I have seen it where the customer request that an alternate part list is available. Just imagine a part is all of sudden obsolete and it is used in 15 board boards. An alternate part is found and you fix only 14 drawings. An order is placed for all 15 different types of boards and you are not ready. On the other hand, add it to the alternate part list drawing and your save a lot of headaches and time. It is necessary to make it part of the main flow down. That way is also visible
Regards,
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Clyde Sprowl
Sent: Monday, August 02, 2004 3:53 PM
To: [log in to unmask]
Subject: Re: [TN] Lead Finish
My experience tells me alternate parts list drawings end up not being
used, cause errors and are themselves constantly out of date. They fall
into disuse because your users won't trust them. To me, they're more
like an uncomfortable pair of crutches and don't really fix the root
problem of bad drawing content. A draftsman's job is to "make plain".
APL drawings don't get it done. (My 2 cents)
Sincerely,
Clyde Sprowl
800-946-7513 X3106
>>> [log in to unmask] 08/02/04 02:24PM >>>
Hi Kenny:
Agree, you should give yourself some wiggle room. An alternate
part list drawing will also work. This drawing will affect all drawing.
So every time you want to add a part to the drawings all you have to do
is add it to the alternate part list. The drawing should have a table of
components with two or more columns. On the left the alternate part and
on the right of it the parts it is replacing.
Regards,
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Clyde Sprowl
Sent: Monday, August 02, 2004 12:53 PM
To: [log in to unmask]
Subject: Re: [TN] Lead Finish
Your note should say "Leads shall be solder coated using SN63 or (your
company name) Engineering approved equivalent. Contract Manufacturer
shall secure written deviation from this requirement in advance."
This will allow you to change requirements without changing your
drawings every time, and still provide a paper trail. Also, if your
company is like most, the order of procurement authority has the
Purchase Order the supreme authority. You Purchasing department should
be able to amment the requirements by issuing a PO suppliment.
Sincerely,
Clyde
>>> [log in to unmask] 08/02/04 11:36AM >>>
I have a question on defining a lead finish on magnetics made by CM's.
On our magnetics design drawings we currently call out SN63 for a lead
finish but we have a contractor that wants to us SN60. We don't have a
problem using SN60 but we'll have to change all our drawings to accept
it. When we change to Lead Free solder in the future we'll have to
change all our drawings again.
I'm wondering if there is a better way to call out a lead finish i.e.
"Lead finish shall be solderable" or something simple like that. Or
maybe there is a spec I can call out.
What do others of you do for specifying lead finish on internally
designed components that are manufactured by a CM?
Thanks to all,
KennyB
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts 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
847-509-9700
ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts 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 847-509-9700
ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts 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 847-509-9700
ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts 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 847-509-9700 ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts 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 847-509-9700 ext.5315
-----------------------------------------------------
|
