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ISGS_Craig
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T7200 Banding and Tearing Issues

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T7200 Plotter

2 issues

1– The printed image gets a “banding” pattern of light and dark colors.

2 – The service station (printhead carriage) gets caught on the leading edge of the paper when trying to print something and tears the paper.

 

I’ve been through all the calibration and printhead alignments and nothing has fixed the issues.

 

Thanks for help – Craig

3 REPLIES 3
Shwetha
Level 3
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Dear Customer

 

1.Issue releated to print head might cause banding check for print head clean and alignment

if they are out of warranty replace and check.

 

2. Service station has no role while printing, it has no contact with media.

paper can get tear by cutter .nothing else can damage the media,

still you can try to load the media and do relevant settings .

 

Regards

HP

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Vijay_C
Level 3
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Hi Craig,

 

Banding is related to Print head , Correct media loading on the plotter, Correct media selection on the Front panel of the plotter and also on the printer driver.  Different media has different ink limits.

 

If the above is confirmed, print an image diagonistics print from the plotter :

found under image quality maintenance  > print diagonistics image.

check all the color blocks , if issue is noticed on any one color or all color.

check for the print head usage and warranty limitation  ( Use by date on the print head ) and replace accordingly.

Try a print head cleaning and print head alignment.

 

For Leading edge getting torn.

some times the pinch wheels can put pressure on the leading edge and cause a dogear fold and the carriage can crash.

Carriage crashing on media also can cause damage to the print heads and result in banding

check for the line sensor / loosely fixed sensor on the carrige crashing on the media.

 

If media is lifting from the platen / printing area, try increasign the Vacume pressure on the printer.

found under settings > Altitute settings > Increase from 2000 mt and above.

 

Hope this is helpful.

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ISGS_Craig
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Well the banding issue has been resolved but we are still having the paper tearing issue. I tried the recommendation of increasing the vacuum pressure but it hasn’t solved the problem. As before we can plot sometimes a few items before the print head carriage starts rubbing the edge of the paper but most times its instant (about a foot into a plot).

 

We can plot just fine on thicker types of paper but the regular coated types are where we are having this problem no matter what the width is. The plotter is in a temperature and humidity controlled room so I don't think it can be an environmental problem. Any suggestion on a possible problem?

 

Thanks - Craig

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