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Roland RF-640 banding left side of machine

R

RafalASC

New Member
Hello,

I have problem with Roland RF-640 - banding on the left side of the machine. On the right side everything is ok but on the left side You can see banding (look at picture). It is in every quality of print in bi-dir, but when I print this in uni-dir everthing is ok. Do You have any solution for this kind of issue?

photo: Beznazwy 1
 
shafi

shafi

New Member
RafalASC said:
Hello,

I have problem with Roland RF-640 - banding on the left side of the machine. On the right side everything is ok but on the left side You can see banding (look at picture). It is in every quality of print in bi-dir, but when I print this in uni-dir everthing is ok. Do You have any solution for this kind of issue?

photo: Beznazwy 1
Click to expand...
pleas check encoder strip ( try to clean)
 
PaperSpoon

PaperSpoon

Head of Production
Interesting. I have the RF640 as well and it does the same thing. Any wide prints are in a higher quality which stops the banding for me. But a standard or high speed print is always noticeable only on the left side. Ill be following this thread
 
flyplainsdrifta

flyplainsdrifta

New Member
have this on an xf640, but only really noticeable in the lighter cyan gamut...anyone else? i always thought it was due to not having lc and lm but no clue. not as familiar with roland machines.
 
Solventinkjet

Solventinkjet

DIY Printer Fixing Guide
+1 on starvation. What he means is not enough ink is flowing to the head fast enough to keep printing solid. I would start by changing at least the cyan dampers. That should fix the issue. I have seen this exact issue happen on a Mutoh and it ended up being a partially clogged manifold. Anything that will keep the ink from flowing freely will cause this issue.
 
flyplainsdrifta

flyplainsdrifta

New Member
fun. get to learn more about roland's now. how difficult is it to change out dampers? sorry for the rookie question but ive honestly no clue. could talk about hp's all day but i only know basic stuff with my roland.
 
R

RafalASC

New Member
VanderJ said:
+1 on starvation. What he means is not enough ink is flowing to the head fast enough to keep printing solid. I would start by changing at least the cyan dampers. That should fix the issue. I have seen this exact issue happen on a Mutoh and it ended up being a partially clogged manifold. Anything that will keep the ink from flowing freely will cause this issue.
Click to expand...

Damper is not possible - I have this machine 1 month and it is from beginning.

hand851 said:
Feed roller is not installed properly.
Click to expand...

It cant be installed impreperly. I checked on different media, pieces of media, with take up, without take up.

The only solution is uni-dir, I try to print in bi-dir and slow down the carriage to something about 400 in VersaWorks and nothig, but in uni-dir with speed 1000 everything is ok.
 
PaperSpoon

PaperSpoon

Head of Production
Well I wouldnt say its not possible. sometimes you get a faulty part right out of the factory... Either way, Ill be ordering some new dampers for mine and will update you all once installed! ;)
 
hand851

hand851

Roland Mutoh & Mimaki inks digiprint-parts.com
Base point to left side of printer and the check feed calibration. Still think it's the feed roller.
 
Charlie J

Charlie J

New Member
BUMP this thread. I've had the same issue with mine since it was a brand new machine. Any ideas for a remedy?
 
E

ewded

.
You can check if it's ink starvation if you set a 1sec pause between scans. (you should be able to set this on the printer) The idea is to let the head go with it's normal speed but let it sit between passes.
 
Charlie J

Charlie J

New Member
Today I replaced the dampers in my machine hoping that it would fix my issue with cyan banding on the left side of the machine.

Any ideas?
 

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