X-Authentication-Warning:	delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient:	geda-user AT delorie DOT com
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=gmail.com; s=20120113;
	h=mime-version:in-reply-to:references:date:message-id:subject:from:to
	:content-type;
	bh=dPhLpKrwwVyWNh91o1kjXfgiUyz7nhsN0OFC/d0xKHc=;
	b=a134+XGlEiss5gdlpo5Woal6AaVNPjBDyth3T0mz8LUUkB8opF9qVH1B7CSL5iWYWB
	1uHj1zPpAoEbDXmfVjwv4nbO+0SpbhTOiR/MD3cWTGoaxsc7BUmSyNVJnBq14uMTI9Hd
	azehmkJ68y8TTzMUqPH+HLXLkSlSDPy7hcqvXf1l8hvd/p+eXIfq3w85F8i/6A+xJ/fT
	cZkqLUUWk3BqXZNIgscJvQftjEmi6aZ2s7zQhxGCUwUT+f7pGX3dXH5b9RlyFkjb7uo1
	Z7PsOO7qw7h+UfpySRZ1oyamaJlG9WZTBxqTbM8newfRYKIOyQpmHq9GgvcGIDK5lm1b
	yBRg==
MIME-Version:	1.0
In-Reply-To:	<4F9AB232.9030508@ecosensory.com>
References:	<4F915B7C DOT 9000009 AT schinagl DOT nl>
	<4F959E1F DOT 6010803 AT schinagl DOT nl>
	<4F997E2E DOT 7010306 AT schinagl DOT nl>
	<4F99CEFD DOT 10707 AT schinagl DOT nl>
	<jncl8u$ph5$1 AT dough DOT gmane DOT org>
	<20120426170536 DOT 73e21755 AT svelte>
	<4F9A6010 DOT 7010305 AT schinagl DOT nl>
	<20120427064154 DOT 44e9eb77 AT svelte>
	<4F9AB232 DOT 9030508 AT ecosensory DOT com>
Date:	Fri, 27 Apr 2012 21:18:48 -0400
Message-ID:	<CAPYb0EEN92RMfYAgnhf=FXGUFpZ0FwOrSFT7BzNWoyjAJ3vFDg@mail.gmail.com>
Subject:	Re: [geda-user] board fab
From:	Bob Paddock <bob DOT paddock AT gmail DOT com>
To:	geda-user AT delorie DOT com
Reply-To:	geda-user AT delorie DOT com
Errors-To:	nobody AT delorie DOT com
X-Mailing-List:	geda-user AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

> The boards are tab routed, so edges will have a
> rough spot where a tab is broken off.

If you can specify where the tabs are going (easy if your doing your
own panel layout, not so easy with a board service),
and you can make some space at the edge of the board where the tab is
located, you can get clean tabs:

Specify a series of very small drill holes, whatever the smallest
drill the service has, that are as close together as allowed.  The
drill hit is then centered
on what would be the edge of the board.  This puts half of the drill
hit into the board, and half of the drill hit into the tab.  These are
not plated holes,
which is a problem with some places.  If it is done correctly there is
no clean up work.

Caveat with any tab work: Study where the stress goes when the tab is broken.
Putting things like ceramic caps or crystals next to the tab will
result in fractured parts.
If it is a bypass cap the damage is not always immediately obvious.


-- 
http://blog.softwaresafety.net/
http://www.designer-iii.com/
http://www.wearablesmartsensors.com/

- Raw text -