kicad-developers team mailing list archive

[jean-pierre charras <jp.charras@xxxxxxxxxx>]

Le 20/08/2012 20:28, Lorenzo Marcantonio a écrit :
> Is there a reason for eeschema to only have imperial grids? (probably
> because internally works in mils?)
>
> There are people which would like to work in metric in eeschema, too
> (with custom libs, obviously)
Lorenzo,

For a schematic tool, the grid size has not really a meaning.
It just define roughly the size of graphic elements for printing (like a zoom factor).

One can consider a 2.54 mm (0.1 inch) grid size is the same as 2.5 mm metric grid.
the 1% size error has no meaning for a schematic.

The next Eeschema generation (I hope) will know only a grid that define the position of pins
(and items that can be connected: labels, wires ... )
The actual size (in mm, inch or parsec if you prefer) will be an user choice that define
the size of items when printing ( a zoom factor if you prefer )

The "standard" grid pin size is currently 50 mils or 1.27 mm.
( users who want metric units can read 1.25 mm, the pitch of a 10mm screw, in ISO metric units ).

The actual size when printed depends on paper size, margins...

A schematic is not a PCB.

--
Jean-Pierre CHARRAS