Hi,
I disagree, showing the DNI makes it much easier for the inspection of
missing parts. Is a part location without a part a missing part or a DNI?
Bob Kondner
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ioan Tempea
Sent: Tuesday, December 08, 2009 11:04 AM
To: [log in to unmask]
Subject: Re: [TN] PCB parts that are not installed
The best method Shawn is the components that will not be populated do not
show in the BOM. Why should they be there, as they will require removal at
the assembly level anyways?
Ioan Tempea, ing.
Ingénieur Principal de Fabrication / Senior Manufacturing Engineer
T | 450.967.7100 ext.244
E | [log in to unmask]
W | www.digico.cc
N’imprimer que si nécessaire – Print only if you must
-----Message d'origine-----
De : John Goulet [mailto:[log in to unmask]]
Envoyé : Tuesday, December 08, 2009 10:59 AM
À : [log in to unmask]
Objet : Re: [TN] PCB parts that are not installed
DNI is used normally used for the specific assembly process.
An SMT part may need to be installed after SMT for clearance of selective
solder height reasons.
The kitting department needs to know which kit to put the part: SMT,
pre-wave, post wave, mechanical or test.
If the customer has the part on the BOM then it has to be purchased and
kitted but in the correct kit.
Occasionally there may be a manufacturing deviation to send a part with the
board separately when there was a design or part spec problem on the
prototype.
Hope this helps.
J. Goulet Sr. Process Engineer
----- Original Message -----
From: "Shawn Upton" <[log in to unmask]>
To: [log in to unmask]
Sent: Tuesday, December 8, 2009 10:36:16 AM GMT -05:00 US/Canada Eastern
Subject: [TN] PCB parts that are not installed
Quick question: What is the best method of specifying parts that are not
installed on a PCB assembly? I've used "DNI" for a while, while others
have used "TBD" or "DNK" (for Do Not Kit). "TBD" was used for locations
which would be stuffed after some testing--maybe 1.01k had to be used on
this assembly, 1.05k on another, etc.
What is typical method on this? For parts that are intentionally not
installed, and parts that may be installed at a later date.
Also, just to verify: is it generally desirably to list all parts that
are not installed on a board? I usually list all parts, installed or
not, and the parts not installed are specifically listed as "Do Not
Install", so as to make it clear that they are DNI'd.
Shawn Upton, KB1CKT
Test Engineer
Allegro MicroSystems, Inc
[log in to unmask]
603.626.2429/fax: 603.641.5336
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