Straition lines printing in filled areas

I have not discovered the definitive answer, so I am bumping up the queue, to keep the thread fresh.

On 27.05.2015 23:34, Tee Dunn wrote:

I have not discovered the definitive answer, so I am bumping up the

queue, to keep the thread fresh.

 

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Can you post a screenshot of what you see? I can't see lines in the pdf

you attached. Are you printing the pdf direct, or do you print direct

from Eagle to whatever device you got?

If you get white lines in the fill, it probably have to do with

precision and rouding effects. I've had issues with gerber files

outputted with too low (standard!) resolution causing a fill-line to

appear a tiny unit below the one above.

The Eagle fill does add some overlap and there have been discussions

earlier about increasing it, but not sure if anything happened (try

check the manual). In fact the overlap used to be too small for the

standard gerber res. It just got rounded off.

My workaround was always to output gerbers with 6 decimals, however, for

PDF I wouldn't know what to do. You could try the free "pdf creator"

printer driver and set higher dpi maybe.

Hi! Thanks for your help...

Can you post a screenshot of what you see? I can't see lines in the pdf you attached.

Scroll up to post #4 and click on the graphics to expand them to full screen. Look at the black pad that is in the group. You can see it there.

Are you printing the pdf direct, or do you print direct from Eagle to whatever device you got?

I have printed it both ways and I get the lines both ways.

The Eagle fill does add some overlap and there have been discussions earlier about increasing it, but not sure if anything happened (try check the manual). In fact the overlap used to be too small for the standard gerber res. It just got rounded off.

I have not been able to find the function to change the overlap... This function is exactly what I need... I have done lots of looking for it... Can you find it and point me to it?

Thanks so much for your interest!

On 28.05.2015 10:31, Tee Dunn wrote:

Hi! Thanks for your help...

 

+Can you post a screenshot of what you see? I can't see lines in the pdf

you attached.+

Scroll up to post #4 and click on the graphics to expand them to full

screen. Look at the black pad that is in the group. You can see it

there.

 

+Are you printing the pdf direct, or do you print direct from Eagle to

whatever device you got?+

I have printed it both ways and I get the lines both ways.

 

+The Eagle fill does add some overlap and there have been discussions

earlier about increasing it, but not sure if anything happened (try

check the manual). In fact the overlap used to be too small for the

standard gerber res. It just got rounded off.+

I have not been able to find the function to change the overlap... This

function is exactly what I need... I have done lots of looking for it...

Can you find it and point me to it?

 

Thanks so much for your interest!

What device are you printing to? The screenshot in #4 was a bit low

resolution and ends up looking like a scanned print from an old

fashioned dot matrix printer or some ink jet printer with a dirty head.

As I mentioned for the overlap, there was just talks about it. I dont

know if they even have a parameter for it, you gotta check the manual ,

or old postings yourself.

I opened your project in 6.5.4 and saw some lines on the pdf at some

scaling factors, but when zoomin in, they disappear. I guess this is

because of rounding errors in pdf viewer's scaler.

I also did try a print to pdf creator but end up with the same artifacts

when scaling. I suspect that Eagle prints to pdf in too low resolution

to cover the overlap, even if it appears to do 1200dpi.

PS:If you plan to print this onto transparent sheet for photoresist

transfer, I suggest you mirror it and lay the printed side toward the

pcb. This gives better focus. But I guess this is old tech these days.

On 28.05.2015 10:31, Tee Dunn wrote:

Hi! Thanks for your help...

 

+Can you post a screenshot of what you see? I can't see lines in the pdf

you attached.+

Scroll up to post #4 and click on the graphics to expand them to full

screen. Look at the black pad that is in the group. You can see it

there.

 

+Are you printing the pdf direct, or do you print direct from Eagle to

whatever device you got?+

I have printed it both ways and I get the lines both ways.

 

+The Eagle fill does add some overlap and there have been discussions

earlier about increasing it, but not sure if anything happened (try

check the manual). In fact the overlap used to be too small for the

standard gerber res. It just got rounded off.+

I have not been able to find the function to change the overlap... This

function is exactly what I need... I have done lots of looking for it...

Can you find it and point me to it?

 

Thanks so much for your interest!

What device are you printing to? The screenshot in #4 was a bit low

resolution and ends up looking like a scanned print from an old

fashioned dot matrix printer or some ink jet printer with a dirty head.

As I mentioned for the overlap, there was just talks about it. I dont

know if they even have a parameter for it, you gotta check the manual ,

or old postings yourself.

I opened your project in 6.5.4 and saw some lines on the pdf at some

scaling factors, but when zoomin in, they disappear. I guess this is

because of rounding errors in pdf viewer's scaler.

I also did try a print to pdf creator but end up with the same artifacts

when scaling. I suspect that Eagle prints to pdf in too low resolution

to cover the overlap, even if it appears to do 1200dpi.

PS:If you plan to print this onto transparent sheet for photoresist

transfer, I suggest you mirror it and lay the printed side toward the

pcb. This gives better focus. But I guess this is old tech these days.

1) The striations appear no matter what printer I am using. The striations also appear, if I print to pdf.

2) I am aware of the creed that I am responsible to do my own research. I have spent several hours digging through the internet and reading the manual. Since I could not find the answer, I asked for help, here. I was just hopeful that, if you thought you had seen the answer, you might remember where you saw it, or that you might be able to find it, if you looked, again. I don't know where you looked, so I can't go to those locations and look for myself... That is why I asked for you to give it another look.

3) Good tip on printing a transparency.

Thanks for your continued help.

On 29.05.2015 02:28, Tee Dunn wrote:

1) The striations appear no matter what printer I am using. The

striations also appear, if I print to pdf.

2) I am aware of the creed that I am responsible to do my own research.

I have spent several hours digging through the internet and reading the

manual. Since I could not find the answer, I asked for help, here. I was

just hopeful that, if you thought you had seen the answer, you might

remember where you saw it.

3) Good tip on printing a transparency.

 

Thanks for your continued help.

I tried printing your pdf to a printer, and there were no lines visible.

It was black and solid.

Maybe the lines on the pdf is a pdf viewer issue only?