I think that we all need to get a grip on our job title envy. If all one is his/her job title then that person is in a heap of trouble, especially in today's job market.
I was a GI for 23 years. Does anyone know what that means? "Government Issue" That didn't change who I was/am. Nor did it affect how I felt about myself. I am me because of who I am, not what I am. There was a period that some of the female spouses took exception to being called "dependents". They didn't feel that they were dependent. (Of course they had no problems availing themselves of the services offered on which the depended.) MOO (My Opinion Only) Stephen Phillips <stephen%[email protected]> on 03/07/2002 03:27:10 PM Please respond to Stephen Phillips <stephen%[email protected]> To: "Robert Wilson" <robert_wilson%[email protected]> cc: emc-pstc%[email protected] (bcc: Oscar Overton/Lex/Lexmark) Subject: RE: EMC and Safety PCB Reviews Technically, we refer to them as PCB CAD engineers. I omitted part of that, given the fact that it seemed redundant - PCB's being the topic of discussion. I now return you back to your job as Keyboard Engineer. Stephen At 11:59 AM 3/7/2002, Robert Wilson wrote: >As a side issue to your comments, I find it interesting that you refer to >a PCB designer as a CAD engineer . Does this mean that 20 years ago he >would have been a Drafting Board engineer ? :) > > > >Kind of sad when the tool one uses is deemed to be more important than the >job one is doing! > >Bob Wilson >TIR Systems Ltd. >Vancouver. > >-----Original Message----- >From: Stephen Phillips [mailto:[email protected]] >Sent: March 6, 2002 9:49 AM >To: Alex McNeil >Cc: [email protected] >Subject: Re: EMC and Safety PCB Reviews > > > > Alex, > > Not really a thorough checklist per se, but for Safety - >roughly this: > > Throughout this process, I prefer to make notes on >paper doc's, and then sit with the CAD engineer to go >over the review on his computer screen and make any >changes right then. > > - Schematic review (identify and mark up areas such as > exceeding SELV and TNV, identify critical nets). > > - Provide Creepage & Clearance guidelines to PCB CAD > engineer (who inputs into the CAD system, based on > properties assigned to the nets via the schematic). > > - Placement Review (using marked up silk-screen or > assy. dwg based on previously marked up schematics), > and also layer stack-up review at this time. > > - Layout review, layer by layer routing, and adjacent layer > to layer. > > - Layout review with mechanical dwg superimposed > (since sheet metal could violate C&C to the PCB). > > - Thieving review (since thieving could violate C&C). > > - Photo Artwork review (especially planes). > > - Also make sure the drawings tell the PCB fab. vendor > not to put their logo smack in that nice clearing which > is your C&C! > > Obviously I left out a lot of the detail as to what we >design for and what we specifically look for, but these >are the higher granularity steps I routinely take. EMC >would take more or less the same steps, just with >different criteria. > > I hope this helps, > Stephen > > >At 09:46 AM 3/6/2002, you wrote: > > >Hi Guys, > >I am being asked to review PCB's for EMC (and Safety) acceptance. I was >going to try and collate a check list then I thought of this wonderful >forum!! > >Does any kind person have such a thing as an EMC PCB Design Check list? >Does any kind person have such a thing as an Safety PCB Design Check list? > >Kind Regards >Alex McNeil >Principal Engineer >Tel: +44 (0)131 479 8375 >Fax: +44 (0)131 479 8321 >email: [email protected] > > (See attached file: att1.htm)Technically, we refer to them as PCB CAD engineers.
I omitted part of that, given the fact that it seemed redundant -
PCB's being the topic of discussion. I now return you back
to your job as Keyboard Engineer.
Stephen
At 11:59 AM 3/7/2002, Robert Wilson wrote:
As a side issue to your comments, I find it interesting that you refer to a PCB designer as a CAD engineer . Does this mean that 20 years ago he would have been a Drafting Board engineer ? :)
Kind of sad when the tool one uses is deemed to be more important than the job one is doing!
Bob Wilson
TIR Systems Ltd.
Vancouver.
-----Original Message-----
From: Stephen Phillips [mailto:[email protected]]
Sent: March 6, 2002 9:49 AM
To: Alex McNeil
Cc: [email protected]
Subject: Re: EMC and Safety PCB Reviews
Alex,
Not really a thorough checklist per se, but for Safety -
roughly this:
Throughout this process, I prefer to make notes on
paper doc's, and then sit with the CAD engineer to go
over the review on his computer screen and make any
changes right then.
- Schematic review (identify and mark up areas such as
exceeding SELV and TNV, identify critical nets).
- Provide Creepage & Clearance guidelines to PCB CAD
engineer (who inputs into the CAD system, based on
properties assigned to the nets via the schematic).
- Placement Review (using marked up silk-screen or
assy. dwg based on previously marked up schematics),
and also layer stack-up review at this time.
- Layout review, layer by layer routing, and adjacent layer
to layer.
- Layout review with mechanical dwg superimposed
(since sheet metal could violate C&C to the PCB).
- Thieving review (since thieving could violate C&C).
- Photo Artwork review (especially planes).
- Also make sure the drawings tell the PCB fab. vendor
not to put their logo smack in that nice clearing which
is your C&C!
Obviously I left out a lot of the detail as to what we
design for and what we specifically look for, but these
are the higher granularity steps I routinely take. EMC
would take more or less the same steps, just with
different criteria.
I hope this helps,
Stephen
At 09:46 AM 3/6/2002, you wrote:
Hi Guys,
I am being asked to review PCB's for EMC (and Safety) acceptance. I was
going to try and collate a check list then I thought of this wonderful
forum!!
Does any kind person have such a thing as an EMC PCB Design Check list?
Does any kind person have such a thing as an Safety PCB Design Check list?
Kind Regards
Alex McNeil
Principal Engineer
Tel: +44 (0)131 479 8375
Fax: +44 (0)131 479 8321
email: [email protected]
