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Thread: rex-c100 settings help

  1. #1
    Boolit Master Forrest r's Avatar
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    rex-c100 settings help

    I finely got time to get a rex-c100 pid setup to use for casting and pc'ing. Before I ventured into the setting (sl1/sl2/etc) I figured I'd ask here and see what others are using for settings.

    Can someone help me with the setup that they are using with their rex-c100 to cast bullets with?

  2. #2
    Boolit Master bbogue1's Avatar
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    I use 2 Rex C100's. I, too, have thought about fiddling with the advanced settings and quickly realized I did not have enough information to make an educated customized program. Then I realized the PID was doing it's job with the factory settings. So, until I find a grievous error I will assume the engineers who made the default settings knew more than I about he operation of the PID and I would let it do it's thing while I enjoyed casting and PCing. After all that is what I got it for.
    When melting clip on wheel weights I set the SV at 371 C which is in the middle between the melting points of lead (327C) and zinc (419C). My Pid heats the alloy up to 322 and holds it steady there (the 5 degree difference is to guard against over temp cycling). After a while it learns and moves the temp up a little closer to 371. The Rex C100 comes with the autotune turned on.
    For casting I set the SV at 371C and let the pot and the PID work hand in hand to maintain the temp.
    When I am PCing I set the SV at 204C (400 degrees F) although I watch the bullets and when the powder coat gets shiny I give it about 30 seconds to a minute more and remove the bullets from the oven.
    Using that strategy it makes my life easier and I haven't screwed up the settings.
    Some how in fooling around with the settings I ruined my first PID. The lights and numbers came on but it didn't work. I could set the SV but the PV always read 981 even when the thermocouple was in air where it should have read about 20. I even got a HHHH setting when I turned it on and that setting is not listed anywhere. I ended up replacing it after a month of back and forth ebay messages with the seller.

    That said do you know what model PID you have and what the default settings are? Do you know how to set the SV? Do you know what the PV is showing you?
    Last edited by bbogue1; 01-18-2018 at 08:36 AM.
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  3. #3
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    Mike W1's Avatar
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    Here's a little cheat sheet I made for mine that may be of some help to you. All you really need to do is set the desired temperature (SV), turn the power on, and when the PV is around 20-30° below that push the AT button. It will flash while it's autotuning and turns off automatically when it has finished. They usually come set to read values from a K type probe so I suppose if you're having some problem you might want to check that setting. I am assuming you have the SSR output and not the relay output model. And BTW, there does seem to some differences in codes for the LCK settings between the various models too.

    PV = Process Value SV = Set Value
    Buttons - SET, RS or Shift Digits Key ◄
    ▲ = Raise the value ▼ = Lower the value
    __________________________________
    INITIAL POWER ON SCREENS
    InP shows in PV screen first
    °C K shows in SV screen
    then goes to 400 in PV screen
    and 0 in SV screen
    then room temp in PV
    and the set value in SV screen
    If the TC isn't hooked up it flashes FOUR
    Zeros in the PV screen
    _________________________________________
    To Set Desired Temperature
    Press SET button
    Press ◄ Button to select digits
    When done selecting Press SET
    _______________________________
    TO AUTOTUNE UNIT
    Press & Hold SET button till AL1 shows
    Press SET to sequence to ATU
    Change 0 to 1
    Press SET
    AT lamp will flash until autotune is completed
    ______________________________________________


    To enter 1st Parameters
    Press and Hold SET
    LCK = 0
    FACT MINE
    AL1
    ATU 0 0
    P 30 30
    I 240 240
    D 60 60
    Ar 25 25 (Note 2)
    T 20 20
    SC 0 -001 for offsetting TC error
    LCK 0 0

    1. Inst. Sheet showed OH following T - not in my PID!
    Also showed AL2 but not in my PID either.

    2. {Ar was 13 top pot, 38 lower pot} Some
    manuals show factory set of 25 & some 100. It needs
    some value or will shut off the I function and apparently
    will change with PID action of some sort.}
    To exit 1st Parameters Hold down SET
    ______________________________

    To enter 2nd set of Parameters
    Set LCK to 1000
    Hold SET & SHIFT KEY ◄ till COD= 0 appears
    Use SET to scroll
    COD 0
    SL1 0 K type TC
    SL2 1 Celsius (no luck changing to F)
    SL3 0
    SL4 1
    SL5 0
    SL6 1 (inverse operation, heating)
    SL7 0
    SL8 0
    SL9 0
    SL10 1
    SL11 0
    _____________________________________________

    To enter 3rd set of parameters
    When COD = 1 use SET to select
    SLH 0 Note 3
    SLL 0
    oH 2
    AH1 2
    dF 1
    To Exit Parameters Hold SET and SHIFT KEY down
    (no decimal place set on mine after SLL)

    3. SLH value can be changed to let unit read a higher value.
    Set mine at 450°C (842° F)

    LOCK Settings (varies in different manuals)
    0000 All can be modified
    0001 Data can't be modified, except SV, AL1, AL2
    0011 Data can't be modified, except SV
    0111 Nothing can be modified

    0100 No Data Locked
    0101 Set data locked (All Parameters
    changeable)
    0110 SV changeable, set data locked

    0100 Nothing Locked
    0101 Set data locked
    0110 All parameters locked except SV

    0000 Any setting other than 0000 cannot
    enter the initial set mode.
    If set to initial set mode all outputs
    are turned OFF
    If controller exits from initial set mode,
    confirm that that LCK setting is set to
    0100
    Mike

    Benefactor Member NRA
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    US Army Vet

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  4. #4
    Boolit Master Forrest r's Avatar
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    WOW!!!
    Thank you, that's just what I was looking for.

  5. #5
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    HATCH's Avatar
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    I would just run the autotune feature and let it set the settings

  6. #6
    Boolit Master Forrest r's Avatar
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    Mike,
    Thank you for your help. I finely got time to do some casting today. I went over the setting before I used the pid. Everything looked good and the pid did an excellent job/it rained quality bullets for around 4 hours.

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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