SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old Jan 06, 2004, 01:49 PM
Faroe Islands/Germany
epilot's Avatar
Joined Nov 2000
5,983 Posts
Candle wax "bobbins"

Here is a picture of a candle I just turned in my lathe. It is for winding coils with a 5mm center hole. After the coil is wound, add a drop of CA to set the coil, then put in boiling water to melt the wax. You don't need a lathe, just get some candles that are thin enough to chuck in a drill.

Michael
epilot is offline Find More Posts by epilot
Reply With Quote
Sign up now
to remove ads between posts
Old Jan 06, 2004, 02:13 PM
Thats NOT indestructible
j8m8l's Avatar
London UK
Joined Apr 2002
1,448 Posts
Awesome Michael

Think I may try that for some coils I need to wind soon.

Josh
j8m8l is offline Find More Posts by j8m8l
Reply With Quote
Old Jan 06, 2004, 02:18 PM
Fanfold abuser
Jgardner's Avatar
Rochester Monroe Cty, New York, United States
Joined Aug 2002
1,577 Posts
Bonding

Will the wax then bond the coil? That would be slick if it did not weigh too much.
Jgardner is offline Find More Posts by Jgardner
Reply With Quote
Old Jan 06, 2004, 02:27 PM
Faroe Islands/Germany
epilot's Avatar
Joined Nov 2000
5,983 Posts
You bond the coil with CA or another glue of your choice. Epoxy works well. The wax is melted away.

Michael
epilot is offline Find More Posts by epilot
Reply With Quote
Old Jan 06, 2004, 03:31 PM
Faroe Islands/Germany
epilot's Avatar
Joined Nov 2000
5,983 Posts
The result

Here is the result - perfect little coil. I just emerged it in boiling water and all the wax disappeared as if by magic

500 turns 0.05mm wire, 5mm ID, 85ohms, 0.3grams

All credit goes to Jeppe who showed me how to do it.

IMHO it is THE easiest way to make a bobbin-less coil.

Michael
epilot is offline Find More Posts by epilot
Reply With Quote
Old Jan 06, 2004, 03:35 PM
Thats NOT indestructible
j8m8l's Avatar
London UK
Joined Apr 2002
1,448 Posts
Beautiful Michael.

What glue did you use for that one?

Josh
j8m8l is offline Find More Posts by j8m8l
Reply With Quote
Old Jan 06, 2004, 03:39 PM
Registered User
Dave Wulff's Avatar
USA, FL, Fort Lauderdale
Joined Feb 2002
1,902 Posts
Michael,

Very slick..another "whish I had thought of that"

Dave
Dave Wulff is offline Find More Posts by Dave Wulff
Reply With Quote
Old Jan 06, 2004, 03:46 PM
Faroe Islands/Germany
epilot's Avatar
Joined Nov 2000
5,983 Posts
Josh, I used a drop of CA.

Dave, I'm hoping this is the way to go with the really thin wire.

Christmas candles should be on sale now, no?

Michael
epilot is offline Find More Posts by epilot
Reply With Quote
Old Jan 06, 2004, 04:04 PM
Thats NOT indestructible
j8m8l's Avatar
London UK
Joined Apr 2002
1,448 Posts
I think that I am gonna have to save up for a mini lathe/mill combo.

There is so much I could do !

Josh
j8m8l is offline Find More Posts by j8m8l
Reply With Quote
Old Jan 06, 2004, 05:03 PM
Registered User
billystiltner's Avatar
United States, VA, Clintwood
Joined Nov 2002
3,666 Posts
Michael

Nice.
When I unwind the superthin wire I do it by hand and the bobbin I wind onto has a loose fit on a dowel. I twist the dowel so if the wire gets caught up or tangled the bobbin slips on the dowel.
You might be able to make something like that with a drill , the wire is really easy to break. The wax is a great idea to wind the
coils on. No fuss with keeping the flanges tight or pulling the straw from the bit. Allthough the most recent one I wound was pretty easy. The wax seems easier.

Billy
billystiltner is offline Find More Posts by billystiltner
Last edited by billystiltner; Jan 06, 2004 at 05:05 PM.
Reply With Quote
Old Jan 06, 2004, 09:40 PM
Grand Poobah of Nothing
Trizza's Avatar
Once Australia, now Finland
Joined Feb 2001
1,022 Posts
Beautiful! Now that I have a lathe I'll have to try this - winding coils used to drive me insane because even if I managed a full coil I'd destroy it trying to remove it from the form. Maybe I'll build a winder too now that I have piles of sewing machine motors to use. Cheers!
Trizza is offline Find More Posts by Trizza
Reply With Quote
Old Jan 06, 2004, 09:44 PM
Grand Poobah of Nothing
Trizza's Avatar
Once Australia, now Finland
Joined Feb 2001
1,022 Posts
PS - how was the wax to turn? Looks like it made a good finish.
Trizza is offline Find More Posts by Trizza
Reply With Quote
Old Jan 06, 2004, 10:08 PM
Registered User
rustycage's Avatar
West Virginia
Joined Nov 2002
38 Posts
How about those cheap thin birthday candles with paper/cardboard ends to make a bobbin or would that be too small for a coil? You could still melt the wax away and the paper would just fall off.
rustycage is offline Find More Posts by rustycage
Reply With Quote
Old Jan 07, 2004, 12:28 AM
Registered User
Portland, Oregon, USA
Joined Nov 2003
151 Posts
Hmmm -- Lost wax coils !!
dburley is offline Find More Posts by dburley
Reply With Quote
Old Jan 07, 2004, 06:38 AM
Sticky Shepherd
Graham Stabler's Avatar
Oxford/England
Joined May 2001
4,017 Posts
Come on epilot you can do better than this, you should have cast the wax mould with the magnet embedded, that way you can have coils with a spherical interior!
Graham Stabler is offline Find More Posts by Graham Stabler
Reply With Quote
Reply


Thread Tools