May I correct you - all components used in RoHS compliant products must
be RoHS compliant.
I just wish people would stop using the term lead-free - we are
addressing RoHS compliance and Pb is just part of our concern.
Many component mfrs are at fault also, only talking about leadfree.
Parts have to be RoHS compliant and process compliant.
Regards,
Chris
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Blair K. Hogg
Sent: 08 February 2005 16:23
To: [log in to unmask]
Subject: Re: [LF] Putting new part numbers on RoHS components - was Re:
[LF] marking PWAs as lead-free
My recommendation is to approach this in stages - first, all components
that will be used on LF assemblies must be RoHS compliant, and it is my
opinion that these can be used in existing lead based processes,
although some process parameters must be modified to ensure proper
wetting. Verify that either your existing components are compliant, or
are not and a compliant component is available (in which case you must
determine how much of your existing stock will be used up by the cutover
date and how much may need to be disposed of in another manner), and
which components are not available in a compliant version in which case
the product designers need to be involved. Do the same exercise with
bare boards.
Once you have all compliant components and boards, set a date to cutover
to LF solder (yes, go home Friday running tin/lead, come in Monday and
start running LF.
I don't think you need to change part numbers of components, but it will
be a major chore keeping track of your current inventory, and a FIFO
system must be followed with no exceptions.
But I tend to oversimplify things.
Blair Hogg
QA Manager
GAI-Tronics Corporation
>>> [log in to unmask] 02/08/05 10:40AM >>>
Your point is good. However, our system is such that t
Camille,
Your point is good. However, our system is such that to change the
underlying parts on a BOM requires an ECO (Engineering Change Order) and
data entry, not to mention new parts to buy and double the bins in the
stockroom. There has to be some form of traceability to know the
history of your changes.
There is no easy way out of this mess. We have to face the fact that
this is going to be an enormous task and we will make implementation
mistakes. We are humans and we are prone to making mistakes... not that
I would <grin>.
Wouldn't it be nice if we could go home on Friday night running tin/lead
and start Monday morning lead-free.
Just my opinion.
Phil
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Camille Good
Sent: Monday, February 07, 2005 5:09 PM
To: [log in to unmask]
Subject: [LF] Putting new part numbers on RoHS components - was Re: [LF]
marking PWAs as lead-free
From my limited knowledge:
Against adding new part numbers - A LOT of extra
paperwork and hassle as you go through all your old
part numbers.
For adding new part numbers - It becomes a LOT easier
to make sure an assembly is RoHS-compliant. Just look
at the BOM and make sure that none of the old-style
part numbers are on the supposedly RoHS-compliant BOM.
My experience with people is that simpler systems
lead to less opportunities for mistakes,
misunderstandings or forgotten steps. But making a
system simple (in this instance) for manufacturing
means a LOT more work on the data-entry side.
So, it is really a philosophical decision. Which
are you most worried about occurring, a mistake which
will put a non-RoHS compliant part on a supposedly
RoHS-compliant assembly, or extra costs, personnel
time, overhead, opportunity costs, etc. from the
duplicate parts numbers being put in the system?
If you know that your system is rock-solid,
mistakes on BOMs are rare if ever, your personnel are
all well-trained about which parts to take from which
bins and it is generally unlikely that a non-RoHS
compliant part will be put in a
should-be-RoHS-compliant assembly and you are in a
low-margin or very competitive segment of the market
where extra data-entry and -tracking personnel are not
really affordable, then you might get by with only
having new part numbers for non-backwards-compatible
parts.
But if you know you are going to have both leaded
and lead-free assemblies being built in the same
factory for quite some time and you have any worries
about human error causing non-RoHS-compliant parts (or
worse, leaded solder!) to be used in a
supposedly-RoHS-compliant product or assembly line,
then a whole different set of part numbers for ALL
RoHS-compliant components is probably the way to go.
That way, personnel training is simpler - assemblers
know if it's used on the RoHS line then it had better
come from a bin of parts with the new part numbers,
receiving and purchasing know that any component that
goes in bins with the new part numbers had better be
RoHS-compliant, and if there is a question about a
particular assembly being RoHS-compliant it is easy to
scan through the BOM and make sure all the components
have the new part numbers.
-Camille
Portland, Oregon
*******************************************************************
This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.
This footnote also confirms that this email message has been swept
for the presence of computer viruses.
www.hubbell.com - Hubbell Incorporated
------------------------------------------------------------------------
-------Leadfee Mail List provided as a service by IPC using LISTSERV
1.8d
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks
send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
------------------------------------------------------------------------
-------
-----------------------------------------
This message (including any attachments) may contain confidential
information intended for a specific individual and purpose. If you are not
the intended recipient, delete this message. If you are not the intended
recipient, disclosing, copying, distributing, or taking any action based on
this message is strictly prohibited.
-------------------------------------------------------------------------------Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-------------------------------------------------------------------------------
|
