How to do EPSON PRINTER print receipt (BILL) text with same left spacing margine and right spacing margine ?

In below image text left margine is less and right side margine is high so how to do same size in margine ?

I am using this library code

var builder = new epson.ePOSBuilder();
    builder.addTextLang('en');
    builder.addText(textFormatForNotes('vikas katariya'));