DIY Spot Welder from Microwave Transformer: How to Make One!

Maintenance and Repairs
21

Can someone explain the wiring configurations in more detail? I want to make sure I do it safely.

22

When wiring, connect the primary side to your power supply (with a switch!), and the secondary will output the welding current. Check polarity too!

23

Sounds pretty straightforward! What kind of current are we talking about for spot welding?

24

You’re looking at around 1000-3000 amps. It sounds daunting but as long as you’re careful with your connections, you’ll be fine!

1 Like
25

I’m really impressed with the creativity here! Does anyone know if there are safety regulations we should keep in mind?

26

Good question! Check local laws regarding DIY welding equipment. General safety rules apply, such as proper ventilation and protective gear.

27

Are there any materials we should avoid welding with this setup?

28

Definitely avoid aluminum and any metal that might be coated with paint. These can create dangerous fumes!

29

I’m loving the ideas in this thread! Can we reuse parts from other microwaves too?

30

Absolutely! Just make sure the transformers are similar in rating and type for compatibility.

31

Just remember, safety first! Dismantling microwaves can be hazardous if you’re not careful. Use the tutorial wisely!

5 Likes
32

For sure! It’s always good to reflect on our safety practices. Share your progress with the community!

33

Great tutorial! When testing your spot welder, start with thinner materials like sheet metal. If it doesn’t weld well, try adjusting the secondary winding settings on the transformer.

34

That’s really helpful! Can you share some specific thicknesses of materials that work best for beginners?

5 Likes
35

For beginners, I recommend starting with 20-22 gauge steel. Adjusting the time and pressure is key to getting a solid weld.

1 Like
36

Thanks for the recommendation! How do you determine the right pressure to use?

5 Likes
37

Testing different pressures on scrap material can help determine what’s best. Typically, more pressure works better for thicker materials, while lighter pressure suits thin sheets.

38

Has anyone had issues with overheating during tests? I’m curious if others have solutions to manage that.

5 Likes
39

Overheating can happen if the weld time is too long. Make sure to start with shorter weld durations and increase gradually!

40

That makes sense! What’s the typical range for weld times?