Richard,

Thank you so much for replying back.
I'm sorry my note was short.  I have more work right now than I need.
RH is short for Radial - lead component insertion machine.
I want to make sure I understand you so I well give
 you my interpretation on your reply.

Decimals of inch .014 Converts to 0.3556 millimeters
Decimals of inch .020 Converts to 0.5080 millimeters

So if your lead was 0.020" ( inch ) than your Hole dimension would be 0.034"± 0.004 (inch ) 

Therefore if our lead is 0.5080mm (millimeters) the 
the hole size would be 0.8636mm ± 0.10 (millimeters)

The hole dimension is 1.1 ± 0.1 millimeter 
So I can ask our design department for a design 
change 
From the 1.1mm±.1 to a 0.8636 mm ± 0.1
A change of 0.2364mm

That is my interpretation of your reply.
Do I have it right or am I brain dead this morning I have not not not not had time to check yet.
Thanks for your help.
Merry Christmas
Nancy 


equipment
manufacturer recommended. Specifically, we do .014" over lead diameter for
the hole as a general format. We generally have 3 different lead diameters
which relate to 3 hole sizes for automatically inserted components.

It is Friday, so I am bit thick, but I do not understand the RH. So, to
continue with comments on your information, my belief is that it could be a
situation of oversized hole with a possibility of clinch angle and length
thrown in for good confusion. Remember the lead will only take up a certain
amount of the hole and the solder needs to fill in the rest. If the hole is
oversized, and the lead is short, or not at a good holding angle, you could
have all sorts of 'wonderful things' happen as a result.

I hope I am not too far off base on your question. If so, feel free to slap
me around and wake me up. If I can lend any more help (or confusion!) just
holler!

Richard Hamilton
Clemar Mfg. / Rain Bird
[log in to unmask] 

> -----Original Message-----
> From: Nancy Trumbull [SMTP:[log in to unmask]] 
> Sent: Friday, December 10, 1999 8:41 AM
> To:   [log in to unmask] 
> Subject:      [TN] PTH Design question
> 
> Hi Netters,
> 
> First let me wish each and every one of you a Very Merry Christmas and a
> Happy and Save New Year
> from us here in Michigan
> 
> Now my problem: Aluminum Condenser that is being inserted by the RH is
> leaning out of specification.
>  
> I have checked 
>           clinch = OK
>           clinch direction = OK
>            Hole dimensions= 1.1 ±0.1 OK
>            Lead radius = 0.5  OK
> All are with-in standard
> Yes, I know for many of you this may be a very easy question, but I still
> need help.
> Question that is on my mind is for design.
> Is the Hole dimension to large for the Lead radius?
> I do not know PCB design so I would like some information before I ask for
> a design change.
> Or does any one have any other ideas 
> Hey I might be one of the old ones in QA but I'm up for new ideas every
> day.
> I'll keep my thinking cap on until some one gives me a better idea or I
> figure it out
> Thank You All in Advance.
> Nancy
> 
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