layer setup and settings

On 10/27/2010 6:58 AM, E wrote:

Hi all,

I am sorry to be a noob in this, anyone can help me in writing layer setup

properly (and in some other issues)

1. Schematic has 2 classes: default and power. I would like to router 4

layer board, with top and bottom to be signal layers, and 2nd and 15th to be

power levels (GND and +5v respectively). What should I write in DRC layers

setup?

2. How to make power and gnd layers to span through whole PCB layer (and not

to just connect vias, pins and pads).

3. Board has holes for mounting in the chassis, and those holes should

connect to gnd layer. How to do that - I can not define holes with their

pads in schematics, but if I define them on the board view pads disappear

when I perform "ripup".

Thank you for helping me.

 

>

Hi E,

I hope you are doing well. See answers below:

1.You don't write anything in the DRC settings to define your inner

layers as power layers. There are two ways to do this.

First, you can simply use a polygon that encompasses all of the board

area, give the polygon the same name as the net you want connected to

it(GND for example).

The second method is to turn the internal layers into supply layers. To

do this use the display command to view your layers. Select one of the

internal layers, then click the change button at the bottom of the

window. This will open up the properties of the layer, you'll see a

check box that says supply layer make sure it's checked. Say ok until

you return to the display window. You'll now notice that a $ sign has

been appended to the layer name this is how EAGLE distinguishes a supply

layer.

A few tips about supply layers, only use them if you want a clean plane

with only vias connecting to it, if you need to route traces then use

the polygon method. The reason for this is that supply layers are

reverse layers, what this means is that anything you draw on a supply

layer is considered removed copper so if you draw traces, then when your

board is made the traces will be removed which is not what you

wanted.The autorouter works better with supply layers than it does with

polygons so that may be something to consider.

2. See Answer 1

3. Use parts from the holes.lbr these are already setup for this purpose.

hth,

Jorge Garcia

Jorge, thank you so much.

Can you please tell me how to make polygons solid filled with layer color? I

am routing power and would like to use poly's for drawing tracks of various

wide (between the lines of other signals). But poly shows dotted contour...

"Jorge Garcia" <jorge@cadsoftusa.com> wrote in message

news:ia9p9o$qbg$1@cheetah.cadsoft.de...

On 10/27/2010 6:58 AM, E wrote:

>> Hi all,

>> I am sorry to be a noob in this, anyone can help me in writing layer

>> setup

>> properly (and in some other issues)

>> 1. Schematic has 2 classes: default and power. I would like to router 4

>> layer board, with top and bottom to be signal layers, and 2nd and 15th to

>> be

>> power levels (GND and +5v respectively). What should I write in DRC

>> layers

>> setup?

>> 2. How to make power and gnd layers to span through whole PCB layer (and

>> not

>> to just connect vias, pins and pads).

>> 3. Board has holes for mounting in the chassis, and those holes should

>> connect to gnd layer. How to do that - I can not define holes with their

>> pads in schematics, but if I define them on the board view pads disappear

>> when I perform "ripup".

>> Thank you for helping me.

>>

>>

>

Hi E,

 

I hope you are doing well. See answers below:

 

1.You don't write anything in the DRC settings to define your inner layers

as power layers. There are two ways to do this.

First, you can simply use a polygon that encompasses all of the board

area, give the polygon the same name as the net you want connected to

it(GND for example).

The second method is to turn the internal layers into supply layers. To do

this use the display command to view your layers. Select one of the

internal layers, then click the change button at the bottom of the window.

This will open up the properties of the layer, you'll see a check box that

says supply layer make sure it's checked. Say ok until you return to the

display window. You'll now notice that a $ sign has been appended to the

layer name this is how EAGLE distinguishes a supply layer.

 

A few tips about supply layers, only use them if you want a clean plane

with only vias connecting to it, if you need to route traces then use the

polygon method. The reason for this is that supply layers are reverse

layers, what this means is that anything you draw on a supply layer is

considered removed copper so if you draw traces, then when your board is

made the traces will be removed which is not what you wanted.The

autorouter works better with supply layers than it does with polygons so

that may be something to consider.

 

2. See Answer 1

 

3. Use parts from the holes.lbr these are already setup for this purpose.

 

hth,

Jorge Garcia

Help Ratsnest

r

That doesn't help.

Let me say again: I want to draw areas of copper manually which will be

automatically filled with specific color of the layer and assign these areas

respective signals (gnd, vcc etc)

"Ing. J.M. Rafetseder" <jrafetseder@hotmail.com> wrote in message

news:iab9ai$t5f$1@cheetah.cadsoft.de...

Help Ratsnest

r

"E" <msx.fan@mail.ru> wrote in message

news:iaboh6$jsr$1@cheetah.cadsoft.de...

