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what are the potential reasons why my roland printer bands?
what are the fundamental reasons why a printer bands?? is it soley to do with calibration or are there other factors. what can i do to solve these issues to maintain quality of prints?? sometimes no matter what i try i cant solve issues of banding. I have even tried defaulting the printer to factory setting but no joy there. i have a versacamm sp300v. would luve to get this issue out the way. are there any tutorials out there??
thank you
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11 Replies
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There’s a whole host of questions to your question I’m afraid. Is it horizontal or vertical banding? Is the test draw 100%? Have you set up your feed adjustments? Are you using a takeup? What heat setting are you using? What resolution/pass rate……..??
Sorry to answer with so many questions, but a picture says a thousand words…
Stafford
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calibration of heads, calibration of passes, misfiring heads / missing nozzles, poor alignment between the pair of heads.
Dave
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I think alot of people just let it go like that, we have see customers vans, where the banding is terrible.
It was one of the reasons we sold our cadet and went for a mimaki.
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There are various types of banding.
If it is regular, straight lines across the media, you have probably got head issues, blockages or misfiring, or dirt on the heads.
If it is irregular lighter areas and darker areas, in bands across the media you may have the wrong profile for the media, and / or (specially if using a flexible media like a banner vinyl) the media flexing as it passes through the rollers, sometimes made worse by the media clamps holding it back or it may be catching on something.
If you have a line or more along the length of the media, you might have a bit of dust on the encoder strip.
We have had all these issues in the past, and solved them by trial and error, coming on this forum for advice like you are doing, and /or paying a fortune for a techie to sort it out! -
On the few occasions that my machine has produced banding it has always been a nozzle not firing correctly and a ‘clean cycle’ cured it. So you could start with printing a nozzle check first.
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on an Avery online training video, they explained that a too high temperature could also cause banding. Ink is dried to early before the next head pass.
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thanx for all your replies,
the banding tends to appear only on the black colour horizontally. all other colours are fine. there are various tests as it appears. Not sure how to carry them out though 🙄
How many tests could i do to diagnose the issues?
From what I gather it could be the following :
misfiring nozzles due to blockage – solution would require a head clean
calibration of head pass (when you calibrate the 2 squares against the space in between) solution meet the 2 squares as close as possible.
cmyk calibration ( when calibrating the small lines on the four colours seperately by choosing the closest number of straight line) solution calibrating to straight line on each colour.
heat setting – what is a good heat setting?. solution right heat setting.
profile setting- currently use for white vinyl on versaworks generic vinyl 2, standard, 720×720, cmyk (v) (whats w pass?), nearest neighbour, bi direction, prepress us.
can anyone add to this?
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Maybe the Bi-Directional setting.
Try setting the printer to Omni Directional to see if it persists.
I know on my RS-640 the Bi-Diretional you can adjust each colour.
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Hi David Theres no option for the omni but there is a uni direction. It never use to band before on the bi direction though.
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In the service mode there is an option for BIAS/Horizontal calibration. If you can run that and post a picture of it I can tell you a whole load about what’s going on.
Stafford
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We have to pull some vinyl off the roll before it goes through the versacamm otherwise we always seem to get banding – more noticeable on the darker colours
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