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'[EE]: Gerber file clearance check'
2004\11\24@150559 by James Nick Sears

picon face
I have ordered a couple of boards in the past couple of weeks that I
designed using Eagle.  Unfortunately both orders have been delayed by a
clearance less than the specification.  The DRC in Eagle gives me
hundreds of meaningless clearance errors from pads that I have
overlapped to create the pad size that I need.  I just had the thought
that I could create my own pads without this problem with a copper
polygon and a Stop polygon to block the soldermask.  However, I would
still like to be able to directly check the output files before I submit
them.  Is there a (preferably free or at least cheap) program that can
take Gerber files and check the clearances of pads and traces that are
not in contact?

Thanks,
Nick


____________________________________________

2004\11\24@152300 by Mike Hord

picon face
> I have ordered a couple of boards in the past couple of weeks that I
> designed using Eagle.  Unfortunately both orders have been delayed by a
> clearance less than the specification.  The DRC in Eagle gives me
> hundreds of meaningless clearance errors from pads that I have
> overlapped to create the pad size that I need.  I just had the thought
> that I could create my own pads without this problem with a copper
> polygon and a Stop polygon to block the soldermask.  However, I would
> still like to be able to directly check the output files before I submit
> them.  Is there a (preferably free or at least cheap) program that can
> take Gerber files and check the clearances of pads and traces that are
> not in contact?
>
> Thanks,
> Nick

Have a look at GraphiCode.  The preview version is free and (IIRC) allows
you to open Gerber plots and check them out.

Mike H.
____________________________________________

2004\11\25@031959 by Wouter van Ooijen

face picon face
> > them.  Is there a (preferably free or at least cheap)
> program that can
> > take Gerber files and check the clearances of pads and
> traces that are
> > not in contact?

GerbView and ViewMate are free and can view gerber files. But how could
they decide whether touching/overlapping copper is intentional or not?

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: http://www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: http://www.voti.nl/hvu


____________________________________________

2004\11\26@012104 by James Nick Sears

picon face
>GerbView and ViewMate are free and can view gerber files. But how could
>they decide whether touching/overlapping copper is intentional or not?
>
>Wouter van Ooijen



I'd be happy if a program would just find spacings greater than zero and
less than the minimum spec.  I am not expecting it to find touching or
overlapped traces, but would just like to know if two copper areas that
are not touching are too close together.

Nick


____________________________________________

2004\11\26@145408 by Bob Barr

flavicon
face
There's a free on-line Gerber check available at the http://www.FreeDFM.com
site. It's run by a PCB fab house whose name I've forgotten
(4pcb.com?).

You do need to register to use the service but the way it works is
that you upload your Gerbers in a zip file and they email you back an
error report and a quote for producing the board.

I don't know how it would handle multiple pads deliberately overlapped
but it might be worth it giving them a shot.

Regards, Bob


On Wed, 24 Nov 2004 14:09:40 -0600, "James Nick Sears" wrote:

{Quote hidden}

____________________________________________

2004\11\28@043030 by James Nick Sears

picon face
Thanks for the info.  I'll give it a try next time.

Nick


-----Original Message-----
From: spam_OUTpiclist-bouncesTakeThisOuTspammit.edu [.....piclist-bouncesKILLspamspam@spam@mit.edu] On Behalf
Of Bob Barr
Sent: Friday, November 26, 2004 1:54 PM
To: Microcontroller discussion list - Public.
Subject: Re: [EE]: Gerber file clearance check

There's a free on-line Gerber check available at the http://www.FreeDFM.com
site. It's run by a PCB fab house whose name I've forgotten
(4pcb.com?).

You do need to register to use the service but the way it works is
that you upload your Gerbers in a zip file and they email you back an
error report and a quote for producing the board.

I don't know how it would handle multiple pads deliberately overlapped
but it might be worth it giving them a shot.

Regards, Bob


On Wed, 24 Nov 2004 14:09:40 -0600, "James Nick Sears" wrote:

>I have ordered a couple of boards in the past couple of weeks that I
>designed using Eagle.  Unfortunately both orders have been delayed by a
>clearance less than the specification.  The DRC in Eagle gives me
>hundreds of meaningless clearance errors from pads that I have
>overlapped to create the pad size that I need.  I just had the thought
>that I could create my own pads without this problem with a copper
>polygon and a Stop polygon to block the soldermask.  However, I would
>still like to be able to directly check the output files before I
submit
>them.  Is there a (preferably free or at least cheap) program that can
>take Gerber files and check the clearances of pads and traces that are
>not in contact?
>
____________________________________________

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