公开(公告)号：US20210134633A1

公开(公告)日：2021-05-06

申请号：US17082777

申请日：2020-10-28

Applicant: SEMES CO., LTD.

Inventor： Gon KIM ,  Dong Hwan KIM ,  Sang Hoon BAEK ,  Jung Wan HONG ,  Young In KIM

IPC: H01L21/67 ,  G06F3/12 ,  B41J2/045 ,  B41J2/44 ,  B41J29/393 ,  B41J23/02 ,  H01L21/677

Abstract: A mark printing device includes a driving unit driving along a driving rail of an overhead hoist transport, a printing unit being configured to print on the driving rail a mark for guiding a motion of a vehicle, a data processing unit receiving design data including design information of the driving rail and first information on a position and type of the mark from a server, an encoder unit being configured to calculate a rotation amount of a servo motor provided in the driving unit to detect a current position of the driving unit and a driving distance of the driving unit, and a control unit being configured to control the driving unit and the printing unit to print the mark on the driving rail by using the design data and second information on the current position and the driving distance of the driving unit.