J-STD rev.B in front of me. You are correct, it does say to the midpoint of the lower bend radius. My opinion is this is a mistake. -----Original Message----- From: Daan Terstegge [mailto:[log in to unmask]] Sent: Thursday, July 29, 2004 3:03 PM To: [log in to unmask] Subject: Re: [TN] Toe-down configuration for gull wing leads Hi Charles, This kind of problem is exactly why I ask the question. Normal requirement is indeed having an amount of solder in the heel which is equal to the leadthickness (for class 3), but for toe-down the solder must extend to the midpoint of the lower bend, which is -as you say- not always possible. Therefore it is important to know if one has to look at the whole lead, the last millimeter of the lead, the last 10th of a millimeter or whatever. When (only) the last few mils of the tip of the lead are parallel to the pad, would that mean it is no longer a "toe-down configuration" ? Accepting your definition, my question would be: which part of the lead is exactly defined as the "foot of the lead" ? Daan ----- Original Message ----- From: "Charles Caswell" <[log in to unmask]> To: <[log in to unmask]>; <[log in to unmask]> Sent: Thursday, July 29, 2004 9:15 PM Subject: RE: [TN] Toe-down configuration for gull wing leads If the foot of the lead is not parallel to the pad it is toe down. The solder requirement would be one lead thickness, On toe down this does not usually come up to the heel bend radius.I have trouble with this every time. Inspectors want to see the fillet above the midpoint of the heel, but with toe down it is not always possible or practical. -----Original Message----- From: Daan Terstegge [mailto:[log in to unmask]] Sent: Thursday, July 29, 2004 12:12 PM To: [log in to unmask] Subject: [TN] Toe-down configuration for gull wing leads Hi Technet, The IPC-A-610 (and related specs) mentions special requierments for solder joint heel fillets when the leads have a "toe down configuration". I was wondering if a definition exists of what exactly a toe down configuration is. If the last portion of the tip of the lead is not 100% parallel with the solderpad but has a small angle, does that mean it's a toe down configuration ? You help is appreciated as always, Daan Terstegge http://www.smtinfo.net --------------------------------------------------- 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 -----------------------------------------------------