Victor,
left top side click on the British flag and go to connectors...
Torsten
Dipl.Ing.(FH)Torsten Hagge
tech. projectmanager
Kristronics GmbH
Gewerbegrund 5 - 9
24955 Harrislee
Tel.: +49 461 7741 624
Fax: +49 461 7741 642
[log in to unmask]
www.kristronics.de
Gerichtsstand Flensburg, Handelsregister: HRB 1433 FL
Geschäftsführer Dipl.-Ing. oec. Thormod Ohm
Ust-Id-Nr. DE 811182059
Bankverbindung: Deutsche Bank AG Flensburg, Konto-Nr. 4216610, BLZ 21570011
IBAN: DE32 2157 0011 0421 6610 00, BIC: DEUT DE HH 215
-----Ursprüngliche Nachricht-----
Von: TechNet [mailto:[log in to unmask]] Im Auftrag von Victor Hernandez
Gesendet: Freitag, 27. August 2010 12:09
An: [log in to unmask]
Betreff: Re: [TN] AW: [TN] soldered battery wire - breaking problem
I was unable to read what is to be German. Where do I change language format.
www.provertha.com
Victor,
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Temkin, Gregg
Sent: Thursday, August 26, 2010 3:54 PM
To: [log in to unmask]
Subject: Re: [TN] AW: [TN] soldered battery wire - breaking problem
Hallelujah! - I've been looking for an inexpensive little knick-knack that will allow discrete wires to be soldered directly to a PCB and provide some level of strain relief from handling and assembly motions. Burndy used to have a similar product, but it was discontinued when they got absorbed by FCI. This style of part eliminates the extra time, artistry, and processing of adhesive bonding, takes up a minimal amount of room, and could eliminate the cost of a connector mated pair.
Thank you Torsten.
Gregg
-----Original Message-----
From: Torsten Hagge [mailto:[log in to unmask]]
Sent: Thursday, August 26, 2010 8:47 AM
To: [log in to unmask]
Subject: [TN] AW: [TN] soldered battery wire - breaking problem
Hi Carl,
as this process is not save for automotive we have to use special plastic strain reliefs where presoldered cables are placed in the plastic. Advantage is a faster assembly time and a safe process at our line.
Vendor e.g. is www.provertha.com, technology is called "wire clip connection technology".
best regards,
torsten
Dipl.Ing.(FH)Torsten Hagge
tech. projectmanager
Kristronics GmbH
Gewerbegrund 5 - 9
24955 Harrislee
Tel.: +49 461 7741 624
Fax: +49 461 7741 642
[log in to unmask]
www.kristronics.de
Gerichtsstand Flensburg, Handelsregister: HRB 1433 FL Geschäftsführer Dipl.-Ing. oec. Thormod Ohm Ust-Id-Nr. DE 811182059
Bankverbindung: Deutsche Bank AG Flensburg, Konto-Nr. 4216610, BLZ 21570011
IBAN: DE32 2157 0011 0421 6610 00, BIC: DEUT DE HH 215
-----Ursprüngliche Nachricht-----
Von: TechNet [mailto:[log in to unmask]] Im Auftrag von Carl VanWormer
Gesendet: Donnerstag, 26. August 2010 16:37
An: [log in to unmask]
Betreff: [TN] soldered battery wire - breaking problem
We produce a small module that is powered by a small battery in a plastic battery holder that has the standard red & black wires, which solder into two holes in in our PC board. After initial functional testing, the board (with battery holder attached) is sent out for conformal coating, then the boards are re-tested before inserting into our plastic enclosure. The most recent run of 50 boards returned from conformal coating with about 10 broken wires, with the break leaving Copper colored ends visible where the strands were ripped from the solder filled mounting hole. Since this problem is new, something in the assembly process (or conformal coating process) must have changed.
Once the battery holder and board are assembled into the plastic case, there is no more strain on the wires, so this is only a production and handling problem.
In reviewing the recent wire solder joints, compared to 2 samples from previous runs that did not exhibit this problem, I noticed that the "bad" assemblies had been heated enough to flow solder up into the wire strands, while the "good" assemblies had solder on the wire ends on the back side of the board, but the solder did not flow up the strands on the front side of the board. I'm guessing that the fused wire strands are stiffer, and this is the cause of the breakage during handling for the conformal coating process.
Many of us "old timers" remember the classic strain relief approach used in the battery wires for transistor radios, where the two wires were laced through a strain relief hole before being soldered onto the board.
Since our board has no room for the extra strain relief holes, and since we have made hundreds of these things without problems, I'm looking for suggestions on the best approach to solder the wires onto the board to help eliminate the problem.
Are there any IPC standards for attaching battery holder wires?
Thanks,
Carl
Carl Van Wormer, P.E., AE7GD
Senior Hardware Engineer
Cipher Systems
1800 NW 169th Place, Suite B-100
Beaverton, OR 97006
Cipher Systems (503) 617-7447 x 5163
Direct Line (503) 425-5163
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