Gerber files for the power planes

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Ashwath Pavithran wrote:

Ben & Paul,

 

Thank you. You guys are doing a great job.

 

I found that I get the warning "0 size aperture used" only when I import

the

silk screen layers. I hope this is fine.

 

The board outline may be of zero width. But many component's silkscreen

are under 8 mil width and need to be adjusted by fixing the components

an after the fact ULP.

There is another problem that I have. I have no components mounted on the

bottom side. So the cream frame solder layer is empty. But when I import

this layer to GC Preview, I get lot of error messages. Also

the tool asks if I want to add a drill hole (which really doesnt exists )

that it found in the layer. Is this a bug with this tool. Can I safely

ignore it. Do I need to send *.crc & *.crs file to the board house ?

 

If you don't have bottom smd's the file should be almost empty and you

don't need to generate or send it.

I don't use GC Preview so I have no idea but if the file has no data

that could cause errors.

You can look at the Gerber output to check it.  What I do is modify the

too small tool size to something very large then then look at the result

with a viewer to see what and where it is then fix the offending component.

Once again, thank you for all your inputs.

 

Regards,

Ashwath

 

Paul R.

Ben & Paul,

Thank you. You guys are doing a great job.

I found that I get the warning "0 size aperture used" only when I import the

silk screen layers. I hope this is fine.

There is another problem that I have. I have no components mounted on the

bottom side. So the cream frame solder layer is empty. But when I import

this layer to GC Preview, I get lot of error messages. Also

the tool asks if I want to add a drill hole (which really doesnt exists )

that it found in the layer. Is this a bug with this tool. Can I safely

ignore it. Do I need to send *.crc & *.crs file to the board house ?

Once again, thank you for all your inputs.

Regards,

Ashwath

"Ben" <frank.dannull@meinberg.de> wrote in message

news:gubgbj$4tc$1@cheetah.cadsoft.de...

Hello,

 

the warning "0 size aperture used" is displayed because one of your Gerber

files (I suppose it's the dimensions layer) includes a wire that has a

width of "0" (zero) and the RS274X Gerber tool of Eagle generates an

aperture of "0" therefore.

But an aperture with width of "0" is physically not possible for a

photoplotter. That's why GC Preview generates this message.

So, you can ignore it if the "width 0 wire" is in the dimensions layer.

 

You don't need to use "Mirror" for the output of layers related to the

solder side...

 

 

Ashwath Pavithran schrieb:

Hi,

 

I generated the gerber files for my 4 layer PCB using 'gerb274x-4layer'

cam job. The inner two layers are gnd & power plane respectively.  But

when I view the gerber files for the inner layer, I dont see it flooded

with copper. Is this how it is supposed to be ?  I am able to see the

copper pour on the top and bottom layers.

 

While importing the files to cam viewer, I get the warning ' 0 size

aperture used' . Should I ignore it? How can this be corrected ?

 

I am new to PCB layout, so I apologize if my question are very amatuer.

 

Thank you.

 

Regards,

Ashwath

Hello,

the warning "0 size aperture used" is displayed because one of your

Gerber files (I suppose it's the dimensions layer) includes a wire that

has a width of "0" (zero) and the RS274X Gerber tool of Eagle generates

an aperture of "0" therefore.

But an aperture with width of "0" is physically not possible for a

photoplotter. That's why GC Preview generates this message.

So, you can ignore it if the "width 0 wire" is in the dimensions layer.

You don't need to use "Mirror" for the output of layers related to the

solder side...

Ashwath Pavithran schrieb:

Hi,

 

I generated the gerber files for my 4 layer PCB using 'gerb274x-4layer'

cam job. The inner two layers are gnd & power plane respectively.  But

when I view the gerber files for the inner layer, I dont see it flooded

with copper. Is this how it is supposed to be ?  I am able to see the

copper pour on the top and bottom layers.

 

While importing the files to cam viewer, I get the warning ' 0 size

aperture used' . Should I ignore it? How can this be corrected ?

 

I am new to PCB layout, so I apologize if my question are very amatuer.

 

Thank you.

 

Regards,

Ashwath

Ashwath Pavithran wrote:

Hi,

 

I generated the gerber files for my 4 layer PCB using 'gerb274x-4layer'

cam job. The inner two layers are gnd & power plane respectively.  But

when I view the gerber files for the inner layer, I dont see it flooded

with copper. Is this how it is supposed to be ?  I am able to see the

copper pour on the top and bottom layers.

 

While importing the files to cam viewer, I get the warning ' 0 size

aperture used' . Should I ignore it? How can this be corrected ?

 

I am new to PCB layout, so I apologize if my question are very amatuer.

 

Thank you.

 

Regards,

Ashwath

If you have the inner layer check as power then the gerber output is

inverted. So what is drawn is the areas that have no copper.

You have to set your viewer to compensate. Not sure on the 0 size problem.

If you need any traces on the inner layer use a normal layer and

polygons for the fill as it is much simpler to see what you have that way.

Paul R.