TECHNET Archives

July 2016

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:
Yuan-chia Joyce Koo <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Yuan-chia Joyce Koo <[log in to unmask]>
Date:
Thu, 28 Jul 2016 19:32:35 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (227 lines)
well, just treat it with kid glove... or cross section, open it all  
up...and see what is going on inside.... assessing yourself...  
(possibly the result is still needto be treat it with kid glove ;-).
On Jul 28, 2016, at 6:33 PM, Steve Gregory wrote:

> Hi again Joyce,
>
> Just tried to x-ray it with our Glenbrook x-ray, we just don't have  
> the
> juice to see through it...
>
> Steve Gregory
>
> On Jul 28, 2016 4:09 PM, "Yuan-chia Joyce Koo" <[log in to unmask]>  
> wrote:
>
>> opps, too quick... if you get a diode...wb could be a problem...
>> On Jul 28, 2016, at 5:03 PM, Steve Gregory wrote:
>>
>> Hi Joyce!
>>>
>>> Yep, as far as I can tell. There isn't much of a datasheet for  
>>> the relays
>>> that we are using, but it shares the same vibration and shock  
>>> specs as the
>>> Teledyne relays, so that tells me that they are very similar:
>>>
>>>
>>> http://www.te.com/commerce/DocumentDelivery/DDEController? 
>>> Action=srchrtrv&DocNm=PRMAC-26X&DocType=DS&DocLang=English
>>>
>>> Steve
>>>
>>>
>>>
>>> On Thu, Jul 28, 2016 at 2:18 PM, Joyce Koo <[log in to unmask]> wrote:
>>>
>>> something similar to this internally?  if there are wire bonds  
>>> connect to
>>>> the transient suppression diode, or some other tricky  
>>>> interconnect, it
>>>> might be...'
>>>> http://www.teledynerelays.com/pdf/electromechanical/432.pdf
>>>> steve, do you have internal construction x-ray image? TO-5 is  
>>>> very strong
>>>> seal using glass, interconnect using spot weld to the leads may  
>>>> not be
>>>> easy to damaged, depend upon how it constructed.  my 1.4 cents.
>>>> http://www.teledynerelays.com/pdf/electromechanical/432.pdf
>>>>
>>>>  jk
>>>> http://www.teledynerelays.com/pdf/electromechanical/432.pdf
>>>>
>>>>> Steve,
>>>>> Do they have PROOF that bending the leads cause damage?
>>>>> Bev
>>>>>
>>>>> -----Original Message-----
>>>>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
>>>>> Sent: Thursday, July 28, 2016 11:12 AM
>>>>> To: [log in to unmask]
>>>>> Subject: [TN] Prepping TO-5 can style Relay...
>>>>>
>>>>> Hi All,
>>>>>
>>>>> We're building a board for a customer that uses a 8-lead TO-5  
>>>>> style
>>>>>
>>>> relay.
>>>>
>>>>> The footprint on the board requires that the leads are spread  
>>>>> out to a
>>>>> larger diameter circle than what diameter is when they come out  
>>>>> of the
>>>>> body
>>>>> at the bottom of the relay. Here's the information for one of the
>>>>> relays,
>>>>> there are three others that are the same style:
>>>>>
>>>>>
>>>>>
>>>> http://www.digikey.com/product-search/en? 
>>>> lang=en&site=us&WT.z_cid=ref_findch
>>>>
>>>>> ips_standard&mpart=PRMAC-26X
>>>>>
>>>>> So we have a Simonds CLP274 lead processor with a die that  
>>>>> matches the
>>>>> footprint on the PCB:
>>>>>
>>>>> http://stevezeva.homestead.com/Simonds_CLP274.jpg
>>>>>
>>>>> We insert the part which spreads the leads out, then step on  
>>>>> the pedal
>>>>>
>>>> and
>>>>
>>>>> a guillotine style blade shears the leads off. I've used the  
>>>>> prep unit
>>>>> many, many time before at previous employers without issues. The
>>>>> customer
>>>>> is saying that prepping the leads in this unit is damaging the  
>>>>> relay. So
>>>>> now we are to pot the leads before prepping them with a 2-part  
>>>>> epoxy
>>>>>
>>>> using
>>>>
>>>>> a tooling fixture as a mold for the epoxy, and the potted relay  
>>>>> looks
>>>>>
>>>> like
>>>>
>>>>> this:
>>>>>
>>>>> http://stevezeva.homestead.com/Potted_Relay.jpg
>>>>>
>>>>> Has anybody ever heard of this Simonds unit damaging relays  
>>>>> like this?
>>>>>
>>>> Has
>>>>
>>>>> anybody had to add potting to a relay like this? I can understand
>>>>> wanting
>>>>> to keep the leads coming straight out of the bottom of the body  
>>>>> before
>>>>> making the bend to match the footprint on the board, but I  
>>>>> think I can
>>>>>
>>>> use
>>>>
>>>>> a Bivar permanent spacer and slip it over the lead and  
>>>>> accomplish the
>>>>>
>>>> same
>>>>
>>>>> thing. Something like this:
>>>>>
>>>>>
>>>>>
>>>> https://www.google.com/url? 
>>>> sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0ahUKEwi
>>>>
>>>>> qk8zCt5bOAhWJ1IMKHebaCR8QFggxMAE&url=http%3A%2F%2Fwww.bivar.com
>>>>>
>>>> %2Fportals%2F
>>>>
>>>>>
>>>>> 0%2Fproducts% 
>>>>> 2F616-070.pdf&usg=AFQjCNESVvvX6qOo_-0T94sAYNLP8AJ21Q&cad=rja
>>>>>
>>>>> Or even a nylon washer that matches the diameter of the lead  
>>>>> pattern
>>>>> (.200") coming out of the bottom of the relay. Potting this  
>>>>> relay is
>>>>>
>>>> going
>>>>
>>>>> to be very time consuming and there's going to be a risk of  
>>>>> getting the
>>>>> epoxy on the leads that will ruin the solderability of the  
>>>>> part. I'm
>>>>> just
>>>>> trying to understand if it is truly the Simonds prep unit  
>>>>> causing the
>>>>> damage, and if this really is, and easier way other than  
>>>>> potting them to
>>>>> accomplish the same thing.
>>>>>
>>>>> Thanks all!
>>>>>
>>>>> Steve Gregory
>>>>>
>>>>> --
>>>>>
>>>>>
>>>>> 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 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 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.

ATOM RSS1 RSS2