EDM machines.

**m_c** · 31-10-2014

Actually, just checked and it's this book I've got - https://secure.villagepress.com/stor...etail/item/797
Still only covers a basic RC build though.

**Robin Hewitt** · 31-10-2014

I made mine to despike a 6 pounder ships cannon. After days of burning the note suddenly changed and started coming out of the muzzle. I dashed round the front and peered down the pipe at a fog of paraffin vapour with a crackling spark just bursting through at the bottom. Not so much a bang as a womp when it reached it's flash point, made me leap backwards

**Jonathan** · 31-10-2014

A wire EDM machine would be a nice project - there's a couple of DIY ones on youtube.
There's one in the workshop for electrical engineering at uni (and more in mech. eng). They mainly use it for cutting electrical steel laminations for research into electrical machines. I took a few photos a while ago, to get some ideas:

It does use up the wire quickly and as expected the feedrate is very low - a few mm/min and much less round sharp corners seems typical. Linear motors too...