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Re: Constant Casting Tempreture (Read 14476 times)

westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Constant Casting Tempreture Reply #15 - Nov 8^th, 2011 at 2:28pm	Print Post
	UtahDave wrote on Nov 8^th, 2011 at 9:33am: Boy has this topic run all over the place...laser bathtubs to cow magnets The infrared or gun type temperature meters won't work very well on molten lead because the emissivity (think how shiny the lead is or isn't) varies all over the place and hence the meter gets tricked. Emissivity is a factor that can vary from nearly 100% (black body) to a very low number for reflective metals. The handheld infrared meter might work on a mold if you painted a place black so the emissivity factor was close to one. I've been thinking of putting a small thermocouple into a mold but I hate to mess with molds. I bought a small Type K pyrometer (the electronic device to plug the thermocouple into) for about $35 on EBay. It works very well in the lead pot...just buy the stainless steel sheathed probe about 8 " long. I also get very consistant bullet weights when I can hold the temp to around 800 F to maybe 820 F (20:1 in a 207 gr Hoch .322 BS mold). I use a huge Dutch Oven pot of lead...maybe 50 pounds of more which helps with temperature stability. What temperature to others find works best for 32 cal castings? I've got to try preheating the mold on a hot plate...too many wasted bullets preheating and worse in the winter here in Salt Lake City. Dave Interesting about the infrared meters Dave. Joe.

	A blind squirrel runs into a tree every once in a while.
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BP Frequent Elocutionist Offline Posts: 8039 Location: Westside Joined: Aug 27^th, 2006	Re: Constant Casting Tempreture Reply #16 - Nov 8^th, 2011 at 2:53pm	Print Post
	So if I take a couple cow magnets, place them around the input line to my temp control cycling thermostat, and get them to rotate to induce a magnetic field flux, then.... What happened to John's original post?
	« Last Edit: Nov 8^th, 2011 at 3:03pm by BP »
	There are three kinds of men: The ones that learn by reading, the few who learn by observation, and the rest who have to pee on the electric fence and find out for themselves. Proud Noodlehead
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UtahDave Senior Forum Member Offline Posts: 396 Location: Heber City, Utah Joined: Aug 14^th, 2010	Re: Constant Casting Tempreture Reply #17 - Nov 8^th, 2011 at 11:29pm	Print Post
	Seriously highjacked!! Dave


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JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: Constant Casting Tempreture Reply #18 - Nov 13^th, 2011 at 7:35pm	Print Post
	Dave yes it was and it was unfortunate that I had to pull it as the other 2000 plus members might have benefited from it. As of late this has been the mode of operation by a handful of members on this site and it would be nice to have the moderators bring it to an abrupt halt so that the other 2000 plus members could take advantage of someone else's hard work and dedication so they might being able to excel at a much faster rate by learning from those unselfish individuals that have done the multitude of time consuming experimentation's with a monetary cost attached to them yet are more than willing to share the updated knowledge from what they have learned along the way. J.Louis

	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Constant Casting Tempreture Reply #19 - Nov 13^th, 2011 at 8:06pm	Print Post
	JLouis wrote on Nov 13^th, 2011 at 7:35pm: Dave yes it was and it was unfortunate that I had to pull it as the other 2000 plus members might have benefited from it. As of late this has been the mode of operation by a handful of members on this site and it would be nice to have the moderators bring it to an abrupt halt so that the other 2000 plus members could take advantage of someone else's hard work and dedication so they might being able to excel at a much faster rate by learning from those unselfish individuals that have done the multitude of time consuming experimentation's with a monetary cost attached to them yet are more than willing to share the updated knowledge from what they have learned along the way. J.Louis John, dont mean to be nitpickin, but do you realize your last post is one huge sentence? I dont see a comma or period anywhere. Oh, I see a period. Glad you're back bub. Stand firm! Okay, so when we install our dimmer switches, how do we do it? How did you wire yours. Pictures would sure help us electrically challenged bullet casters. Thanks John for all the great stuff you do to advance our SS target shooters. Thanks man! Joe.

	A blind squirrel runs into a tree every once in a while.
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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Constant Casting Tempreture Reply #20 - Nov 13^th, 2011 at 8:11pm	Print Post
	Wait a minute. You didnt have to pull anything! You need to realize that not everyone is going to agree with you all the time. And that posters are going to have fun from time to time. Joe.

