[PCB_FORUM] Re: Schematic drafting practices

From: FrankW <fworm@xxxxxxxxx>
To: icu-pcb-forum@xxxxxxxxxxxxx
Date: Mon, 30 Mar 2009 13:39:34 -0400

Sorry Tim I don't really mean to be offensive
But Right now I'm dealing with a schematic

which is really really hard to read. I'm tired of it I tellya....so......tired

In reality I think I will request the particular eng to just  submit

pencil drawings and I'll do it for him...it's better thatway.....so....better

:-(
pardon me but I'm trying to keep my sanity

Is it Friday yet?


Tim DiJacklin wrote:

Please take this offline .......................

-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx]On Behalf Of FrankW
Sent: Monday, March 30, 2009 1:25 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Schematic drafting practices

Hi Bill
No offense but.....
Being on-line and using CAD to produce PDF documents

does not mean one has license produce "incomplete", crappy, difficult tofricken

read schematics!  It's supposed to be better not worse....... sheeze

The Schematic drawing doesn't belong to the Eng, They belong to the company
and anyone else who has to interpret or read it.

Funny how the Eng;s are getting away with this. If it was me producingpoorly

drawn documents, I'd be out of a job years ago.

Try to submit incomplete,crappy drawings to the medical and military.
Go ahead try it,  I dare ya!  In jest of coarse  :-)



Bill Dempsey wrote:

I would like to hear from those who have done this more recently than the
last 5 years. Technology is changing! Everyone is online now.
I have *not* seen service guys hunting p/g pins since before 2000!  It's NOT
been an issue for us and our designs are in use world-wide.
Time to change philosophy?

-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Austin Franklin
Sent: Monday, March 30, 2009 12:30 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Schematic drafting practices

Hi Alan,

Exactly!  I've also been in field service, and yes, that information is
critical, whether in a printed manual, or in PDF.  It also points out uses
for the schematics other than simply generating a netlist.  And that this
use may not entail the native tool used to draw the schematics.  Making the
schematics more useful for all the intended (and sometimes unintended)
purposes is very important, IMO.

Regards,

Austin

-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx]On Behalf Of Ritter, Alan
Sent: Monday, March 30, 2009 11:17 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Schematic drafting practices

Just out of curiosity, what about field service guys who may not
have ready access to online (on-disc) .pdf files?  Having all
information available in the schematic as either a table or
explicit pinouts seems critical for field service activities.

(Grated, my viewpoint is from that of a medical capital equipment
manufacturer with a field service force, not a manufacturer of
consumer goods that are throwaways and never "fixed" in the normal sense.)

/s/jar (Alan Ritter, alan.ritter@xxxxxxxxxx)
        http://www.mtritter.org

Just a few comments from my side of the world. I have to use my own
schematics in the lab as I am the EE who is forced to use his own work
(schematics, layouts, silkscreen!!, documentation).  I *never* use the
power/ground table nor do I use the individual pinned out symbols
-- in the
case where the symbol is huge (FPGA, processor).  I use PDF!  I hotlink
everything in the lab to PDF now and have monitors around where
online data
(local, www) is at your fingertips.  When using OrCAD, the P/G for large
symbols is placed as its own part with individual pins.  In Concept, the
hidden P/G through size is used with and without the table. Tables are no
longer generated as we find they are a waste of time. For small analog
parts, the VCC/GND pins are individually instantiated.

Over the last 25 yrs I have seen schematics change from draftsman-drawn
blueprints to modern CAD schematics.  I know what *hands-on* guys
are using
in the lab.  I've managed labs. I've debugged.  I've layed out.
I've built
symbols.  Power and Ground needs to be your company philosophy --
but don't
force something on someone until YOU'VE used your own documentation RULES
and learned the pros and cons of the rules.

BD

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