TECHNET Archives

January 2000

TechNet@IPC.ORG
Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
Re: gerber origin
From:
Kenneth Stephens <[log in to unmask]>
Reply To:
[log in to unmask]
Date:
Fri, 7 Jan 2000 11:20:47 -0800
Content-Type:
text/plain
Parts/Attachments:
text/plain (120 lines) 
What everyone is not saying is that the origin location should be near/on
the circuit boards and be located the same coordinates for each layer,
fixture, and mechanical drawing.  This makes checking registration between
layers much easier.  Any additional manipulation you require your
manufacturer to do introduces possible errors.

Ken Stephens, President
CAD 2 CAM, Inc.
http://www.cad2cam.com
503-246-4692

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Rick Thompson
> Sent: Friday, January 07, 2000 10:54 AM
> To: [log in to unmask]
> Subject: Re: [TN] gerber origin
>
>
> Steve,
>
> You must believe in the tooth fairy too! <g>
>
> Seriously, I think where 0,0 is from an assembly standpoint
> depends alot on
> your processing software and the equipment your using.  We
> generally set it
> at one of our fiducials.  Probably depends on the software, but
> ours allows
> moving it easily.
>
> Rick
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Stephen R. Gregory
> Sent: Friday, January 07, 2000 10:34 AM
> To: [log in to unmask]
> Subject: Re: [TN] gerber origin
>
>
> In a message dated 01/07/2000 12:13:03 PM Central Standard Time,
> [log in to unmask] writes:
>
> << or we move it to the lower left corner of the board or the panel. This
> makes locating the image on the metal sheet in the laser system just a
> little
> easier.
>
>  So, no rule, just a guideline.
>
>  Regards, Ahne Oosterhof,
>  A-Laser, Inc
>  (503)641-9428 >>
>
> Hi Donna!
>
> I'd like to echo Ahne's guidelines too...from an assemblers perspective.
> Sometimes, if we ask real nice, we'll get a file of the X/Y centroids for
> the
> SMT components in with the Gerbers, and it makes things real easy to
> generate
> the pick and place program if zero-zero is at either the lower
> left or lower
> right of the board. If we get real lucky, all the theta rotations in the
> X/Y
> file for the parts will match our machines too...and if we get
> REALLY lucky,
> each X/Y will have the part number, reference designator, and package type
> too! But I know sometimes that's asking a lot...hehehe.
>
> -Steve Gregory-
>
> ##############################################################
> TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
> ##############################################################
> To subscribe/unsubscribe, send a message to [log in to unmask] with
> following
> text in
> the body:
> To subscribe:   SUBSCRIBE TECHNET <your full name>
> To unsubscribe:   SIGNOFF TECHNET
> ##############################################################
> Please visit IPC web site (http://www.ipc.org/html/forum.htm) for
> additional
> information.
> If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
> 847-509-9700 ext.5365
> ##############################################################
>
> ##############################################################
> TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
> ##############################################################
> To subscribe/unsubscribe, send a message to [log in to unmask] with
> following text in
> the body:
> To subscribe:   SUBSCRIBE TECHNET <your full name>
> To unsubscribe:   SIGNOFF TECHNET
> ##############################################################
> Please visit IPC web site (http://www.ipc.org/html/forum.htm) for
> additional
> information.
> If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
> 847-509-9700 ext.5365
> ##############################################################
>

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################

ATOM RSS1 RSS2