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Missing primer warning light

 
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magic mike



Joined: 06 Dec 2011
Posts: 541

PostPosted: Wed Jan 25, 2012 5:05 pm    Post subject: Missing primer warning light Reply with quote

Hi everybody. Came up with a way to let me know if a primer failed to get inserted into a case. The following pictures should give y'all an idea of what I came up with. Seems to work pretty well but I am sure that I will be tweeking on it some more as time goes by. It's made up of stuff I had around the shop. I did put the decapping pin in my drill press and polish it a tad bit with some fine emery paper. Also had to drill and tap the end of it for the button head screw. The screw keeps the pin from falling out the bottom of the sizing die. I will most likely put a micro switch on it when ever I get over to Radio Shack to see what they have. I suppose you could also use a buzzer instead of a light but like I said, I used what I had lying around.

[img]
Ram in lowered position.


[/img]
1/2" X 1/2" X 1/16" aluminum angle.


[img]
Primer is present with ram at top of stroke.


[/img]
Primer is missing with ram at top of stroke.

[img][/img]
Light comes on when primer is present.

[img]
Extension to decapping pin.

[/img]
6-32 button head screw.

I set the length of the decapping pin so that it contacts the primer as soon as the primer slider is out of the way. Helps to keep the primer from moving around as it travels toward the case primer pocket.

Let me know what you think.

mike
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Horseman



Joined: 18 Jan 2009
Posts: 300

PostPosted: Wed Jan 25, 2012 9:08 pm    Post subject: Reply with quote

WOW....just WOW! Shocked
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rjbishop



Joined: 17 Nov 2011
Posts: 37

PostPosted: Wed Jan 25, 2012 9:12 pm    Post subject: Reply with quote

Mike,

Ingenious. I don't know that I would go to that trouble, but it's a slick idea. I also don't know if I would have the means to extend the decapping pin. Great idea- I'll bet others will latch onto this trick!

-rj-
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uniquedot



Joined: 03 Jul 2010
Posts: 304

PostPosted: Wed Jan 25, 2012 10:40 pm    Post subject: Reply with quote

Horseman wrote:
WOW....just WOW! Shocked


Exactly my thoughts when i saw it!
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darwin
Site Admin


Joined: 28 Jan 2008
Posts: 1905
Location: Central Indiana

PostPosted: Thu Jan 26, 2012 12:14 am    Post subject: Reply with quote

Wow. What an elegant solution. I had thought of rigging something like that up, but your version is so much better than anything I had thought of.
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magic mike



Joined: 06 Dec 2011
Posts: 541

PostPosted: Thu Jan 26, 2012 9:29 am    Post subject: Reply with quote

The extension of the decapping pin was easy. I used a piece of 1/16" ID brass tubing as a sleeve and a piece of .0625" diameter music wire for the extension. Stuck it all together with 4 minute JB weld. Drilling the hole in the end of the pin was the hardest thing as I don't have a lathe so I did it in my drill press using a vee block and honestly just got lucky hitting the center when I punched it. Old eyes and all that stuff............. Confused

mike
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prs



Joined: 24 Jan 2010
Posts: 792

PostPosted: Thu Jan 26, 2012 11:56 am    Post subject: Reply with quote

Rube Goldberg would blush!

prs
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bearing01



Joined: 09 Mar 2011
Posts: 74
Location: San Diego

PostPosted: Thu Jan 26, 2012 4:30 pm    Post subject: Reply with quote

I like it!
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Wildrat



Joined: 25 Aug 2009
Posts: 258

PostPosted: Sun Feb 05, 2012 7:30 pm    Post subject: Reply with quote

So if the primer is present the modified decap pin contacts the primer and pushes the modified decap tool up turning on the light?
If this is how it works isn't there a chance the primer could go off?
I am new to the load master so I will let you old decrepit LM users explain this further.
Wildrat
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magic mike



Joined: 06 Dec 2011
Posts: 541

PostPosted: Sun Feb 05, 2012 9:15 pm    Post subject: Reply with quote

There is no chance of the primer going off. The decap pin is a loose slip fit in the die and there is no voltage present at the end of the pin. Loaded 500 rounds last weekend and it worked great. Kind of a comforting feeling to know there is a primer present before the powder drops.

mike
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Wildrat



Joined: 25 Aug 2009
Posts: 258

PostPosted: Mon Feb 06, 2012 10:17 am    Post subject: Reply with quote

Yes, I understand. Voltage was not a concern. I was more concerned about the 1 in 99 without common sense that may not have it quite so free sliding if ya know what I mean. The same kind that point empty firearms at others and clean loaded firearms. Very Happy
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magic mike



Joined: 06 Dec 2011
Posts: 541

PostPosted: Mon Feb 06, 2012 12:05 pm    Post subject: Reply with quote

And so it is among humans.............................. Rolling Eyes

mike
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