Background:
I scavenged a 1100W transformer from a discarded microwave with the intention of making a stick welder (for fun and perhaps minor repairs, nothing I would trust anyone's safety to).
I cut the welds on the transformer, removed the secondary (and primary in the process because it was in the way), replaced the primary just as it was, and created a new secondary by winding what I assume was 10 or 8 AWG wire (from a cheap set of jumper cables), and wound it 8 times around the transformer. I then resealed the transformer with silicone adhesive.
Questions:
I don't have any pictures right now since I'm at work, but can take some when I get home and post them if you think they may be of any help.
Thank you for reading!
I scavenged a 1100W transformer from a discarded microwave with the intention of making a stick welder (for fun and perhaps minor repairs, nothing I would trust anyone's safety to).
I cut the welds on the transformer, removed the secondary (and primary in the process because it was in the way), replaced the primary just as it was, and created a new secondary by winding what I assume was 10 or 8 AWG wire (from a cheap set of jumper cables), and wound it 8 times around the transformer. I then resealed the transformer with silicone adhesive.
Questions:
- I plugged in the transformer, and used my multimeter to take a voltage reading on the leads coming from the secondary. I got a reading of 9.5V. Can I then assume that the transformer is outputting approximately 116A (1100W transformer divided by 9.5V)? Or would I only be able to measure the current by buying/using a clamp meter?
- I am using a welding ground clamp and 400A electrode holder, which are wired to the leads coming from the secondary coil, and am unable to produce an arc with 3/32 6011 electrodes, on the thin metal that was once the cover of the microwave I scavenged the transformer from (I am able to get a spark by pecking and scraping the metal, but no arc). Does anyone know what the issue could be? I realize this isn't a welding forum, but just curious if anyone would know. I may be able to find the answer myself if someone could possibly answer question #1 for me.
- A majority of the tutorials I have viewed on turning a microwave oven transformer into an arc welder have used anywhere from 2-6 transformers, while a certain few have used only 1 and achieved success. What benefits, if any, would you get from using more than 1 transformer? A better/longer duty cycle since the work/heat would be spread over more than one transformer? Or were multiple used perhaps because of the tight space needed to wind the secondary coil with a thicker gauge wire, and not being able to get as many turns as desired?
I don't have any pictures right now since I'm at work, but can take some when I get home and post them if you think they may be of any help.
Thank you for reading!