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what kind of heating element do i need?

Discussion in 'General Questions' started by gunsmoke132, Feb 22, 2017.

  1. gunsmoke132

    gunsmoke132 Member

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    long stort short the heating element died and idk if i need a 12 or 24 volt heating element
     
    #1 gunsmoke132, Feb 22, 2017
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    12v, 130w (although you could probably live with 150w max)
     
    #2 mark tomlinson, Feb 22, 2017
  3. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    12 v 25 w minimum if you are speaking of the hotend cartridge heating element.
     
    #3 WheresWaldo, Feb 22, 2017
  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Yes. That was referring to the bed heater. To be clear

    Sent from my BNTV450 using Tapatalk
     
    #4 mark tomlinson, Feb 22, 2017
  5. gunsmoke132

    gunsmoke132 Member

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    oh i meant hotend my bed got replaced a long time ago. can i get away with 24v?
     
    #5 gunsmoke132, Feb 23, 2017
  6. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    You could, it will just heat very slowly.
     
    #6 WheresWaldo, Feb 23, 2017
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  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    The hotend uses 12v heater cores. You don't want to swap in a 24v heater core because it will not work very well :)
     
    #7 mark tomlinson, Feb 23, 2017
  8. Skullduggery

    Skullduggery New Member

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    Is there a place to get replacement cartage heaters and thermistors?
     
    #8 Skullduggery, Mar 8, 2018
  9. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    US = Amazon*, PrintedSolid.com
    Everywhere else = China

    * Please note that Amazon sells the exact same parts from the exact same country of origin as direct from China.
     
    #9 WheresWaldo, Mar 9, 2018
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  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    One added advantage to Amazon is that if you buy via a Prime seller then you are getting a warranty that Amazon is quick to enforce :)
    Not happy? Send it back.
     
    #10 mark tomlinson, Mar 9, 2018
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  11. BrooklynBay

    BrooklynBay Active Member

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    I've seen 12 volt elements with 30 watts, 40 watts, and 50 watts being sold. A 24 volt element could be used if you want to use a solid state controller with a separate 24 volt power supply, but I don't think that it will be worth the extra expense unless you could find one with a higher wattage than 50 watts.
     
    #11 BrooklynBay, Apr 8, 2018
  12. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    The only difference between one rated at 12v and another rated at 24v is the overall resistance of the cartridge. They are in effect interchangeable and there is no need for additional circuitry. If you are using what a vendor claims is a 24v heater cartridge and are only running 12v though it just adjust the wattage value in your head.

    @BrooklynBay please don't make things more complicated than they are with misinformation.
     
    #12 WheresWaldo, Apr 8, 2018
  13. BrooklynBay

    BrooklynBay Active Member

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    So how would you calculate the difference in wattage between a 12 volt & 24 volt element which is rated at 40 watts? Volts X Amps = Watts. I would assume that the 24 volt element would take longer to reach the same temperature if it's running at 12 volts.
     
    #13 BrooklynBay, Apr 8, 2018
  14. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    @BrooklynBay Although the relationship at the two specified voltages seems like it should just be 2 to 1 and for the sake of our discussion it is, heater cartridges do not exhibit a constant resistive load as temperature increases. Nevertheless, for the most part heater cartridges are a purely resistive load and the fact of how they are manufactured means there really aren't any 12v vs 24v cartridges at the lowest end used in 3D printers. You can use the following formulas if you want to calculate it for yourself.
    • V = I*R
    • I = V/R
    • P = I^2 * R = V^2 / R
    ideally since there can be 10% or more deviation in resistance readings between a cold cartridge and a hot cartridge you want to measure it when it is powered and heated, not entirely necessary for our discussion but more accurate.
     
    #14 WheresWaldo, Apr 8, 2018
  15. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    I have run the 40w in all my FDM printers. No problems there. Heats much faster.
     
    #15 mark tomlinson, Apr 8, 2018
  16. BrooklynBay

    BrooklynBay Active Member

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    #16 BrooklynBay, Apr 19, 2018

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