Great idea Chet! A good addition. Yes, capacitors are the toughest. So many different working voltages.
With items like ICs we try to have the YYYY number be the significant part of the PN but usually we just assign them sequentially as we need them.
Hardware like screws, nuts, etc.. is really a mess and that's why I want to update the system. A bear I know, but it's got to be done.
Thankfully I just have to design it - someone else has to make the changes in the MRP system !
Bob Landman
H&L Instruments, LLC
On Sep 8, 2010, at 3:52 PM, Harner, Chester wrote:
> I have also used the EEM numbers and it worked very well. I added
> Military type numbering to the 4 digit number. Example. A well known
> thru hole resistor is the RLR07C1002FM; Replace the RLR07 with 4700 and
> you get:
> 4700C1002FM; where the C indicates terminal type, 1002 is of course the
> ohmic value (3 significant digits and a multiplier), F is the tolerance
> and M is a military failure rate. The 4700 hundred covers "Resistor,
> fixed value, film, 1/4 Watt, and size. Other letters can be used for
> size or what ever, it you don't want the basic number to cover all of
> that. Alternating numbers and letters also helps in reading the number.
>
> There are many military specs, the basic RLR spec is MIL-PRF-39017, with
> various "slash" numbers for various types or sizes of resistor.
>
> Capacitors are a bit more difficult because they can have so many
> variables, but it can be worked out.
>
> Chet
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Landman
> Sent: Wednesday, September 08, 2010 2:07 PM
> To: [log in to unmask]
> Subject: Re: [TN] Resistor part numbers
>
> Good idea Chet. I wish we'd done that. I will be updating our
> numbering system and when I do,
> this will be added. We didn't use letters initially but soon we changed
> when we had to deal with
> resistors like 0.1 ohms (added the R for the decimal point).
>
> Is there a published listing of the MMM where I can grab a copy?
>
> Bob Landman
> H&L Instruments, LLC
>
>
> On Aug 27, 2010, at 8:20 AM, Harner, Chester wrote:
>
>> The Military part number system has provided this kind of part number
>> for more years than I care to admit to: and most manufactures use
>> similar type part numbers, all using the Military codes for tolerance:
>> T=.01%, A = .05%, B = 0.1%, D = 0.5%, F = 1.0%, g = 2.0% and J=5.0%.
>>
>> I have set up PN systems for several companies and all were based on
> the
>> Military/Manufacturer Model and seem to work well. The part number is
>> readable, can put parts together on the shelves etc.
>>
>> Chet Harner
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Robert Kondner
>> Sent: Thursday, August 26, 2010 3:21 PM
>> To: [log in to unmask]
>> Subject: Re: [TN] Resistor part numbers
>>
>> Consider using a log scale for the numeric value unless it needs to be
>> human
>> readable.
>>
>> Bob Kondner
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Genny Gibbard
>> Sent: Thursday, August 26, 2010 4:38 PM
>> To: [log in to unmask]
>> Subject: Re: [TN] Resistor part numbers
>>
>> I appreciate that there are possibly better ways to do things. There
>> are both pros and cons to the way we choose. Right now we are not
>> looking to change our PN system. That is a huge project in itself,
> and
>> would take months and $$$ to implement. At the moment our system
> works
>> and has worked for this company for over 20 years.
>> I am just looking for some quick and dirty ideas how someone else with
> a
>> similar PN system might choose or has chosen to name a PN for 0.1%
>> precision.
>>
>> -----Original Message-----
>> From: Robert Kondner [mailto:[log in to unmask]]
>> Sent: August 26, 2010 2:32 PM
>> To: 'TechNet E-Mail Forum'; Genny Gibbard
>> Subject: RE: [TN] Resistor part numbers
>>
>> Genny,
>>
>> I have lived and breathed this part number stuff for about 20 years.
>>
>> I would bet your immediate reason for using a semi-intelligent part
>> number system is so you can find things. Most apps give you a big list
>> and you need to run down that list finding something.
>>
>> The second main use for the part number is having a unique ID that
>> allows a specific part with specific characteristics to be specified
> in
>> a list(BOM).
>>
>> What folk do is merge these two requirements into a single
>> semi-intelligent part number. Problem is that naming system eventually
>> needs to be reorganized but since the part numbers are in use you are
>> stuck. With two people doing the "Naming" things also can run amuck.
>>
>> It does not have to be this way. What you can do depends on what
>> existing data system you have in place and how far outside the box you
>> are willing to go.
