PREFACEThe rapid progress being made in today’s automation and informationtechnologies is resulting in a growing need for even more-advanced motioncontrol for future high-tech equipment. The end result is a need for devicesthat can provide more-precise and quicker motion at higher speeds. Servocontrol technology makes this possible. Launched by Yaskawa in 1993, theΣ Series consists of innovative AC Servos that were developed usingleading-edge servo control technology.This manual covers all products information on the Σ Series SGMj/DR2,which feature superior functions and performance. This manual wasdesigned to provide comprehensible information for users who are about touse a servo for the first time as well as for users who already haveexperience in using servos. This manual enables users to understand whatΣ-Series AC Servos are all about and how to design, install, operate, andmaintain a servo system. Keep this manual in a convenient location andrefer to it whenever necessary in operating and maintaining the servosystem.YASKAWA ELECTRIC CORPORATIONGeneral PrecautionsS Some drawings in this manual are shown with the protective cover or shields removed, in order todescribe the detail with more clarity. Make sure all covers and shields are replaced before operat-ing this product.S Some drawings in this manual are shown as typical example and may differ from the shippedproduct.S This manual may be modified when necessary because of improvement of the product, modifica-tion or changes in specifications.Such modification is made as a revision by renewing the manual No.S To order a copy of this manual, if your copy has been damaged or lost, contact your YASKAWArepresentative listed on the last page stating the manual No. on the front cover.S YASKAWA is not responsible for accidents or damages due to any modification of the productmade by the user since that will void our guarantee.
