Thanks Ted. OK, do you know the new IPC number for that IPC-D-125 standard? Just checked both my IPC catalogue and the online search, nothing!
Is it now called IPC-A-325 by chance? Is this the one used to specify documentation and nothing but the mountains of documentation? I believe that I have seen it years ago. As for your comments about your experiences and practices, right bang on the money as far as I can compare with my experiences. Early in my career I would get boards from vendor A, they were great. Need boards from vendor B and they would vary significantly, their excuse would be that I hadn't defined enough information for them to fabricate or assess acceptability. Thus the God created Fab Dwgs and the populace saw that Fab Dwgs were good. 8^> Oh forgot to mention, all the times that I got called to the assembly line because a hole size was wrong and they couldn't fit a component into the board. After the creation of fab drawings, they no longer called me, they also no longer started producing the boards only to find a problem somewhere down the assembly line. Why? Because they now checked (QC - you know that little ugly insidious word) incoming boards and knew that they were correct before they fired up the production line. Ted, I hear you all too clearly, I don't know why so many others are adamantly against this practice to the point where they try to shame us into the fact that we are weird, anal or just love doing excess work. I am as lazy as the next person but I also don't want to get ripped off for product which doesn't meet my (the company's) needs. I have come to realize although a fair number of the participants to this list server are very bright people and their knowledge sound, however they have exposure to only one or two fab houses for years and years on end. Seems to develop a tunnel vision mentality that makes them feel secure in their less than ideal practices. Then they try to preach to us, the already devoted. I developed my undying adoration for Fab dwgs at one employer where we purchased our PCBs in various shops usually located in China, Hong Kong, Singapore, India or Korea. Try doing that without very complete and thorough Fab Dwgs. You (and your employer) won't survive long without Fab Dwgs. Sincerely, Brad Velander. Lead PCB Designer Norsat International Inc. Microwave Products Tel (604) 292-9089 (direct line) Fax (604) 292-9010 email: [EMAIL PROTECTED] http://www.norsat.com Visit us at Booth 2G2-09 at CommunicAsia 2002 in Singapore June 18-21. > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > Sent: Friday, May 17, 2002 9:58 AM > To: Protel EDA Forum > Subject: Re: [PEDA] OT Too many hole sizes > > > Brad, > IPC is telling designers that documentation is something that is > determined by the designer and the board house. <SNIP> > Get a > hold of IPC-D-125A you can get the list of drawings that can > be used/needed > to build on a large scale production by multiple board > houses. Here is a > list of some of the drawings that could be used; Drill > pattern, Printed > board profile (dimensions of the board), Master drawing with > fab notes, > (drawing for each layer with flags for important fabrication > notes), master > drawing for assembly info. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://email@example.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *