GP-3120TL是条码打印机，它只负责打印。生成条形码的话需要用到条码生成软件，在条码生成软件中生成你想要的条码。条码生成软件你可以选择专业的条码软件，比如：条码标签打印软件，也可以用网上的在线条码生成器。专业的条码生成软件各种打印机通用，支持普通打印机（彩色喷墨或激光打印机）条码打印机、数码印刷机、喷码打印机以及喷绘写真机等，这里主要介绍的是GP-3120T条码打印机，下面介绍下条码生成软件生成条形码并连接GP-3120TL条码打印机进行打印的步骤：
1.打开条码生成软件，设置一下纸张和标签的尺寸。
2.点击软件左侧的”绘制一维条码”按钮，在画布上绘制条形码对象，双击条形码，在图形属性-条码-类型中，可以设置条形码的类型（根据自己需求自定义进行设置），这里设置条码类型为code 128。
3. In the graphical properties - data source, click on the "Edit" button to bring up the "Data Manager Dialog", the types of data objects, select "data object type" needs, such as: "manual input into the database, the date and time , sequence generation, randomly generated, input printing data references, scripting "and the like (can be set to customize), date and time selected here. As long as years, months, days, minutes and seconds can be put back to delete, click Edit - OK. Bar code is generated. 
4. Final results as shown: 
The above is a step in the barcode generation barcode generation software, there is very simple. In Lang barcode generation software supports more than 120 bar code, two-dimensional code type, the software is used in the driving module width DPI optimization algorithm, enhanced control accuracy of the output bar code, bar code recognition rate of class A, then good production, may be connected GP -3120TL bar code printer.