Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Cheap Toaster oven or Skillet?

  1. #1

    Cheap Toaster oven or Skillet?

    I am thinking about trying out using a stencil on one of my boards, so I ordered one from OSH stencil,

    Now wondering what is the easiest approach. I have seen some say Toaster oven others say Skillet.

    So just wondering.

    Also what paste do you recommend?

    Up on PJRC one suggested: http://www.digikey.com/product-detai...1AX-ND/1160002

    Thanks

  2. #2
    Join Date
    Sep 2010
    Location
    ಠ_ಠ
    Posts
    2,282
    Images
    27
    Rep Power
    275

    Re: Cheap Toaster oven or Skillet?

    If you go with the low-temp tin-bismuth blend I mentioned a while back (I think it was in the YETIS thread), then you don't need anything except a low power heat gun like the sparkfun heaterizer. I've yet to try any oven method, but I have killed several boards with a skillet/hotplate because I did not have temperature control. Not only did the silkscreen darken before the solder paste melted, but the boards warped and then oozed a horrific black sludge that was earlier the adhesive holding the laminate together. A convection oven is probably the best choice since the forced airflow will help compared to just natural convection as in a plain toaster oven, and there are temperature control conversion kits for both oven types.
    Please pardon the pedantry... and the profanity... and the convoluted speech pattern...
    "You have failed me, Brain!"
    bleh

  3. #3

    Re: Cheap Toaster oven or Skillet?

    I've successfully used toaster ovens with a temperature gauge.
    I have managed to reflow a board on an aluminum plate in a skillet on a gas range, but the alignment was so bad so I couldn't test whether the CPU survived.
    I vastly prefer steel stencils over mylar stencils. They cost a little more, but not much more (if you get them from Seeed or similar)

  4. #4
    Join Date
    Sep 2010
    Location
    ಠ_ಠ
    Posts
    2,282
    Images
    27
    Rep Power
    275

    Re: Cheap Toaster oven or Skillet?

    oshstencils now offers 4mil stainless steel in addition to the regular 3mil and 5mil kapton.
    Please pardon the pedantry... and the profanity... and the convoluted speech pattern...
    "You have failed me, Brain!"
    bleh

  5. #5

    Re: Cheap Toaster oven or Skillet?

    Thanks,

    For my first attempt I ordered the kapton, and I expect it to be a build 1 or 2 boards only.

    Toaster oven: Temperature control. Did you use the temp control in the oven example: https://www.amazon.com/Decker-TO1313...s=toaster+oven
    And simply set a temp for it?

    Or Would you suggest I try doing it using the rework station: https://www.sparkfun.com/products/10706
    So far I have not had much luck undoing stuff from boards with it, but I have not tried much either.

    Will search through the YETIS thread.

    Thanks again

  6. #6
    Join Date
    Sep 2010
    Location
    ಠ_ಠ
    Posts
    2,282
    Images
    27
    Rep Power
    275

    Re: Cheap Toaster oven or Skillet?

    ChipQuik SMDLTLFP Solder Paste No-Clean Sn42/Bi57.6/Ag0.4
    Received my little jar from digikey in an aluminized bubble wrap bag with a 'colder than ice' pack, and what's left is sitting in the back of the fridge in a small glass tupperware container with a mulit-snap/tab/lever lid.

    If you use the low temp stuff, then the rework station would be fine as I just used the heaterizer which provided plenty of heat to do repeated/sustained reflow without damaging the PCB. If using 'normal' paste (leaded or lead-free), then a cheap toaster oven would probably be the better choice. If you don't line up the stencil well with the PCB, use <0.8mm pitch components, and/or use overly large paste cutouts on large exposed pads, then you will likely have to do a bit of reflow anyway.
    Please pardon the pedantry... and the profanity... and the convoluted speech pattern...
    "You have failed me, Brain!"
    bleh

  7. #7

    Re: Cheap Toaster oven or Skillet?

    Did you use the temp control in the oven example
    I actually used a relay with temp sensor made for this purpose. It had a timer with a minute or two of "soak" before peaking and then cooling.

  8. #8
    Join Date
    Mar 2015
    Location
    Texas
    Posts
    342
    Images
    15
    Rep Power
    32

    Re: Cheap Toaster oven or Skillet?

    While not completely satisfied with the performance of my cheap oven it does get the job done for this sort of thing.. It's been modified a with a Zallus reflow controller but they don't seem to be available anymore. Probably cheaper ways of going about it if you wanna DIY but this was a convenient kit at the time.

    I have limited knowledge on what paste works best but so far I haven't had any issues with this type that I keep stored in the fridge. https://www.amazon.com/MG-Chemicals-.../dp/B00TIC895Y
    01001001001000000100110001101111011101100110010100 10000001010010011011110110001001101111011101000111 0011

    My Instagram
    My YouTube

  9. #9

    Re: Cheap Toaster oven or Skillet?

    Also: The reason I like stainless is that the paste goes on so easily, even if I only make one :-)
    There's much less smudge than I had with Kapton.
    Any paste ought to work, and if you use leaded (in the US) then it will melt more easily than lead free, and all components these days are made to tolerate lead free solder temperature, so leaded makes for a nice safety margin.

  10. #10
    Join Date
    Sep 2010
    Location
    ಠ_ಠ
    Posts
    2,282
    Images
    27
    Rep Power
    275

    Re: Cheap Toaster oven or Skillet?

    One really important thing to remember about leaded solders is that they flow much more readily, so they result in far more solder bridges than most lead-free solders when used with really fine pitch components. Part of the reason for the explosion in increasingly fine pitch components is because RoHS compliance required a shift away from the lead that limited the minimum pitch one could actually use while maintaining a decent yield of fully functional assembled boards. Tin whiskers are pretty much the only really big downside to lead-free solders since they can even penetrate conformal coatings, but most modern lead-free blends do not seem to have many issues other than those caused by an improper reflow profile.

    The tin-bismuth-silver blend has an even larger safety margin with a melting point of 138[C]/281[F].
    Please pardon the pedantry... and the profanity... and the convoluted speech pattern...
    "You have failed me, Brain!"
    bleh

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Cheap Simulacra
    By defwheezer in forum Project Showcase
    Replies: 2
    Last Post: 06-15-2010, 12:09 PM
  2. Looking for a cheap solution?
    By Borg in forum Mech Warfare
    Replies: 8
    Last Post: 06-09-2010, 09:55 AM
  3. Cheap humanoid
    By xx2747 in forum Project Showcase
    Replies: 58
    Last Post: 01-29-2010, 08:09 PM
  4. Question(s) Best platform for oven controller
    By broadband155 in forum Arbotix, Microcontrollers, Arduino
    Replies: 18
    Last Post: 04-26-2009, 08:48 AM
  5. Oven reflow controller
    By librab103 in forum Off Topic
    Replies: 5
    Last Post: 08-22-2008, 01:36 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •