top and bottom layers do not line up

On 12/30/09 08:31, Tilmann Reh wrote:

Olin Lathrop schrieb:

 

I just checked a canned CAM processor job I have, and apparently Eagle's

reference is the same as what board houses want, meaning all layers are as

if viewed thru the board with the top layer up.  You don't want any of the

Mirror, Rotate, or Upside down boxes checked.  If any of these are the

default, then that's just wrong.  It's been a long time since I set up

template CAM jobs that I don't remember if the Eagle defaults had these

boxes unchecked, or I unchecked them many years ago once.

 

That's exactly the problem. The CAM job that comes with EAGLE has

"mirrored" checked for the bottom layer. Though this has been discussed

here for several years now, and every then and now people ask this same

question, that default has not been corrected yet. People simply take

the CAM job provided with EAGLE and then run into problems.

The default CAM jobs will have the "Mirrored" option unchecked

in version 5.7.0.

Klaus Schmidinger

--

_______________________________________________________________

Klaus Schmidinger                       Phone: +49-8635-6989-10

CadSoft Computer GmbH                   Fax:   +49-8635-6989-40

Pleidolfweg 15                          Email:   kls@cadsoft.de

D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de

_______________________________________________________________

thank you all. I am indebted for all the input. I am just now learning eagle

layout and trying to understand the details of this software. Thanks for

your help

kind regards,

vp

"Terri Miller" <tmiller@sunstone.com> wrote in message

news:hhg2ir$tqj$1@cheetah.cadsoft.de...

 

"Joern Paschedag" <jpaschedag@t-online.de> wrote in message

news:hhflff$9ea$1@cheetah.cadsoft.de...

Olin Lathrop schrieb:

Tilmann Reh wrote on Wed, 30 December 2009 02:31

The CAM job that comes with EAGLE has "mirrored" checked for the bottom

layer.

 

That's a really dumb default since it's opposite of what board houses

want.

It should be the other way around, although it's not a big deal since

it's

easy to change, and you only have to do it once over the lifetime of

using

Eagle.

 

Quote:

People simply take the CAM job provided with EAGLE and then run into

problems.

 

Well, duh!  Someone who can't be bothered to read the docs or even check

their gerber files with a free viewer deserves to get the bottom layer

of

their board flipped.

 

Yeah, and imagine all that stress that it takes to change that setting...

 

--

Gruß / regards

 

Joern

 

Hi all,

 

Quote:

 

Well, duh!  Someone who can't be bothered to read the docs or even check

their gerber files with a free viewer deserves to get the bottom layer of

their board flipped.

 

I respectfully disagree with this statement... being in a postition where

I see many different software users (not only EAGLE) a little perplexed by

generating CAM output, what may seem to be a simple process can be really

confusing.  When you have default options checked that make little sense

and every board shop demanding something different, designing the board

can be only half the battle!

 

Terri

 

"Joern Paschedag" <jpaschedag@t-online.de> wrote in message

news:hhflff$9ea$1@cheetah.cadsoft.de...

Olin Lathrop schrieb:

Tilmann Reh wrote on Wed, 30 December 2009 02:31

The CAM job that comes with EAGLE has "mirrored" checked for the bottom

layer.

 

That's a really dumb default since it's opposite of what board houses

want.

It should be the other way around, although it's not a big deal since

it's

easy to change, and you only have to do it once over the lifetime of

using

Eagle.

 

Quote:

People simply take the CAM job provided with EAGLE and then run into

problems.

 

Well, duh!  Someone who can't be bothered to read the docs or even check

their gerber files with a free viewer deserves to get the bottom layer of

their board flipped.

 

Yeah, and imagine all that stress that it takes to change that setting...

 

--

Gruß / regards

 

Joern

Hi all,

Quote:

Well, duh!  Someone who can't be bothered to read the docs or even check

their gerber files with a free viewer deserves to get the bottom layer of

their board flipped.

I respectfully disagree with this statement... being in a postition where I

see many different software users (not only EAGLE) a little perplexed by

generating CAM output, what may seem to be a simple process can be really

confusing.  When you have default options checked that make little sense and

every board shop demanding something different, designing the board can be

only half the battle!

