THANKS a lot and have a nice weekend. Roger Stoops wrote: > 1. IPC's online catalog only shows the IPC-2615 as an active > publication, but another search indicates that IPC-D-300 was partially > superceded by 2615. A closer inspection shows some major differences > between the documents, and hence the reason for the partial > obsolescence. 300G outlines the basic tolerances and allowances for > pcb fabrication (as found in other IPC documents as standards and > guidelines), but gives very little information on GD&T (Geometric > Dimensioning and Tolerancing). This document may still have some uses > in a few cases, but most everything is covered in newer documents. > 2615 seems to put its emphasis on only GD&T at it relates to printed > circuit/wiring boards and assemblies. It more closely follows the > ANSI/ASME GD&T standard ASME Y14.5M-1994.2. I prefer to use documents > such as IPC-2221, 2222, 2223, and 2615. The 2221, 2222, and 2615 are > used in the PWB Designer Certification study course (not 300G...).Best > Rgds,Roger Stoops, C.I.D.Trimble Navigation Ltd. > > -----Original Message----- > From: Ong Seet Leng [mailto:[log in to unmask]] > Sent: Thursday, August 22, 2002 10:07 PM > To: [log in to unmask] > Subject: [TN] IPC Printed Board Dimension and Tolerances > > Morning Everyone, I came across the latest IPC PUBLICATION > CATALOG and in page 20 under the DESIGN heading, it was > stated that IPC-2615 (Printed Board Dimensions and > Tolerance) Supersedes IPC-D-300G (Printed Board Dimensions > and Tolerances) . > > Upon digging in further (from another source), I found that > for IPC-D-300G is still ACTV under the status column. > > My questions: > 1. IPC-D-300G had been supersedes by IPC-2615, how come > it is still ACTV under the status column? > > 2. Are we to follow either IPC-300G (last revision G > January 1984) or IPC-2615 or both? > > More over if I am not mistaken, there is no mentioning in > IPC-2615 that it had supersedes IPC-300G (except in the > catalog) as they sometimes do in other IPC specifications. > > Any help or clarifications would be very much appreciated. > > Thanks all in advance. > > Regards > S L Ong > --------------------------------------------------------------------------------- > Technet Mail List provided as a free 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/html/forum.htm for > additional information, or contact Keach Sasamori at > [log in to unmask] or 847-509-9700 ext.5315 > --------------------------------------------------------------------------------- > > --------------------------------------------------------------------------------- > Technet Mail List provided as a free 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/html/forum.htm for additional information, or > contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > --------------------------------------------------------------------------------- --------------------------------------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------