NovaJet 500/630/700 Series Service Manual
If the test file prints correctly, the problem lies in either the software package that generated the print or the RIP, if used.
A simple test to determine if the banding is caused by the computer/ RIP/application or the printer is to rotate the image 90 degrees and see if the banding rotates or remains in the same orientation as the previ- ous print. If the banding does not rotate, then look for causes in the printer. If the banding does rotate with the image, then look for causes in the computer/RIP or application.
Common Banding Causes
1.Uneven drying. Adjust the drying time to compensate for varying ink percentages and media types. Dry time values range from 10 seconds to 60 minutes. This is especially important in higher humidity environments.
2.The RIP (Raster Image Processor) and print cycles. We recommend printing to a file first and then queuing the file to the printer to avoid the RIP and print cycle delays that can cause banding while printing.
3.Uneven inkjet kogation (partial clogging or orifice restriction) on the inkjet cartridge head nozzles. Run the 100% color test and
4.Lower quality print modes normally cause slight bands, to avoid this banding, switch to
5.Air bubbles in the ink delivery system. This indicates a loss of negative pressure within the ink cartridge or ink delivery system, check all quick release fittings and connections for possible leaks and ensure that the cartridge is primed properly.
6.Improper priming. The lower secondary chamber within the cartridge may