>>
>> Contact me off line bob <funny a in circle> kondner period com
>>
>> Thanks,
>> Bob Kondner
>> 410-821-1315
>> Index Designs
>> Baltimore Maryland USA 21286
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Genny Gibbard
>> Sent: Thursday, August 26, 2010 4:04 PM
>> To: [log in to unmask]
>> Subject: [TN] Resistor part numbers
>>
>> We use a semi-intelligent internal PN system. To date, our resistors
>> are usually 5% or 1%. For 5%, we use 2 sig digits plus a multiplier
>> digit for the value, plus a letter code to indicate size. For 1%, we
>> use 3 sig digits plus a multiplier plus the letter code.
>> We now have a requirement to make some 0.1% resistor part numbers. We
>> are struggling with how to define it in our system. The thought was
> to
>> do 4 digits plus a multiplier, but to add to the confusion, the parts
>> are 1K and 2K21. This would mean the PN would have a number like
> 10000
>> for 1K and 22100 for 2K21.
>> Does anyone have any other ideas?
>>
>> Genny
>>
>> ______________________________________________________________________
>> This email has been scanned by the MessageLabs Email Security System.
>> For more information please contact helpdesk at x2960 or
>> [log in to unmask]
>> ______________________________________________________________________
>>
>> ---------------------------------------------------
>> Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 847-615-7100 ext.2815
>> -----------------------------------------------------
>>
>>
>> ______________________________________________________________________
>> This email has been scanned by the MessageLabs Email Security System.
>> For more information please contact helpdesk at x2960 or
>> [log in to unmask]
>> ______________________________________________________________________
>>
>> ---------------------------------------------------
>> Technet Mail List provided as a service by IPC using LISTSERV 15.0
>> 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
>> 847-615-7100 ext.2815
>> -----------------------------------------------------
>>
>>
>> ______________________________________________________________________
>> This email has been scanned by the MessageLabs Email Security System.
>> For more information please contact helpdesk at x2960 or
>> [log in to unmask]
>> ______________________________________________________________________
>>
>> ---------------------------------------------------
>> Technet Mail List provided as a service by IPC using LISTSERV 15.0
>> 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
> 847-615-7100
>> ext.2815
>> -----------------------------------------------------
>>
> ------------------------------------------------------------------------
> --------
>> We value your opinion! How may we serve you better?
>> Please click the survey link to tell us how we are doing:
>> http://www.craneae.com/ContactUs/VoiceofCustomer.aspx
>> Your feedback is of the utmost importance to us. Thank you for your
> time.
>>
> ------------------------------------------------------------------------
> --------
>> Crane Aerospace & Electronics Confidentiality Statement:
>> The information contained in this email message may be privileged and
> is
>> confidential information intended only for the use of the recipient,
> or any
>> employee or agent responsible to deliver it to the intended recipient.
> Any
>> unauthorized use, distribution or copying of this information is
> strictly prohibited
>> and may be unlawful. If you have received this communication in error,
> please notify
>> the sender immediately and destroy the original message and all
> attachments from
>> your electronic files.
>>
> ------------------------------------------------------------------------
> --------
>>
>> ______________________________________________________________________
>> This email has been scanned by the MessageLabs Email Security System.
>> For more information please contact helpdesk at x2960 or
> [log in to unmask]
>> ______________________________________________________________________
>>
>> ---------------------------------------------------
>> Technet Mail List provided as a service by IPC using LISTSERV 15.0
>> 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 847-615-7100
> ext.2815
>> -----------------------------------------------------
>>
>
>
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please contact helpdesk at x2960 or
> [log in to unmask]
> ______________________________________________________________________
>
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 15.0
> 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 847-615-7100
> ext.2815
> -----------------------------------------------------
> --------------------------------------------------------------------------------
> We value your opinion! How may we serve you better?
> Please click the survey link to tell us how we are doing:
> http://www.craneae.com/ContactUs/VoiceofCustomer.aspx
> Your feedback is of the utmost importance to us. Thank you for your time.
> --------------------------------------------------------------------------------
> Crane Aerospace & Electronics Confidentiality Statement:
> The information contained in this email message may be privileged and is
> confidential information intended only for the use of the recipient, or any
> employee or agent responsible to deliver it to the intended recipient. Any
> unauthorized use, distribution or copying of this information is strictly prohibited
> and may be unlawful. If you have received this communication in error, please notify
> the sender immediately and destroy the original message and all attachments from
> your electronic files.
> --------------------------------------------------------------------------------
>
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
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 847-615-7100 ext.2815
-----------------------------------------------------
|
