Electrical Discharge Machining with old Doorbell Parts

Jeri shows a machine for spark machining with a doorbell solenoid. Example work piece is a stainless steel razor blade.

Category:

Education

Tags:

• Jeri Ellsworth
• George Sanger
• EDM
• Spark Machining
• door bells

[M1ST3RHYDE]

What was the voltage you used in this set up/ Thanks

[jeriellsworth]

@M1ST3RHYDE 9-12v

[MrGwaai]

would it cut non ferrous metal?

[jeriellsworth]

@MrGwaai It should.

[adavid7901]

@jeriellsworth the metal has to be electricaly conductive so its a no to plastics or anything of the like

[jeriellsworth]

@adavid7901 I didn't claim plastics. It should be obvious from my demo that the work piece is part of the circuit.

[rasz]

I want to know why arent you on Discovery Science? There is so much junk on there and so little science. You on the other hand can fill whole science book chapter in 5 minute clips that are interesting and fun to watch.

[kornweasel]

It's a laser razor! Great vid!!

[MugbyJunction]

In normal use the electrode, or wire of an EDM does not come in to contact with the workpiece. Besides flushing away debrit this is why they run in oil or water. The charge ionises the fluid and the spark occures in this ionised zone. If the electrode and workpiece contact each other a short is created - not good. Also you would normally use disimilar materials for workpiece and electrode in order to reduce electrode wear.

[TheCerberusInferno]

Excuse me i still have problem to understand your video , can you explain please why a solenoid ? ..

[Technoguy3]

@rasz I can only imagine what can be done on a big Discovery Channel budget!

[bbcisrubbish]

I saw a demonstration of a spark eroding machine where a "T" shape was cut.

Most interesting.

[M1ST3RHYDE]

@jeriellsworth

Thanks:) I watched it over again and saw that I missed that part.

[hal02modder]

I love how you used a micrometer to clamp it...

[TheKingPhisher]

It's basically a spark plug

[Samqdf]

I find this facinating, I am thinking a solenoid off a car starter motor, 2 x isolated linear bearings, hardened shaft with an electrode holder and a car battery for power. What is the best material for the electrode?