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Not printing straight lines

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Dave Bruce

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Post Thu Nov 20, 2008 11:55 am

Not printing straight lines

When my Roland prints a straight line it is distorting it so it looks like it has been pinched in places, any ideas as to correct it? Lines are 2mm wide.

Cheers

Dave
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DavidRogers

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Post Thu Nov 20, 2008 12:03 pm

It wouldn't happen to coincide with the areas that when the material has buckled UP slightly with the heat?

If the material is closer to the head the spread will be slightly reduced.

if it's not that...dunno!
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Gavin MacMillan

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Post Thu Nov 20, 2008 12:52 pm

what direction are the lines going? Could be a dirty encoder strip

Gavin
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Shane Drew

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Post Thu Nov 20, 2008 1:15 pm

you printing uni or bi directional?

how much does it print before it narrows..... the width of the head?

How many passes are you printing. 4 or 8?

if you print 4, does it print better with 8 pass?

what colour are the lines? one colour or made up of all 4?
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Andrew Ritchie

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Post Thu Nov 20, 2008 1:26 pm

I would also say that its a dirty encoder strip.
Easily cleaned with a dry lint free cloth.
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Dave Bruce

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Post Fri Nov 21, 2008 11:40 am

Thanks guys, I cleaned the encoder strip and tried again, but still no joy. The narrow points are on both horizontal and vertical lines, printing bi directional 8 passes.

Cheers

dave
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Gavin MacMillan

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Post Fri Nov 21, 2008 11:49 am

Hi Dave, is it in the same places each time? Did it move after cleaning the encoder strip... maybe you missed a spot or didn't get the back?

Can you post up a pic, is the test print ok?

G
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Dave Bruce

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Post Fri Nov 21, 2008 12:03 pm

That's interesting it seems to be at the same point on the file, but not the printer, so there must be a communication problem, is that right?

Dave

scan in portfolio thread
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Gavin MacMillan

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Post Fri Nov 21, 2008 12:25 pm

Very odd, how were the lines created?

Want to fire over the file and I'll try it here for you?

G
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Dave Bruce

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Post Fri Nov 21, 2008 12:39 pm

created in Signlab 7

File on its way

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Dave
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Gavin MacMillan

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Post Fri Nov 21, 2008 1:11 pm

E-mailed you Dave.

It printed perfect though so if anyone else has an idea?

G
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Chris Wool

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Post Fri Nov 21, 2008 1:24 pm

shane has a point

are you doing bi directional as i did have a small file once that printed correct in uni dir not in bi, misshaped small circles.

chris
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Dave Bruce

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Post Fri Nov 21, 2008 6:53 pm

tried everything now Chris, but no joy

Dave
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Chris Wool

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Post Fri Nov 21, 2008 7:49 pm

have you tried a different make of vinyl can be any make or light colour
only need to print say the middle part.

chris
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Dave Bruce

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Post Fri Nov 21, 2008 8:01 pm

I have tried it on clear and white, different makes. sent it to someone else who printed it fine.

dave
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Nick Minall

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Post Fri Nov 21, 2008 8:18 pm

when you print it is it always exactly the same? all identical?
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Chris Wool

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Post Fri Nov 21, 2008 8:27 pm

how were the lines created are they single line with pen width or a oblong with fill
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Dave Bruce

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Post Fri Nov 21, 2008 9:47 pm

oblong with fill then welded to the curves

Cheers

Dave
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Chris Wool

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Post Sun Nov 23, 2008 1:17 pm

then welded to curves :o i think as dave rolands hinted that the straight lines are not straight lines.

out of interest go in to the drawing and select lines that should be straight and see if they are curves but look straight.
i think that different outputs and rips may see them slightly differently.

chris

:oops: just looked at the other thread and steve has similar ideas.
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Steve Morgan

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Post Sun Nov 23, 2008 1:27 pm

Just found that this thread is going on elsewhere. I think the problem could be the nodes. SignLab seems to introduce nodes in strange places when you weld lots of bits together. I would be inclined to check to see if you've got curve nodes where you should have straight nodes or curve to straight nodes.

Steve
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David Rowland

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Post Sun Nov 23, 2008 2:18 pm

not i seen this thread, it starting to make sense...

Rob, you really do need to enable posting of JPG's for all paying members, sorry to shout like this but it so easy to do and then we wont have two threads on the same thing.


I am presuming it is something to do with how the file is Imported into SignLab, if other people are printing it okay then I am presuming the file is 'generated' from a family tree software as EPS then imported into SignLab where is miss-interpreting the lines.

Perhaps the person who can print it okay, post up the file so DaveB can download it and use that instead at his rip level.
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Dave Bruce

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Post Sun Nov 23, 2008 2:30 pm

Dave please read all the thread, I created the file in Signlab sent the signlab file to another sign company and they printed it OK (so they say) but don't know how they printed it, ie from Signlab or through another rip.



Cheers

Dave
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Dave Bruce

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Post Sun Nov 23, 2008 4:21 pm

All sorted now, see other thread.

Thanks to everyone who took the time to offer advice, just another example of how this site is invaluable.

Cheers

Dave
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Gavin MacMillan

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Post Mon Nov 24, 2008 9:09 am

I printed it from signlab p&c rip with no probs. Did you get it going on your own printer in the end Dave?
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Dave Bruce

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Post Mon Nov 24, 2008 10:12 am

Yer thanks Gavin, printed fine eventually after the polygon conversion, just don't understand how you printed it ok from the original file and I couldn't, makes me think SL is a bit suspect.

Cheers

Dave
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Gavin MacMillan

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Post Mon Nov 24, 2008 10:30 am

Yeah, I read the other thread. Only thing I can think of is that I had to import it rather than open it, maybe because you have done a more recent update or something? Maybe the importing altered the nodes?

Just checked, they have come in as polyarcs... can't remember what the other threat said now though!

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