[SuperUnknown] has revealed a secret challenge he’s been engaged on. He’s cooked up an EDM attachment for 3D printers, or any CNC machine for that matter. Electrical Discharge Machining (EDM) is a technique of utilizing sparks to machine metallic. EDM isn’t a brand new know-how, in truth business machines have been round for the reason that 1960’s. In case you’ve ever had an arc scar up your multimeter probes, you’ve unwittingly completed a little bit of EDM.
The idea behind EDM is easy: Excessive voltage between the software and workpiece causes sparks to leap between them. Every spark erodes the workpiece (and the software). Huge EDM machines carry out their magic in a liquid which acts as each a dielectric and a flushing medium. This liquid could be something from deionzed faucet water to specifically formulated oil. [SuperUnknown] is utilizing good old school faucet water.
As you may think about, a single spark received’t erode a lot metallic. EDM machines fireplace tens of 1000’s of instances per second. The precise frequencies, voltages, and currents are secrets and techniques the machine producers hold near their chests. [SuperUnknown] is zeroing in on 65 volts at 2 amps, working at 35 kHz. He’s made some nice progress, gouging into hardened recordsdata, eradicating damaged faucets from brass, and even eroding the impression of a coin in metal.
Whereas we’d like to say this can be a free open supply challenge, [superUnknown] wants to pay the payments. He’s going with crowdsourced funding. No, not one other Kickstarter. This challenge is taking a special route. The movies of the machine might be uploaded to YouTube and visual to [superUnknown’s] Patreon supporters. They will even be out there for hire utilizing YouTube’s new rental system. [SuperUnknown] has pledged to determine a approach to make the content material out there for ravenous school college students and others with restricted incomes.
Based mostly upon his earlier adventures with lil’ screwy, his homemade 100 ton press, and numerous different tasks on the Arduino verses Evil YouTube channel, we expect [superUnkown] has a reasonably good probability of constructing dwelling EDM work. Click on previous the break to see two movies of the 3D printer EDM toolhead in motion. We should always point out that [SuperUnknown] is somewhat colourful along with his dialogue, so be sure to’re utilizing headphones for those who’re at work.