Free 186 More Best Homemade Tools eBook:  
Get 2,000+ tool plans, full site access, and more.

User Tag List

Results 1 to 7 of 7

Thread: Spot welder

  1. #1
    Supporting Member darkoford's Avatar
    Join Date
    Jul 2017
    Location
    Croatia
    Posts
    100
    Thanks
    107
    Thanked 174 Times in 52 Posts

    darkoford's Tools

    Spot welder


    186 More Best Homemade Tools eBook

  2. The Following 5 Users Say Thank You to darkoford For This Useful Post:

    bruce.desertrat (May 9, 2022), Frank S (May 9, 2022), Jon (May 12, 2022), LMMasterMariner (May 16, 2022), nova_robotics (May 13, 2022)

  3. #2
    Supporting Member darkoford's Avatar
    Join Date
    Jul 2017
    Location
    Croatia
    Posts
    100
    Thanks
    107
    Thanked 174 Times in 52 Posts

    darkoford's Tools
    Is something wrong with this post?

    2000 Tool Plans

  4. #3
    Supporting Member Frank S's Avatar
    Join Date
    Aug 2015
    Location
    Peacock TX
    Posts
    11,178
    Thanks
    1,974
    Thanked 8,766 Times in 4,195 Posts

    Frank S's Tools
    I don't see anything wrong with it. I like the fact you used a much larger transformer to make your spot welder. The ones made with even a large microwave transformer are dismal in power. I even made one several years ago to determine if everyone's claims of the high amperage output was anywhere near real. It takes a lot of core weight to create a large enough magnetic field to achieve enough amps to do any good.
    Never try to tell me it can't be done
    When I have to paint I use KBS products

  5. The Following User Says Thank You to Frank S For This Useful Post:

    darkoford (May 9, 2022)

  6. #4
    Supporting Member bruce.desertrat's Avatar
    Join Date
    Nov 2017
    Posts
    785
    Thanks
    557
    Thanked 667 Times in 357 Posts

    bruce.desertrat's Tools
    Looking forward to the rest of the build!

  7. #5
    Supporting Member darkoford's Avatar
    Join Date
    Jul 2017
    Location
    Croatia
    Posts
    100
    Thanks
    107
    Thanked 174 Times in 52 Posts

    darkoford's Tools
    Quote Originally Posted by bruce.desertrat View Post
    Looking forward to the rest of the build!
    I can't regulate the current so I have to make an Arduino time limit in milliseconds. The plan is to make a double pulse for thinner sheets.
    I use the box from a faulty China inverter (Boxer) welder. I also use a welder inverter fan for cooling.

  8. #6
    Supporting Member darkoford's Avatar
    Join Date
    Jul 2017
    Location
    Croatia
    Posts
    100
    Thanks
    107
    Thanked 174 Times in 52 Posts

    darkoford's Tools
    Quote Originally Posted by Frank S View Post
    I don't see anything wrong with it. I like the fact you used a much larger transformer to make your spot welder. The ones made with even a large microwave transformer are dismal in power. I even made one several years ago to determine if everyone's claims of the high amperage output was anywhere near real. It takes a lot of core weight to create a large enough magnetic field to achieve enough amps to do any good.
    That the transformer must be far larger than the transformer of the microwave oven. Microwave transformer is good only for thin sheets or use several pieces of the same transformers.

  9. #7
    Supporting Member Frank S's Avatar
    Join Date
    Aug 2015
    Location
    Peacock TX
    Posts
    11,178
    Thanks
    1,974
    Thanked 8,766 Times in 4,195 Posts

    Frank S's Tools
    Darkford if you could get your hands on one of these you could regulate the output by moving part of the core in and out of the magnetic field area
    These are wleging machine transformers so obviously the secondaries have more turns than a spot welder and would have to be rewound for the higher amperages at lower voltages
    Spot welder-img_20220429_095013tfr.jpg
    Spot welder-img_20220429_095142tfr.jpg
    Current can also be controlled by winding the secondary winding with multiple smaller conductors. 2,4,6,8 in hand windings each winding still having the same number of turns, connected in parallel, to keep the output voltages in a similar range
    Spot welder-img_20220509_120306mw.jpg



    186 More Best Homemade Tools eBook
    Never try to tell me it can't be done
    When I have to paint I use KBS products

  10. The Following User Says Thank You to Frank S For This Useful Post:

    darkoford (May 10, 2022)

Thread Information

Users Browsing this Thread

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

Bookmarks

Posting Permissions

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