url":"https:\/\/reacocnc.com\/products\/fanuc-a20b-8200-0143-servo-motor-encoder","provider":"REACO CNC","version":"1.0","type":"link"}