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high amp transformer

 
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xlchainsaw
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PostPosted: Wed Jul 12, 2017 12:02 am    Post subject: high amp transformer  Reply with quote


Link


with all credit to grant thompson .KING OF RANDOM

inspired by this vid and used as reference i decided to GIVE IT A GO !

the end goal is a spot welder ...theo here also was inspired and built his ....based on the vid .
firstly i had to source a scrap microwave ....done !



at first i followed other " instructables" and tried removeing the secondry coil bit by bit ..

it went nowhere  Sad the expoxy used had set like concrete !!
so i looked up the above vid and decided to pull the transformer apart .

it wasnt easy to pry the primary off as the vid suggests ! a hour of careful packing and prying finally removed the primary ....

as far as the secondry went ....not as easy as grant shows  Laughing

i had to cut it and chisel it off with FORCE ! bit by bit !




my conclusion about removing the coils .

epoxy is used to set things in place .....depending on use and how warm the transformer gets from use in the micro ......the expoxy sets accordingly !!!

so a never used transformer from a micro might come apart very easily ??????

but this one .....gosh it was stuck fast !

next was to source some heavy cable .

to be continued  Very Happy
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xlchainsaw
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PostPosted: Wed Jul 12, 2017 12:35 am    Post subject: Reply with quote

thick cable ....this subject just about trashed my project ..i have no idea what theo used or where he got it from .????

grant shows in his vid that too small a cable will melt !!.....that ruled out my thin JUMPER CABLES !.....but i considered giving it a go ???

researched WELDER CABLE !!  hmmmm?? totally available

i went to the welder shop !! had a look at the cable ......very thick insulation ....little copper wire ....but the specs say its insulated for EMF !! ( electro magnetic force ) ...transformers work on EMF ! IM totally unsure if this cable is suited ???

so i went to a auto store ..they sell 750 amp battery cables in various lengths ....the longest being 700 mm for $ 31 each .

i had to think on this ??? i roughly estimated i needed a METRE !
i junked a battery box i bought years ago but kept the leads and clamps ...

the red lead is cactus the insulation has broken down .



but its sister lead was black rubber and in perfect condition ....andonce removed from the clamp was 700 mm ....the same as the auto store ....

so im going to give it a go ...





today i hope to test it ...wil it work ???? be okay ????........dunno !!! Laughing
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admin
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PostPosted: Wed Jul 12, 2017 1:22 am    Post subject: Reply with quote

Interesting Glenn, just be very very careful, those things can be lethal mate
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xlchainsaw
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PostPosted: Wed Jul 12, 2017 8:24 am    Post subject: Reply with quote

did it work ???

it sure did .....melted a standard 50 mm nail in approx 8 seconds ....i counted to 8

next job is to secure it properly in it own box with two outlet posts ...and source some more micros ...i intend to build the "pincers " as a seperate unit ....ive had the plans in my popular mechanics books ...published 1956/7 owned since 1978 ...
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xlchainsaw
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PostPosted: Fri Jul 14, 2017 9:11 am    Post subject: Reply with quote

a short delay with progress on this project has paid dividends .my son has sourced 2 metres of shop soiled cable at his work place .
the perks of having a son working as a welder supply salesman ....his workplace buys cable by the 100 metre roll and sells it on by the metre .

will 50mm welder cable sork with its emf coating ???

i cant find any info on the net in regards to welder cable ??

the chances of obtaining more discarded microwave oven tomorrow is very great .( if the " micro robbers "dont beat me )  Very Happy

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