1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

  2. Week 25 of the BladeForums.com Year of Giveaways is live! Enter to win a Spyderco Manix 2

    Click here to enter the drawing for your chance to win a Spyderco Manix 2 , Bladeforums.com swag or memberships!
    Be sure to read the rules before entering, and help us decide next week's giveaway by hitting the poll in that thread!

    Entries will close at 11:59PM Saturday, June 22 ; winners will be drawn on Sunday @ 5pm on our Youtube Channel: TheRealBladeForums. Bonus prizes will be given during the livestream!


    Questions? Comments? Post in the discussion thread here

Oven elements not coming on

Discussion in 'Shop Talk - BladeSmith Questions and Answers' started by John mc c, Mar 25, 2019.

  1. John mc c

    John mc c

    241
    Aug 23, 2018
    Hey guys
    My new diy oven was working fine until today altho I've only been checking it's accurate since i got it going
    1200 stress relief for 2 hours no problem then 1650 of normalizing,it's highest temp yet,was good then elements stopped working,controller is good and reading a descending temp but elements aren't coming on now to go to 1500
    I don't see any breaks in elements looking in but its still too hot to have good look,maybe a break in them coming through fire brick or behind it
    Any ideas?
     
  2. John mc c

    John mc c

    241
    Aug 23, 2018
    I see prob now it's cooled
    Where burnt out where it joined brass connector.maybe that wire was pulled tight
    I'l just rejoin
     
  3. Natlek

    Natlek

    Jun 9, 2015
    Did you twisted wire at the end ?
     
  4. John mc c

    John mc c

    241
    Aug 23, 2018
    No natlek and now I know I should have.too hot
    The element wire is too short now to do it
    Can I unbend some element now and push it through fire brick or are elements too brittle now after being used?
    I've only used them for 3 or 4 hours
     
  5. Natlek

    Natlek

    Jun 9, 2015
    You can try to unbend one coil ,that is all length you need to fix it .
    If you have piece of unused kanthal wire , twist one piece and try to connect with simple wrap with HT coil you already have in oven .....all you need is to increase resistance so wire can t get too hot in that place but now you know that :)
     
  6. John mc c

    John mc c

    241
    Aug 23, 2018
    I'l get more wire I'll need it again anyway
    A mistake I won' make again
    Thanks natlek
     
  7. Stacy E. Apelt - Bladesmith

    Stacy E. Apelt - Bladesmith ilmarinen - MODERATOR Moderator Knifemaker / Craftsman / Service Provider

    Aug 20, 2004
    Brass connector??? Brass melts at barely over 1500F. Use stainless steel bolts.
     
  8. John mc c

    John mc c

    241
    Aug 23, 2018
    Thanks Stacy
    That's what I get for blindly following online tutorials
    Tho in fairness that guy bent over ends few times like natlek said that keeps temps down but still better to use stainless bolts
     
  9. scott kozub

    scott kozub Gold Member Gold Member

    239
    Jan 1, 2018
    I used those connectors from the inside of a Mar connectors. With the wire twisted I have had no issues. Nice thing about what Stacy suggested is that you can make the bolt fit snug to the hole in the fire brick. If i ever replace the coils ill make that change. You want as little heat as possible leaking into you control assembly.

    Be careful as the wire is quite brittle after heating
     
  10. Justin King

    Justin King

    Nov 8, 2009
    Use a torch to heat the coil before you straighten it, it's not brittle at red heat.
    I had this same issue with my home built oven, when I rebuilt it I used the twisted double strand at the terminals and even moved the element connection to sit outside the oven itself. I originally used stainless tubes to make a crimp connection with the elements but this also failed, I now have a ceramic terminal block.
     
  11. Stacy E. Apelt - Bladesmith

    Stacy E. Apelt - Bladesmith ilmarinen - MODERATOR Moderator Knifemaker / Craftsman / Service Provider

    Aug 20, 2004
    Justin has the best advice:
    Twist the ends and run them out the back of the oven. Use a ceramic terminal block to connect them to the power leads. You can stuff some kao-wool in the hole through the brick if it gets oversize, but it should only be as large as the wires.

    BTW, always make a cover box over the wire connections on the back. You wouldn't believe how many home made ovens have the connection exposed on the back :eek:
     
  12. John mc c

    John mc c

    241
    Aug 23, 2018
    Thermal block it is thanks guys
    I pulled out a pin I made in kanthal wire and it seemed bendy enough still but I'll heat it to be sure
     

Share This Page