Re: Turning an E Core Power Transformer into a Tattoo Gun

On Sun, 10 Jun 2007 17:10:28 -0700, a7yvm109gf5d1@xxxxxxxxxxx wrote:

On Jun 10, 4:09 pm, D from BC <myrealaddr...@xxxxxxxxx> wrote:
On Sun, 10 Jun 2007 13:45:41 -0700, whit3rd <whit...@xxxxxxxxx> wrote:
On Jun 9, 11:41 pm, D from BC <myrealaddr...@xxxxxxxxx> wrote:
I think I can convert an E core AC power transformer into a tattoo
gun.

If I sliced off the top of the E core, that would make two gaps. It's
now an electromagnet if I apply DC.

A spring is used to pull the needle up.
Magnetic force pulls a metal plate and the needle down.

How big of a transformer should I hack up?.. I have a pile of all
sorts in the junk box..I'm guessing 20watts.

The '20 watts' means the core can take roughly an amount of magnetic
energy equal to

Estored = 20 W/(120 per second) = 0.16 W-second = 0.16 Joules

That is (again, roughly) the amount of force x distance (work) that
is available to drive your point into the vinyl. This is slightly
complicated
by the spring (it has to compress the spring at the same time,
and the spring has to be stiff enough to pull the point out).

I'd think in terms of a hot knife to score the vinyl, if it was me.
Noise
is just as annoying as hot-plastic-odor.

I've been thinking about the hot knife technique for cutting 4mil
vinyl.
I could heat up a power resistor and use the hot lead.
The lead is then dragged on the vinyl to cut it.

But...I think vinyl makes an acidic goo that'll eat through the
wire..but not sure.
Also...the heat emission I think makes a fat cut.

I've been looking at ultrasonic cutting methods too..
For example:http://www.sonotec.com/cutter2/SF60en.pdf

I can probably make an ugly but functioning generator in 1 day.
I just don't know about getting the transducer.
D from BC

Good grief, just stick the *** in an old 24 pin dot matrix printer
with no ribbon.
4mil thick vinyl is the same thickness as a *** of paper. Worst case
you'll have to disassemble the print head and sharpen the pins... But
you like that kind of stuff right? :)

Yeah...I had a similar thought..
The problem is that the 4mil vinyl needs to be cut after it's mounted
on a *** of plastic.. That won't feed through a printer.

I'm trying to think of scrap equipment that has powerful solenoids
with >4mil movement and capable of 10Hz.

I have a car scrap yard nearby...so maybe:
fuel injector?
door solenoid?

Also..I got adventurous enough to email a factory ...in China!
I'm curious about a 60W solid state IR laser... Arrrfff! Arrrfff! :)
All those people selling laser diodes on Ebay probably got all this
stuff from china anyways...
D from BC
.

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