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Old 27th August 2012, 07:43 PM   #281
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yes , tomorrow i will fix the drill into my big table.
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Old 27th August 2012, 08:00 PM   #282
ISTPYRO is offline ISTPYRO  Portugal
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Okay. But this will be the first time that you will wind the bobbin using the drill? Or you have done before? It is practical?

That's a good idea!
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Old 27th August 2012, 08:13 PM   #283
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with the drill this is my first winding. but i already done before with manual machine.
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Old 27th August 2012, 08:39 PM   #284
ISTPYRO is offline ISTPYRO  Portugal
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Okay. Good luck with that! If possible, try to make a movie.

Regards.
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Old 28th August 2012, 12:35 AM   #285
AJT is offline AJT  Philippines
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Quote:
Originally Posted by nazirdigi View Post
hi tony,
i made the bobbin with pcb board.
the problem is i cant wind the wire with straight.
the wire is very thick and i burn the wire with lighter, the enamel is not removing. i think this is good quality wire.
any method for winding this wires?

i will post images when my camera return from my friend.
what i do in cases where thick wires is used is i lay them out straight on the ground and remove the kinks if any before winding them onto the bobbin....

nice bobbins and mandrel you have there btw....

now after winding the coils you can use rubber or wooden mallets to compress the coils.....do not pund on the coils directly but use a small wooden planck about 1/2 inch thick.....do not remove the coils from the mandrel while you are doing this.....

Click the image to open in full size.
Click the image to open in full size.

another way is to use a table vise:

Click the image to open in full size.


removing enamels off the wire ends, i use the flat side of the box cutter's knife....
Click the image to open in full size.

have someone beside you always to assist you.....when i built my biggest traffo, there were three of us, two brother in laws assisted me....
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Old 28th August 2012, 12:37 AM   #286
AJT is offline AJT  Philippines
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Quote:
Originally Posted by Junie View Post
Sir Tony,

I already dismantle one of the trafo i have, the bobbin size is 51mm x 42mm. I sent you PM for my requirements. I found this site interesting Practical Transformer Winding, what do you think of it?
Junie, do not re-use the magnet wire, scrap them and get fresh wires....
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Old 28th August 2012, 01:39 AM   #287
AJT is offline AJT  Philippines
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Quote:
Originally Posted by nazirdigi View Post
i tried with this jig.
the bobbin size is 1.75 inch centerleg, core stack 4.5 inch. i made with pcb board.
a couple of suggestion please.....the mandrel should sit in the full traverse width of the bobbins.....you can drill holes on the side of cover plate to thread in the wires...
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Old 28th August 2012, 04:07 AM   #288
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thanks tony for the reply, i will try ur method.
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Old 28th August 2012, 09:36 AM   #289
AndrewT is offline AndrewT  Scotland
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Yes, the wire must be straight before it reaches the winding bobbin.
Tensioning through a wire straightener or as Tony suggests, long lays of straight wire on the floor going out the door and through the garden.
The wire must be straight, the wire must be tensioned.
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Old 31st August 2012, 02:45 PM   #290
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hi tony,
i cant wind with 13gage wire for my transformer, its very thick and cant wind straight.

pls tell me, for a 1200watts transformer(primary 235v ac, 60-30-0-30-60ac secondary), can easy to wind with 15awg or 16awg wire for secondary and primary gage,
lamination cl 1.75inch.
how many core stack need?
les heat.
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