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Thread: Project - PID on Lee Pro 4 20 furnace

  1. #761
    Boolit Mold
    Join Date
    Sep 2012
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    1
    Thanks to all for all the info,, got mine up and running, all good.

  2. #762
    Boolit Buddy pcmacd's Avatar
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    Escapee from The People's Republik of Kalifornia - Now in AZ, "Where Free Men Live!"
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    The LEE pots I've seen don't have a rheostat.

    A rheostat to handle that current would be as big as the lead pot itself.

    These pots have thermostats that, from the ones I've seen, measure the temperature outside the pot inside a vertical aluminum extrusion, right outside the pot.

    A lead thermometer is an absolute must with these machines.

    ~~~~~
    I've recently bought a Magma Engineering Cast Master with a PID temp controller.

    A 90# pot. These are mostly used to reduce scrap to ingots, but I got a one hole sprue on it to just cast bullets w/o having to wait an hour to continue my casting when I run out of lead.

    It cost me $600 to have the 240v line run to my bench; it was worth ever penny.

    You can put your thermometer into off site storage with this machine.
    Kalifornia passes "feel good" legislation hand over fist, legislation that is looking for a problem to solve and affecting only law abiding persons.

    So, after 40 years of that nonsense, that's why I now live in Arizona.

  3. #763
    Boolit Buddy pcmacd's Avatar
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    Quote Originally Posted by HATCH View Post
    Nice pictures.

    I would disconnect the lee controls totally.
    Also for mounting your probe, its easy.
    I used solid 14ga wire. I stripped it down to the metal only and wrapped it around the probe.
    I then used a crimp ring connector for mounting




    the PID is $45 shipped
    Probe is about $12 from ebay seller

    The Lee pot has a 700 watt element. (700/120 = 5.83 amps)
    You can use a 10 amp SSR and be just fine.

    I am in the proccess of building one for a member on here.
    I will take pictures of it once its completed.
    It doesn't require taking your pot apart. Basically you just plug your pot into it, plug it in the wall, and hook up the probe.
    So, can you give us a reference to the box you used to contain this?

    I'm needing to make a PID for my smoker, and this looks like a good solution.
    Kalifornia passes "feel good" legislation hand over fist, legislation that is looking for a problem to solve and affecting only law abiding persons.

    So, after 40 years of that nonsense, that's why I now live in Arizona.

  4. #764
    Boolit Master
    Mal Paso's Avatar
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    Jun 2010
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    Carmel, Ca
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    4,121
    Quote Originally Posted by pcmacd View Post
    The LEE pots I've seen don't have a rheostat.

    A rheostat to handle that current would be as big as the lead pot itself.

    These pots have thermostats that, from the ones I've seen, measure the temperature outside the pot inside a vertical aluminum extrusion, right outside the pot.
    Lee does not use thermostats. They use an infinity control like an electric range. A heater built into a bimetal switch causes the contacts to open turning off the electricity a percentage of the time. A bias screw changes the amount of off time. The heat from the pot will slow the cooling of the bimetal switch increasing off time a little but not enough to call it a thermostat. That's why PID makes a huge difference on a Lee.
    Mal

    Mal Paso means Bad Pass, just so you know.

  5. #765
    Boolit Buddy pcmacd's Avatar
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    Well, sir, I just replaced the temp control in my Lee 10# pot - it looks just like every other bimetallic tstat I've ever seen, and I've seen dozens.
    Kalifornia passes "feel good" legislation hand over fist, legislation that is looking for a problem to solve and affecting only law abiding persons.

    So, after 40 years of that nonsense, that's why I now live in Arizona.

  6. #766
    Boolit Master

    Join Date
    Feb 2006
    Location
    WNY
    Posts
    1,519
    I've built one of Hatch's PID kits about ten years ago, it's been running my 20# Lee pot ever since. Works great! All you guys that aren't running a PID don't know what you're missing!
    "We take a thousand moments for granted thinking there will be a thousand more to come. Each day, each breath, each beat of your heart is a gift. Live with love & joy, tomorrow is not promised to anyone......"

    unknown

  7. #767
    Boolit Master Retumbo's Avatar
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    Nov 2014
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    Ontario
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    743
    Well here is my attempt


  8. #768
    Boolit Bub kentfielddude's Avatar
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    Dec 2022
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    San Francisco & San Diego
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    54
    Has anyone tried the XMT-7100 PID?
    https://www.aliexpress.us/item/22518...hannel=twinner

    You can get a cheap enclosure for it:
    https://www.aliexpress.us/item/32568...d=KwUywatZkOGg

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check