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roland print head problem help please

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Post Wed Dec 20, 2017 12:38 am

roland print head problem help please

hi guys anyone seen this before, left something to print, came back and it had over printed the whole print with what i can only describe as a grey dirty overprint, tried doing a head clean etc and powerful cleans but nothing is changing it, any help appreciated please, tia
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Last edited by Shawn Bentley on Wed Dec 20, 2017 10:53 am, edited 1 time in total.
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Post Wed Dec 20, 2017 10:19 am

Re: roland print head problem help please

Looks to me like an electrical fault on head 2. Could be slider or cable fault but most likely head I’d say. Is it a Pro? XF/XJ?
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Post Wed Dec 20, 2017 10:40 am

Re: roland print head problem help please

Hi Stafford thanks it’s a EJ640, I printed a cmyk price on high quality backlit so was 32 pass just after and solved it and it just went away ? But I have not clue what it was ?, something I noticed when cleaning heads etc on maintenance mode was that the side gaurd and the strip just before the bed finishes towards where the head sits was covered in ink so it was like it had printed on the metal guard and the printer bed? Hope this helps ps I've added a new test print this morning and has 2 nozzles missing on the magenta which is giving me slight banding with reds and pinks, i can't get rid of them with powerful cleans etc i there a better way to free up these nozzles? tia
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Post Thu Jan 04, 2018 12:05 pm

Re: roland print head problem help please

to shawn bentley: i had similar problem and it was removed by head alignment, bit pro job but that sorted for me. also i have noticed many printers miss calibration test after loading any media. that's very important for nozzles to fire in sync.
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Post Thu Jan 04, 2018 1:20 pm

Re: roland print head problem help please

hi khaled,thanks for that info will get a service engineer to sort it, thought it may be something to do with the aligninment. many thanks shawn
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Post Sat Jan 06, 2018 12:09 am

Re: roland print head problem help please

Shawn
a dirty encoder strip can cause random printing and from what you are saying may be your issue. Probably worth giving it a clean with a lint free cloth see if it helps.

Kev
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Post Sat Jan 06, 2018 12:10 am

Re: roland print head problem help please

Cheers Kevin where the encoder strip on the ej640 do u know? Happy new yr mate hope u had a good one
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Post Sat Jan 06, 2018 12:54 am

Re: roland print head problem help please

Hi Shawn Happy New Year to you as well mate, never worked on an EJ but unless its been replaced with an encoder on the scan motor its got to run the length of the printer normally around the vicinity of the linear rail the carriage rides on. As i said its not unheard of that the strip gets dirty from print dust and throws up random issues

Kev
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Post Sat Jan 06, 2018 12:55 am

Re: roland print head problem help please

That’s cool just googled it lol few utube videos on it, will try that thanks mate

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