Thread Tools
Old Jan 06, 2004, 01:49 PM
epilot is offline
Find More Posts by epilot
Only nerd in the village

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
Sign up now
to remove ads between posts
Old Jan 06, 2004, 02:13 PM
j8m8l is offline
Find More Posts by j8m8l
Thats NOT indestructible
j8m8l's Avatar
Awesome Michael

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

Josh
Old Jan 06, 2004, 02:18 PM
Jgardner is offline
Find More Posts by Jgardner
Fanfold abuser
Jgardner's Avatar

Bonding


Will the wax then bond the coil? That would be slick if it did not weigh too much.
Old Jan 06, 2004, 02:27 PM
epilot is offline
Find More Posts by epilot
Only nerd in the village
You bond the coil with CA or another glue of your choice. Epoxy works well. The wax is melted away.

Michael
Old Jan 06, 2004, 03:31 PM
epilot is offline
Find More Posts by epilot
Only nerd in the village

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
Old Jan 06, 2004, 03:35 PM
j8m8l is offline
Find More Posts by j8m8l
Thats NOT indestructible
j8m8l's Avatar
Beautiful Michael.

What glue did you use for that one?

Josh
Old Jan 06, 2004, 03:39 PM
Dave Wulff is offline
Find More Posts by Dave Wulff
Registered User
Dave Wulff's Avatar
Michael,

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

Dave
Old Jan 06, 2004, 03:46 PM
epilot is offline
Find More Posts by epilot
Only nerd in the village
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
Old Jan 06, 2004, 04:04 PM
j8m8l is offline
Find More Posts by j8m8l
Thats NOT indestructible
j8m8l's Avatar
I think that I am gonna have to save up for a mini lathe/mill combo.

There is so much I could do !

Josh
Old Jan 06, 2004, 05:03 PM
billystiltner is offline
Find More Posts by billystiltner
Registered User
billystiltner's Avatar
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
Last edited by billystiltner; Jan 06, 2004 at 05:05 PM.
Old Jan 06, 2004, 09:40 PM
Trizza is offline
Find More Posts by Trizza
Grand Poobah of Nothing
Trizza's Avatar
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!
Old Jan 06, 2004, 09:44 PM
Trizza is offline
Find More Posts by Trizza
Grand Poobah of Nothing
Trizza's Avatar
PS - how was the wax to turn? Looks like it made a good finish.
Old Jan 06, 2004, 10:08 PM
rustycage is offline
Find More Posts by rustycage
Registered User
rustycage's Avatar
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.
Old Jan 07, 2004, 12:28 AM
dburley is offline
Find More Posts by dburley
Registered User
Hmmm -- Lost wax coils !!
Old Jan 07, 2004, 06:38 AM
Graham Stabler is offline
Find More Posts by Graham Stabler
Sticky Shepherd
Graham Stabler's Avatar
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!


Thread Tools