That doesn't help.

Let me say again: I want to draw areas of copper manually which will be

automatically filled with specific color of the layer and assign these

areas respective signals (gnd, vcc etc)

What he means is that you have to run ratsnest before they get filled. It

does not happen automatically.

Also, there must be a signal to connect to within the poly. Try placing a

via in it, and rename the polygon and via to the same name, then press

ratsnest.

Morten, thank you. That helped, now I can continue my work

"Morten Leikvoll" <mleikvol@yahoo.nospam> wrote in message

news:iabon4$l70$1@cheetah.cadsoft.de...

"E" <msx.fan@mail.ru> wrote in message

news:iaboh6$jsr$1@cheetah.cadsoft.de...

>> That doesn't help.

>> Let me say again: I want to draw areas of copper manually which will be

>> automatically filled with specific color of the layer and assign these

>> areas respective signals (gnd, vcc etc)

 

What he means is that you have to run ratsnest before they get filled. It

does not happen automatically.

Also, there must be a signal to connect to within the poly. Try placing a

via in it, and rename the polygon and via to the same name, then press

ratsnest.

 

 

Another issue which I can not sort out.

I created a series of polygons on the layer 1 touching each other and having

name "gnd". All well and ratsnest seem to accept it. But when I run DRC

check it displays error "width" for layer 1 for one of the sides of each

polygon (seems the initial ones I was starting drawing them from). I tried

thin line width, I tried thick one with same error. What's wrong? I use

default DRC rettings.

"E" <msx.fan@mail.ru> wrote in message

news:iabqt5$vfj$1@cheetah.cadsoft.de...

Morten, thank you. That helped, now I can continue my work

 

"Morten Leikvoll" <mleikvol@yahoo.nospam> wrote in message

news:iabon4$l70$1@cheetah.cadsoft.de...

>> "E" <msx.fan@mail.ru> wrote in message

>> news:iaboh6$jsr$1@cheetah.cadsoft.de...

>>> That doesn't help.

>>> Let me say again: I want to draw areas of copper manually which will be

>>> automatically filled with specific color of the layer and assign these

>>> areas respective signals (gnd, vcc etc)

>>

>> What he means is that you have to run ratsnest before they get filled. It

>> does not happen automatically.

>> Also, there must be a signal to connect to within the poly. Try placing a

>> via in it, and rename the polygon and via to the same name, then press

>> ratsnest.

>>

>>

>

I found out a problem - it was in net class setup.

Well, issues did not end here.

I have 2 polygons, and want to have thermals for specific elements (e.g.

capacitors) but no thermals for passthrough vias (connecting top and bottom

layers' polygons). So far I did not find a way to achieve it - polygon

either has thermals or not, I can not define it at the specific via level,

right?

"E" <msx.fan@mail.ru> wrote in message

news:iabvmr$4oh$1@cheetah.cadsoft.de...

Another issue which I can not sort out.

I created a series of polygons on the layer 1 touching each other and

having name "gnd". All well and ratsnest seem to accept it. But when I run

DRC check it displays error "width" for layer 1 for one of the sides of

each polygon (seems the initial ones I was starting drawing them from). I

tried thin line width, I tried thick one with same error. What's wrong? I

use default DRC rettings.

 

"E" <msx.fan@mail.ru> wrote in message

news:iabqt5$vfj$1@cheetah.cadsoft.de...

>> Morten, thank you. That helped, now I can continue my work

>>

>> "Morten Leikvoll" <mleikvol@yahoo.nospam> wrote in message

>> news:iabon4$l70$1@cheetah.cadsoft.de...

>>> "E" <msx.fan@mail.ru> wrote in message

>>> news:iaboh6$jsr$1@cheetah.cadsoft.de...

>>>> That doesn't help.

>>>> Let me say again: I want to draw areas of copper manually which will be

>>>> automatically filled with specific color of the layer and assign these

>>>> areas respective signals (gnd, vcc etc)

>>>

>>> What he means is that you have to run ratsnest before they get filled.

>>> It does not happen automatically.

>>> Also, there must be a signal to connect to within the poly. Try placing

>>> a via in it, and rename the polygon and via to the same name, then press

>>> ratsnest.

>>>

>>>

>>

>>

>

"E" <msx.fan@mail.ru> wrote in message

news:iac2mm$kmr$1@cheetah.cadsoft.de...

I have 2 polygons, and want to have thermals for specific elements (e.g.

capacitors) but no thermals for passthrough vias (connecting top and

bottom layers' polygons). So far I did not find a way to achieve it -

polygon either has thermals or not, I can not define it at the specific

via level, right?

There is a DRC settings for thermal on via. See the supply tab.