Junbeom Lee Email & Phone Number

Hwaseong, Gyeonggi, South Korea

Lead OHT Development - OHT Mechanical, Electrical, Control System Design - Components, Parts and Sensor - Cost Reduction and Part Dualization

대한민국 경기도 화성시

Led Automation Motion Control System(HW & FW) - IPC, Controller(SW, HW), Servo motor, Servo Driver, Control board(ECAT Master & I/O Slave), Power(HID), PLC, Simulation(OHT rail layout, max capacity)- OHT, STK, Conveyor control system

대한민국 경기도 화성

Motion Control SW(FW), Logic, Simulation for OHT(Overhead Transport) - Motion trajectory (minimum jerk & sinusoidal & trapezoidal & etc) - Approaching control logic and Simulation(Python) to avoid collision - Application motion control using motion drivers - Logic to prevent OHT errors by position encoder noise - Vibration control, Modern nonlinear control for OHT(sliding mode control and Input shaping filter) - Servo motor, Servo driver and Accessories - Leading OHT control developmenet(Servo and Control)

평택

- FW for EtherCAT Servo driver and PLC for TwinCAT- Servo driver FW for 3 phase AC Linear motor driver (CiA402, Analog encoder, controller, data dump)- SW for LCM(Linear conveyor module) system's control and monitoring using C++

Yong-In, South Korea

Responsibility for firmware design and development as a servo engineer - Initially developed a mule drive(KM9) using Seagate Servo FW(platform code) with engineers in The States as I joined Seagate - Embedded FW coupled with Servo SoC(Tyco) / Servo Channel(BroadCom, Marvell) . Implemented 4 zoned servo F/W for 2.5"(M10P,M11P) and 3.5"(V9, V11, V11X) . Managed pattern quality related to timing using SoC(Tyco) and BroadCom Channel functions . Developed FW to improve head switching algorithms to overcome mechanical distortion by temperature change . Developed seek recovery FW to overcome servo patterns misaligned in timing using SoC/Channel functions. . Servo calibration FW especially to compensate servo timing error between heads - Tuned Analog / Digital filters for servo signal processing on Channel - Strong responsibility in FA about servo signal using Scope - Collaboration with Vendor engineersEnglish Skills for conference call, presentation and collaboration work

Suwon

Responsibility for firmware design and development as a servo engineer - Designed Seek Trajectory / Seek Controller / Position,Velocity Estimator for all of Samsung 1.8" platform HDDs . Improved seek settle performance . Implemented FW of multiple sinusoidal trajectory seek(MSS) for 1.8" platform HDDs to improve seek performance - Servo F/W . Servo Calibrations (Bias,VCM Kt, Bandwidth and etc) . Improved Servo Flaw Scan FW to map out bad servo tracks . Designed and developed 4 zoned Servo FW (coupled with SoC/Channel) . Self diagnostic FW to screen HDDs which have mechanical problems using FFT/Bode/Seek - FA (Process / Reliability / Field ) and Yield improvement

Suwon, South Korea

Master'S Degree, Electronics(Control Engineering)

Position Control of a Mobile Inverted Pendulum on Inclined Plane - Modeling Inverted pendulum as 4th state space equation - Design Servo.

Bachelor'S Degree, Electronics

Activities and Societies: ROTC