Newman machine replica

[CLaNZeR]

i am not sure if its related to the coil, i think your communicator is 90 degree offset?

Hi TheOne

I moved the tape to various positions on the shaft and found the best kicked was when the Ring magnet was vertical outside the coil. Sometimes it would do a full revolution and the spark would set it off on it's next but most of the time it would hit the spot in the tube where there is no wire and stop solid.
If I applied the power on full time the Ring Magnet would sit in the coil gap and you could not move the axle either way, it was stuck fast as such.

I am 90% this is the coil, it is no hassle to wind another one quickly and will see.

Cheers

Sean.

[CLaNZeR]

Did not get time to wind the new coil today as had to do a bit with the family, but managed to mill out a new end cap and cut some 80mm acrylic tube ready for winding as below.
Nice thing about using acrylic tube is that I can cut a 10mm hole and mount some mini bearings and do away with the axle holders that I had to use with the cardboard tube.

What I plan to do this time while winding is to poke out of the bearings on the acylic tube about 10mm of rod and just let the winding machine run the wire over these, then I will simply remove the rod and push the slack wire to the side before taping up. This should give me the full coil coverage I need.


More tomorrow

Cheers

Sean.

[CLaNZeR]

Well she runs, have attached a picture and Video.

The coil now has no gap after a bit of messing around with coil winding machine and it kicks around the full rotation now.

I am running it with a 12 Volt Battery and it is pulling around 10ma as can be seen on the video.

The coil is now 2000 winds of 0.25 wire around a 80mm tube and is exactly 200 ohms.

With this much resistance in the coil it seems hard to get a spark as no current is hardly being pulled, but it has been running for over 1 hour now and there is a very small spark and the battery has now dropped at all.

Also I am not sure on whether the NEO ring magnet is a good or bad thing, umm might try get a Ceramic and see if there is a difference.

Going to mess around with the  timing a bit to see if I can get some more RPM's out of it. I measured it with a laser Tacho earlier and it was doing 200 RPM.

Cheers

Sean.

[CLaNZeR]

Sean,

When you wind the new coil, can you make the coils more horizontal than vertical on the tube (flower pot).  Same wraps, but in a smaller area so they stick out more (say you had a 2" wide coil on each size, make is 1")..  Also, I have a lot more on the criss-cross of the axle.  And my fire point is when the ring is a couple degrees past the winding.  And man does it throw that thing around with 12volts.  Why I need more windings

Sounds like something is surely wrong with that first coil. 

I have been in family mode as well, and looks like I will be today as well.  So I am out until next week, not sure I have enough wire to get 200 ohms anyway.

Mike

Oh, there is a post on a peturbing static field you might want to look at as well.  Looks pretty simple if it works. 

Hi Mike

I think you will find that if you increase your windings the kick on the motor will not be as powerfull but it will pull less current.
I am going to strip down the 1st coil and cut it back to 50 ohms and prove whether I am right on this.
Will let you know!!

Darn weekend is going fast again so runnign out of time, but only 7 weeks left and might be working back home during the week

Cheers

Sean.

[CLaNZeR]

Stripped the 1st coil back to 39 ohms and spread the wire across the middle.

Just as I thought over 1000RPM and hell of a kick, nice spark with the lights out but pulls 50ma at 12volts.

Video attached.

Cheers

Sean