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Date: Sun, 25 May 2014 07:20:18 +0800
Message-ID: <CAJKct7jeO0ccYCEp3QWgJvhW=JvJowRpWTJt26PFqzLLnfpzXg@mail.gmail.com>
Subject: Re: [geda-user] Pcb MoveObject() don't set exactly position?
From: =?UTF-8?B?6IuP5LuB5LmJ?= <kernelml AT gmail DOT com>
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I use the flowing steps to add a via, but some behavior I don't understand:
1. enable ``Crosshair snaps to pins and pads'' under ``Settings'' menu, and
set grid size to 0.01mm under ``View'' menu.  also use unit  ``mm''.
2. Add a via to PCB canvas,PCB show it's coordinate is 56.3100 72.8500 on
up right corner.
3. :MoveObject(55.0000, 72.0000, mm) to position the via, then CRTL+R pcb
show it's coordinate is 54.9839 72.0073.
4 :MoveObject(55.0000, 72.0000, mm) again, but CTRL+R show it's coordinate
is 55.0002 72.0108.
Step 3, 4 the same action, the same parameters, but the result is
different. I want to know how PCB work with position via?
I need this footprint : www.kosmodrom.com.ua/pdf/*HR911105A*.pdf. Any tool
may I use to make the footprint?

Thanks for your help!

With kind regards.




2014-05-24 2:38 GMT+08:00 DJ Delorie <dj AT delorie DOT com>:

>
> The key to using vias to make footprints is to make sure you have a
> suitable grid.  You either have grid snap turned on, in which case you
> need the grid to be right, or it's off and you'll never position it
> where you want.
>
> Alternately, use one of the many scripting languages or footprint
> tools to build it parametrically, if it's that kind of footprint.
>

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<div dir=3D"ltr">I use the flowing steps to add a via, but some behavior I =
don&#39;t understand:<div>1. enable ``Crosshair snaps to pins and pads&#39;=
&#39; under ``Settings&#39;&#39; menu, and set grid size to 0.01mm under ``=
View&#39;&#39; menu. =C2=A0also use unit =C2=A0``mm&#39;&#39;.</div>
<div>2. Add a via to PCB canvas,PCB show it&#39;s coordinate is 56.3100 72.=
8500 on up right corner.</div><div>3. :MoveObject(55.0000, 72.0000, mm) to =
position the via, then CRTL+R pcb show it&#39;s coordinate is 54.9839 72.00=
73.</div>
<div>4 :MoveObject(55.0000, 72.0000, mm) again, but CTRL+R show it&#39;s co=
ordinate is 55.0002 72.0108.</div><div>Step 3, 4 the same action, the same =
parameters, but the result is different. I want to know how PCB work with p=
osition via?</div>
<div>I need this footprint :=C2=A0<span style=3D"font-size:13px;color:rgb(4=
,98,43);font-family:arial,sans-serif;line-height:16px;white-space:nowrap"><=
a href=3D"http://www.kosmodrom.com.ua/pdf/">www.kosmodrom.com.ua/pdf/</a></=
span><b style=3D"font-size:13px;color:rgb(4,98,43);font-family:arial,sans-s=
erif;line-height:16px;white-space:nowrap">HR911105A</b><span style=3D"font-=
size:13px;color:rgb(4,98,43);font-family:arial,sans-serif;line-height:16px;=
white-space:nowrap">.pdf.</span>=C2=A0Any tool may I use to make the footpr=
int?</div>
<div><br></div><div>Thanks for your help!</div><div><br></div><div>With kin=
d regards.</div><div><br></div><div><br></div></div><div class=3D"gmail_ext=
ra"><br><br><div class=3D"gmail_quote">2014-05-24 2:38 GMT+08:00 DJ Delorie=
 <span dir=3D"ltr">&lt;<a href=3D"mailto:dj AT delorie DOT com" target=3D"_blank">=
dj AT delorie DOT com</a>&gt;</span>:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><br>
The key to using vias to make footprints is to make sure you have a<br>
suitable grid. =C2=A0You either have grid snap turned on, in which case you=
<br>
need the grid to be right, or it&#39;s off and you&#39;ll never position it=
<br>
where you want.<br>
<br>
Alternately, use one of the many scripting languages or footprint<br>
tools to build it parametrically, if it&#39;s that kind of footprint.<br>
</blockquote></div><br></div>

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