[PCB_FORUM] Re: Component disappearing from board while impor ting logic

Other things to think about.
 
At the schematic level (Concept?) are they assigning a hard location to the
component?
If they are just placing a component on the schematic without adding a
location property
then the packager will assign a ref des, this would cause the footprints to
go into the unplaced bin.
 
Also in the past I have seen engineers mistype the location property only
using LOC=R1....etc, this
would force the packager to assign a ref des. Have the engineer doing the
schematic back annotate
his schematic, then go in and check the components that he changed to see if
there is a ref des
assigned.
 
This process has worked just fine for many, many years.....most likely not a
bug, generally something
really small that is tough to find.
 
Good Luck,
 
Mike Gnieski
EMC Corp.
 
 
 

  _____  

From: Budathoki, Trilok (GE Consumer & Industrial)
[mailto:trilok.budathoki@xxxxxx] 
Sent: Tuesday, March 22, 2005 6:38 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Component disappearing from board while importing
logic


 
Thanks Everyone for participating in discussion.
We had changed only few components in schematic, other components weren't
changed & the Ref des was same....
Anyway we took the earlier day's file & back annotated to get it fixed.....
it's unstructured solution....gotta find why it happened or it's a bug.
 
FYI, the latest ISR has fixed the bug in export of IPC.
 
Good day to you all
 
Trilok Budathoki
G.E - India Business center
Email: trilok.budathoki@xxxxxx <mailto:trilok.budathoki@xxxxxx> 

-----Original Message-----
From: Austin Franklin [mailto:austin@xxxxxxxxxxxx]
Sent: Monday, March 21, 2005 10:00 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Component disappearing from board while importing
logic


Thanks Matt, I'm not sure what exactly caused the issue.  It wasn't missing
device/padstack etc. as the parts were in place/manually, and I had no
problem placing them manually.
 
Have you guys moved up to 15.2 yet?
 
Regards,
 
Austin

-----Original Message-----
From: Matt Dunn [mailto:mdunn@xxxxxxxxxxxxxx]
Sent: Monday, March 21, 2005 10:41 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Component disappearing from board while importing
logic


Hi Austin 

It should place the revised symbol even if it creates a drc. 
The only things we've run into that will cause it not to place are: 


No device file, but then the netlist won't read in either. 
No Symbol in the board or library. 
A padstack used by the new symbol that is not in the board or available in
the library. 


Austin Franklin wrote: 


 Hi Matt,I had tried those options.  It may be, in my case, that if the
footprint was changed in physical size, say, from an 0402 to an 0603 and the
new footprint would create a DRC error and it won't place it.  If DRC is
why, then I could turn DRC off and see.Regards,Austin 

-----Original Message----- 
From: Matt Dunn [mailto:mdunn@xxxxxxxxxxxxxx <mailto:mdunn@xxxxxxxxxxxxxx> ]

Sent: Monday, March 21, 2005 9:40 AM 
To: icu-pcb-forum@xxxxxxxxxxxxx 
Subject: [PCB_FORUM] Re: Component disappearing from board while importing
logic 
 
Under inport logic, ther is an option block for what to do with changed
components. 
Pick always and changed components will be placed where they were, unless
the symbol or a padstack is not available. 
  
  

Austin Franklin wrote: 


Hi Trilok,When you say you changed JEDAC, do you mean the physical symbol
(PCB footprint)?  If so, then it will do just as you say in my experience.
It only keeps placement of components that are the same physical symbol (and
REFDES).  Unless there is an option somewhere that prevents it from doing
that, it's the way it works.The way to avoid this, possibly, is to change
the footprint manually by using "Logic/Part Logic" and changing the "Allegro
Packages" for the parts you want to change.Regards,Austin 

-----Original Message----- 
From: Budathoki, Trilok (GE Consumer & Industrial)
[mailto:trilok.budathoki@xxxxxx <mailto:trilok.budathoki@xxxxxx> ] 
Sent: Monday, March 21, 2005 1:47 AM 
To: icu-pcb-forum@xxxxxxxxxxxxx 
Subject: [PCB_FORUM] Component disappearing from board while importing logic
Hi Everyone,Here's a  problem while importing Logic in allegro. Board is
completely routed & I am re-importing logic with minor changes, Some of the
components are disappearing from board & appears on the Menu --> Place
-->Manual --> Components by ref des.We have changed JEDAC only for changed
components. In Import logic, I have tried all possible options. This problem
is both in Allegro Designer & Expert. We use  version 15.2 Has anyone faced
similar problem & got any remedy.Thanks in advance.Trilok Budathoki 
GE - India Business Center 
*: 91-40-27881731(Direct) 
* : trilok.budathoki@xxxxxx 
 

-- 
Matt Dunn 
Director of Design Operations 
Applied CAD Knowledge, Inc. 
matt@xxxxxxxxxxxxxx  978-649-9800 
 

-- 
Matt Dunn 
Director of Design Operations 
Applied CAD Knowledge, Inc. 
matt@xxxxxxxxxxxxxx  978-649-9800

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