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Aligning parts on a metric grid

autodeskguest

Hi,

 

I've created a component in library editor. I used a 2.50 mm grid, since

this is the pitch of the pins on the part. The pads for the part in the

package design are therefore perfectly aligned on this metric grid.

 

I've now used this part on a schematic, and am trying to create a board .

All the parts on the board are these same 2.50 mm pitch parts, all created

by me in library editor.

 

On the board, i'm changing grid to 2.50mm, same as the parts. But, the

centres of the pads are not aligned with the grid on the board - they are

what seems to be an arbitrary offset.

 

How can I resolve this? My traces will be very messy unless the pads line up

with the grid.

 

Thanks

 

Jon

 

 

 

  • one issue may be that the grid on the board is too coarse. for sure the

    routing grid needs to be 1/5 or 1/10 the pin spacing for most routing

    situations. but this is not the same as the placement grid. i use the

    default placement grid, but i use the Alt key a lot to make final

    placements, thus a a very fine place grid. i don't worry about how the

    traces will snap to the pads, it always seems to work. the problem is

    jamming all the components onto the board in an efficient layout.

     

    another issue may be that all the package centers in the libraries are

    off the package's 2.5mm grid. though i can't see how this would happen.

     

    just 2 guesses, i never had this problem.

     

  • "Jon" <slippyr4@gmail.com> wrote in message

    news:gqtje8$jfh$1@cheetah.cadsoft.de...

    Hi,

     

    I've created a component in library editor. I used a 2.50 mm grid, since

    this is the pitch of the pins on the part. The pads for the part in the

    package design are therefore perfectly aligned on this metric grid.

     

    I've now used this part on a schematic, and am trying to create a board .

    All the parts on the board are these same 2.50 mm pitch parts, all created

    by me in library editor.

     

    On the board, i'm changing grid to 2.50mm, same as the parts. But, the

    centres of the pads are not aligned with the grid on the board - they are

    what seems to be an arbitrary offset.

     

    How can I resolve this? My traces will be very messy unless the pads line

    up with the grid.

     

     

    You can avoid this by pressing Ctrl while placing (moving) the component

    (the component will jump into the current grid).

     

    Walter