TECHNET Archives

July 2014

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Steve Gregory <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Steve Gregory <[log in to unmask]>
Date:
Thu, 17 Jul 2014 12:26:17 -0600
Content-Type:
text/plain
Parts/Attachments:
text/plain (112 lines)
Hey Ed!

These might work pretty good! Thanks! It's going kinda' tedious, but
probably better than scrapping the parts...

Steve


On Thu, Jul 17, 2014 at 12:06 PM, Ed Popielarski <[log in to unmask]
> wrote:

> I've had great success with using this tool to remove the enamel coating.
> Price here is reasonable. Yeah, HiRel.
>
> http://www.micromark.com/tweezer-sprue-cutter-despruing-tweezer,8012.html
>
> Ed Popielarski
> Engineering Manager
>
>
>                                970 NE 21st Ct.
>                               Oak Harbor, Wa. 98277
>
>                               Ph: 360-675-1322
>                               Fx: 206-624-0695
>                               Cl: 949-581-6601
>
>        “It's one kind of victory to slay a beast, move a mountain, and
> cross a chasm, but it's another kind altogether to realize that the beast,
> the mountain, and the chasm were of your own design.”
>
> https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&spn=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
> Sent: Thursday, July 17, 2014 10:46 AM
> To: [log in to unmask]
> Subject: [TN] Removing insulation from inductor wire..
>
> Hi All!
>
> I'm trying to deal with all the smoke that's here in Boise today, it's
> probably the worst smoke I've ever been in. The jet stream has made a dip
> and is carrying all the smoke from the fires in Washington, Oregon, and the
> fire north of us in Boise county right into the Treasure Valley and it's
> all packing up against the mountains to the west of us (cough, cough..)
>
> Anyways, I have a question about a little custom inductor from Vishay
> Hirel that we have here. It appears that we have a certain datecode batch
> of these where the insulation on the part of the wire that gets soldered
> into the board wasn't stripped and tinned high enough, and now when we try
> to install them into the board the insulation prevents wetting at the top
> of the board and we have insulation in the solder joint which of course is a
> defect:
>
> http://stevezeva.homestead.com/Vishay_Inductor.jpg
>
> The picture is of one that we pulled out of a board, and you can see that
> the insulation goes down past the shoulders and into what is supposed to be
> the solderable area.
>
> I think I know the answer to my next question, but I'll ask it anyway. Is
> there any clever way to remove that insulation without damaging the
> inductor? The picture makes this inductor look huge, but it's not, it's
> maybe .250" in diameter, and the wire is a pretty small gage too.
>
> I tried dipping it first in a lead-free tinning pot set at 600 C., no
> luck, then 700 C., no luck, then 800 C., and no luck. I was able to darken
> the insulation and melt the yellow tape that wraps the inductor, but that's
> about it. I'm think that the only way to remove this insulation is
> mechanically...which will be a trick because the inductor and wire is
> pretty small.
>
> Hate to scrap these things because they are long lead custom inductors.
> But we can't use them like they are....
>
> Steve
>
> --
>
>
> This email and any attachments are only for use by the intended
> recipient(s) and may contain legally privileged, confidential, proprietary
> or otherwise private information. Any unauthorized use, reproduction,
> dissemination, distribution or other disclosure of the contents of this
> e-mail or its attachments is strictly prohibited. If you have received this
> email in error, please notify the sender immediately and delete the
> original.
>
>
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud service.
> For more information please contact helpdesk at x2960 or [log in to unmask]
> ______________________________________________________________________
>

-- 


This email and any attachments are only for use by the intended 
recipient(s) and may contain legally privileged, confidential, proprietary 
or otherwise private information. Any unauthorized use, reproduction, 
dissemination, distribution or other disclosure of the contents of this 
e-mail or its attachments is strictly prohibited. If you have received this 
email in error, please notify the sender immediately and delete the 
original. 

______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

ATOM RSS1 RSS2