The Letter marking system is a marking operation for transferring and displaying a drawing on an iron plate. The contents are very diverse based on the form and drawing of the iron plate. Automation has been difficult so far because several parts have to be confirmed directly. Automation basically reduces or eliminates the confusion of errors that are generated manually.
It is also possible to shorten the accuracy of work and the time required for iron plate processing. Therefore, in this study, by executing the structural analysis of a letter marking system, which can be produced in accordance with the requirement for obtaining the width and height of the letter marking, it attempts to verify the safety of the proposed system.