	A blind squirrel runs into a tree every once in a while.
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John Boy Ex Member	Re: Constant Casting Tempreture Reply #21 - Nov 13^th, 2011 at 8:43pm	Print Post
	My turn? I find casting easy: * Whether using an electric or cast iron 20# pots, with a dial thermometer can control the temperature at or within 10 degrees. With the digital and stainless steel probe, can hold the temperature within 2 degrees. BTW, when was the last time you calibrated your thermometer? Tel-Tru's have a 5/8" nut under the dial. Put the stem (above the bimetal band in a pot of boiling water and adjust the dial. * I don't cast over 750 degrees for any caliber, mold and alloy dependent. The key to filled out nice bullets with no frost is the mold/pot temperature when the sprue puddle frosts at 5 seconds for bullets 300grs & under ... 8 - 10 seconds for bullets over 300, up to 550grs * And yes, I weigh all my bullets keeping them within a 0.5gr variance ... constant sprue puddle time again is the key to small variances Example: Have the Mos 22 rf mold. The puddle frosted at 5 seconds with a temp of 710. Last batch of 200 weighed 46.4 to 46.8grs with 16 outside the range (Lost my rhythm. I had to fill and lite my pipe). The sprue puddle with 1:20 Hoch 322 205 frosts at 5 seconds with a temp of 730. The Hoch 322 200 at the same temperature with 1:20


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Constant Casting Tempreture Reply #22 - Nov 13^th, 2011 at 8:47pm	Print Post
	Same here John Boy. Very nice piece of writing by the way. Good composition. Only had to read it once. Didnt honk your own horn once! Joe.

	A blind squirrel runs into a tree every once in a while.
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John Boy Ex Member	Re: Constant Casting Tempreture Reply #23 - Nov 13^th, 2011 at 10:12pm	Print Post
	Quote: Didn't honk your own horn once! Thanks Joe. Do I get a free 'pass' the next time I screw up a post?


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Constant Casting Tempreture Reply #24 - Nov 13^th, 2011 at 10:33pm	Print Post
	Lots a free passes! Joe.

	A blind squirrel runs into a tree every once in a while.
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RoyB Oldtimer Offline Posts: 838 Location: Dartmouth, MA Joined: Mar 28^th, 2011	Re: Constant Casting Tempreture Reply #25 - Dec 1^st, 2011 at 8:13am	Print Post
	Anyone over here ever hear of a PID? (You need to *Login* or *Register* to view media files and links)

	Roy B Dartmouth, MA (You need to *Login* or *Register* to view media files and links)
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SSShooter Frequent Elocutionist Offline Posts: 2942 Location: Southern NJ Joined: Aug 1^st, 2010	Re: Constant Casting Tempreture Reply #26 - Dec 1^st, 2011 at 8:43am	Print Post
	Doggoneit, Joe. I was just about to offer a couple of old 'cow magnets' for lots of $$, plus shipping. Would not only improve his mileage but allow for better casting. Next thing you're going to try to convince us the world's round.

	Glenn - Stevens 044 1/2, Bartlein SS 5R barrel in 22LR
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UtahDave Senior Forum Member Offline Posts: 396 Location: Heber City, Utah Joined: Aug 14^th, 2010	Re: Constant Casting Tempreture Reply #27 - Dec 1^st, 2011 at 8:45am	Print Post
	Yep, they are common temperature controllers (or controllers for other variables as well). The link is a nice find and a good project for the winter. I think I will get a Waag pot and one of these. The gas fired burner is just a bit fiddley and I'm not willing to set up an electronic temperature controller for the gas flow. Any hints on where to buy a 20# or bigger Waag (or equal) at a good price? Dave


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digitall423 Oldtimer Offline Posts: 747 Location: Mexico Beach, FL Joined: Aug 5^th, 2005	Re: Constant Casting Tempreture Reply #28 - Dec 1^st, 2011 at 8:48am	Print Post
	Yes. I have one on a Lee 20 pound pot. They are quite easy to build and take all the guess work out of maintaining melt temperature. They use a type J thermocouple and a small PID controller that is self calibrating. PID means proportional, integral, and derivative. If I have the setpoint set to 700 degrees as the temperature is coming up it will overshoot a bit but when it levels out it will hold around 5 or 6 degrees of the setpoint. That's with dipping lead and returning the sprue to the pot each time. They work really great.


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digitall423 Oldtimer Offline Posts: 747 Location: Mexico Beach, FL Joined: Aug 5^th, 2005	Re: Constant Casting Tempreture Reply #29 - Dec 1^st, 2011 at 8:54am	Print Post
	Utah Dave. You don't need a PID with a Wagge pot. the thermostat on the Wagge pot actually works, unlike the other pots. The thermostst is adjustable. You must call Wagge and have them build you a lead pot to order. They do not have them on their website. I've never seen one for sale used.


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