OK to have brd dimension NOT to start at origin, that is, (0,0)?

On 5/23/2010 12:06 AM, AL wrote:

Hi,

 

I have dilemma. My brd design has to be 0.1 in. spacing, that is, 2.54mm

spacing. As you can see from the attached image, I can't have the board

dimension starts at the origin, the bottom left corner. The reason is

that the red wires just under the green via would nearly touch the

bottom edge of the board, thus, violation DRC rules. If I move the via

up the next 0.1 in., then there is no DRC rule violation, but I have a

big gap now. So, what I do now is moving origin, so that I won't have a

gap and still not having any DRC error.

 

As far as I know, that should be fine, correct? At the end of the day,

it's the board's dimensions, regardless of its origin, is what counts?

 

Thanks

Sorry to clarify...It's not a via I that I wrote previously.  It's one

of the holes of one of the header pins.

AL[1

wrote on Sun, 23 May 2010 01:06]Hi,

 

I have dilemma.  My brd design has to be 0.1 in. spacing, that is,

2.54mm spacing.  As you can see from the attached image, I can't have

the board dimension starts at the origin, the bottom left corner.  The

 

reason is that the red wires just under the green via would nearly

touch

the bottom edge of the board, thus, violation DRC rules. If I move the

 

via up the next 0.1 in., then there is no DRC rule violation, but I

have

a big gap now.  So, what I do now is moving origin, so that I won't

have

a gap and still not having any DRC error.

 

As far as I know, that should be fine, correct?  At the end of the day,

 

it's the board's dimensions, regardless of its origin, is what counts?

 

Thanks

 

--

You can make your board any reasonable size/shape you want and start it

anywhere you need to (assuming you have the Pro version). The relative

dinemsions between the components and pads will remain the same and on the

grid regardless where you put your board outline. You can shift your board

to allow for traces and to pass the DRC and it should be fine.

Putting a corner at the origin is more for convenience than anything else.

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

AL wrote:

Hi,

 

I have dilemma.  My brd design has to be 0.1 in. spacing, that is,

2.54mm spacing.  As you can see from the attached image, I can't have

the board dimension starts at the origin, the bottom left corner.  The

reason is that the red wires just under the green via would nearly touch

the bottom edge of the board, thus, violation DRC rules. If I move the

via up the next 0.1 in., then there is no DRC rule violation, but I have

a big gap now.  So, what I do now is moving origin, so that I won't have

a gap and still not having any DRC error.

 

As far as I know, that should be fine, correct?  At the end of the day,

it's the board's dimensions, regardless of its origin, is what counts?

 

Thanks

 

------------------------------------------------------------------------

 

Perhaps I am not understanding the problem.   Have you tried setting an

alternate grid? (See Help->Grid)  If you define an alt grid which is a

small fraction of the normal grid unit you can selectively use it to

adjust placement by very small amounts if needed ....just hold down the

alt key while moving a component/trace.

jiml

On 5/23/2010 9:17 AM, Jim Littlefield wrote:

AL wrote:

Hi,

 

I have dilemma. My brd design has to be 0.1 in. spacing, that is,

2.54mm spacing. As you can see from the attached image, I can't have

the board dimension starts at the origin, the bottom left corner. The

reason is that the red wires just under the green via would nearly

touch the bottom edge of the board, thus, violation DRC rules. If I

move the via up the next 0.1 in., then there is no DRC rule violation,

but I have a big gap now. So, what I do now is moving origin, so that

I won't have a gap and still not having any DRC error.

 

As far as I know, that should be fine, correct? At the end of the day,

it's the board's dimensions, regardless of its origin, is what counts?

 

Thanks

 

------------------------------------------------------------------------

 

 

Perhaps I am not understanding the problem. Have you tried setting an

alternate grid? (See Help->Grid) If you define an alt grid which is a

small fraction of the normal grid unit you can selectively use it to

adjust placement by very small amounts if needed ....just hold down the

alt key while moving a component/trace.

 

jiml@:  The pin headers have to be in 0.1 in. spacing, because they go

into the breadboard. Because of that, it has to be in 0.1 inch increments.

jiml

AL wrote:

On 5/23/2010 9:17 AM, Jim Littlefield wrote:

AL wrote:

Hi,

 

I have dilemma. My brd design has to be 0.1 in. spacing, that is,

2.54mm spacing. As you can see from the attached image, I can't have

the board dimension starts at the origin, the bottom left corner. The

reason is that the red wires just under the green via would nearly

touch the bottom edge of the board, thus, violation DRC rules. If I

move the via up the next 0.1 in., then there is no DRC rule violation,

but I have a big gap now. So, what I do now is moving origin, so that

I won't have a gap and still not having any DRC error.

 

As far as I know, that should be fine, correct? At the end of the day,

it's the board's dimensions, regardless of its origin, is what counts?

 

Thanks

 

------------------------------------------------------------------------

 

 

Perhaps I am not understanding the problem. Have you tried setting an

alternate grid? (See Help->Grid) If you define an alt grid which is a

small fraction of the normal grid unit you can selectively use it to

adjust placement by very small amounts if needed ....just hold down the

alt key while moving a component/trace.

 

 

jiml@:  The pin headers have to be in 0.1 in. spacing, because they go

into the breadboard. Because of that, it has to be in 0.1 inch increments.

 

jiml

The spacing between the pins in the header is controlled by the library

package definition.   You can move the entire connector on the alt grid

without affecting the pin spacing within a single connector.   If you

are trying to keep a 0.1 spacing between different headers you can still

do this by clicking the info button and manually assigning coordinates

which are an integer multiple of 0.1 inch units from the position of

another reference connector.    This will keep the headers on 0.1 grid

w/o having to keep them so wrt the PCB edge.

jiml

On 5/23/2010 12:42 PM, Jim Littlefield wrote:

 

jiml@: The pin headers have to be in 0.1 in. spacing, because they go

into the breadboard. Because of that, it has to be in 0.1 inch

increments.

 

jiml

 

The spacing between the pins in the header is controlled by the library

package definition.

Nope, not talking about the space between the pins.  That's 0.1 inch for

sure.  I am talking about entire header has to be at 0.1 inch increment

in order for the entire header to be plugged into the breadboard nicely.

  You can move the entire connector on the alt grid

without affecting the pin spacing within a single connector. If you are

trying to keep a 0.1 spacing between different headers you can still do

this by clicking the info button and manually assigning coordinates

which are an integer multiple of 0.1 inch units from the position of

another reference connector. This will keep the headers on 0.1 grid w/o

having to keep them so wrt the PCB edge.

 

jiml