I'm getting a dark line across the width of the label. It appears to be where the print head sits on the label before it prints. Like maybe the print head is heating up too soon and it leaves a line across the width of the label. Any thoughts?
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See if it still happens using a fresh label roll. From the Dymo 450 User Guide the common causes of poor print quality issues.
Poor print quality is most frequently caused by one of the following:
• An old roll of labels
• Labels made by a manufacturer other than DYMO
• Labels where the thermal coating has been compromised
• A dirty print head
First, make sure you are using DYMO-branded labels. Do not use third-party labels because the thermal coating on other labels has a different sensitivity than DYMO-branded labels. Also, the perforated holes between the labels made by other manufacturers are frequently not detectable by LabelWriter printers.
If the print quality becomes faint, small dots of white appear scattered through the printed characters, or light and dark patches of printing appear, you are probably using a faulty roll of labels. Try using a different roll from a fresh box. If the second roll prints correctly, the problem is with the first roll of labels.
Another possibility is that the LabelWriter print head needs cleaning. Every LabelWriter printer comes with a cleaning card. See "Caring for Your Printer" on page 17 for information about the
LabelWriter cleaning card.
The black print head has a few blocked nozzles. Inkjet printers need to be used frequently to prevent ink drying out and blocking the print head nozzles. If the print head cleaning maintenance routine does not clear the blockages, then print head needs replacing, but it may be expensive. It may be more cost effective to buy a later model and better printer than replace the print head.
I'm assuming you mean half is showing up as you go across the label. If that is the case and it's a very clear line where the print is cut off, then check the print width setting through the front panel of the printer. Press SETUP and look for setting called MAX WIDTH. It should be set to 104MM (4") which is the width of the print head. It is set to something smaller if the print is being cutoff.
If the print is fading away as you go across then that it is a print head balance issue. Look at the print head pressure dials on top of the print head assembly to make sure they are set evenly.
It could be a print ehad problem, or an out of alignment condition between the platen and the head.
YOu can use a test mode to print a factory test print, that will put the print across the label. Settings and a barcode for alignment will be pirnted.
If you are using less than full width stock, only print 5 or less labels as the head will try to print across the full width, and if no label present, may harm printhead.
there are adjustments on the outside(right) of the platen support bearing that you can loosen the screw, and cam adjustment, to level the head across the platen.
Try cleaning the black printer heads several times in a row, at least 5 times then print a black document with best quality setting.
Press the ink button, then down to select select cleaning and then press menu/set and menu/set again to select black.
In your label software there should be a setting option for print darkness (I assume it adjusts the head temperature) In ours (bartender) you can get to it when you select 'print' and a window appears with a 'documents properties' button. Click on this and select options and a darkness bar appears which you can adjust. You may also need to slow the label print speed if the darkness adjustment is not enough. I suspect it isn't in the printers best interest to run the print head at maximum darkness/heat so a sensible balance of darkness and print speed is best.
Another, less likely, possibility is an incompatability between the label material or surface finish, and the ribbon type. We did have a problem once whem Homebase changed their price label design and we had to test a load of other ribbon types until we got one that did the job. A chat with the label or ribbon supplier is always usefull, they sent us several sample bits to test.
Width of head sprayer (head output) of black is about 1". Check nozzle. It might be some point of head spayer distort. See check nozzle ouput. There are tranversal and vertical lines that represent same point of head sprayer. Is the output perfectly straight and no clog at all? Do head cleaning procedure.