Epson ColorWorks C3400-LT Technical Reference Guide - Page 166

Gap Adjustment This is for adjusting misalignment in vertical lines and barcodes, and misalignment in paper feeding. Since gap adjustment is performed when the product is shipped from the factory, typically, the customer does not need to perform the adjustment. If the print position when the print head moves from right to left is misaligned with the print position when the print head moves from left to right, vertical lines may become misaligned or the print result may become blurry. In addition, if the paper feed amount is not adjusted correctly, white bands may appear in the printout or the printout may become overlapped. In such a case, perform gap adjustment. Before performing gap adjustment, be sure to load the label roll paper that was shipped with the product. If paper other than the label roll paper that was shipped with the product is loaded, the gap adjustment cannot be performed. For details on how to replace paper see "Replacing the Paper" on page 139. When an image or the like is printed, there may be cases where white bands (lines that appear to be white) or black bands (image overlap) may be printed every 2 to 3 cm. This effect can be mitigated by performing gap adjustment, but it cannot be completely eliminated. Gap Adjustment Operation Procedure Perform gap adjustment by following the steps below. 1 Turn on the power of the printer. 2 Display the window on the printer driver. (See "How to Use the Printer Driver" on page 65 for how to display the driver window.) 3 In the [Driver Utilities] tab, click [Driver Preferences]. 4 The "Driver Preferences" screen will be displayed. Check the [Enables The Advanced Function On "Maintenance And Utilities" Tab] checkbox and click [OK]. 5 In the [Maintenance And Utilities] tab, click [Print Head Alignment]. For the rest of the procedure, follow the instructions on the screen. 166