Terri

Olin Lathrop schrieb:

Tilmann Reh wrote on Wed, 30 December 2009 02:31

The CAM job that comes with EAGLE has "mirrored" checked for the bottom

layer.

 

That's a really dumb default since it's opposite of what board houses want.

It should be the other way around, although it's not a big deal since it's

easy to change, and you only have to do it once over the lifetime of using

Eagle.

 

Quote:

People simply take the CAM job provided with EAGLE and then run into

problems.

 

Well, duh!  Someone who can't be bothered to read the docs or even check

their gerber files with a free viewer deserves to get the bottom layer of

their board flipped.

Yeah, and imagine all that stress that it takes to change that

setting...

--

Gruß / regards

Joern

Tilmann Reh wrote on Wed, 30 December 2009 02:31

The CAM job that comes with EAGLE has "mirrored" checked for the bottom

layer.

That's a really dumb default since it's opposite of what board houses want.

It should be the other way around, although it's not a big deal since it's

easy to change, and you only have to do it once over the lifetime of using

Eagle.

Quote:

People simply take the CAM job provided with EAGLE and then run into

problems.

Well, duh!  Someone who can't be bothered to read the docs or even check

their gerber files with a free viewer deserves to get the bottom layer of

their board flipped.

--

Browser access to CadSoft Support Forums at http://www.eaglecentral.ca

Olin Lathrop schrieb:

I just checked a canned CAM processor job I have, and apparently Eagle's

reference is the same as what board houses want, meaning all layers are as

if viewed thru the board with the top layer up.  You don't want any of the

Mirror, Rotate, or Upside down boxes checked.  If any of these are the

default, then that's just wrong.  It's been a long time since I set up

template CAM jobs that I don't remember if the Eagle defaults had these

boxes unchecked, or I unchecked them many years ago once.

That's exactly the problem. The CAM job that comes with EAGLE has

"mirrored" checked for the bottom layer. Though this has been discussed

here for several years now, and every then and now people ask this same

question, that default has not been corrected yet. People simply take

the CAM job provided with EAGLE and then run into problems.

Tilmann

Terri Miller wrote on Tue, 29 December 2009 15:48

Kind of gets confusing...!  Think looking through the top to the

bottom.

But YES, this board house in particular would love for that default to

be

changed.  We do check them coming in but would prefer the bottom (or

any

layer) not to be mirrored.

The reason this is confusing is because you guys are not giving a reference

for "mirrored".

What board houses want is for all the Gerber files to have the same origin

and the same orientation as if you are looking thru the board from the top

with xray vision to see the stack of layers.  In other words, layer 1 is

written to the Gerber file normally.  The bottom layer is written as it

would appear looking thru the board from the top.  This is the mirror image

of what it would look like if you were holding the board and looking at the

bottom layer.  Whether you call this "mirrored" or not I have no idea.

I just checked a canned CAM processor job I have, and apparently Eagle's

reference is the same as what board houses want, meaning all layers are as

if viewed thru the board with the top layer up.  You don't want any of the

Mirror, Rotate, or Upside down boxes checked.  If any of these are the

default, then that's just wrong.  It's been a long time since I set up

template CAM jobs that I don't remember if the Eagle defaults had these

boxes unchecked, or I unchecked them many years ago once.

--

Browser access to CadSoft Support Forums at http://www.eaglecentral.ca

"Christen Fihl" <look_at_HSPascal.fihl.net@nospam.plz> wrote in message

news:hhcq40$gql$1@cheetah.cadsoft.de...

Ups, maybe I got my mind upside down, myself

Need to rethink when better time

 

Christen

 

 

Kind of gets confusing...!  Think looking through the top to the bottom.

But YES, this board house in particular would love for that default to be

changed.  We do check them coming in but would prefer the bottom (or any

layer) not to be mirrored.

Terri

Ups, maybe I got my mind upside down, myself

Need to rethink when better time

Christen

Christen Fihl schrieb:

You set whether the bottom layer is mirrored in the cam job,

The default is reversed.

...

Board houses actually prefer (or even demand) a simple layer stack,

viewed from the top.

 

That is a good reason for having default as mirrored for bottom layer

Hä??

I am explaining why it is better to not mirror anything at all, and you

answer that's a good reason for mirroring the bottom layer... Does that

make any sense?

Tilmann