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G-EDM

The G-EDM is an electrical discharge machine that supports sinker EDM, EDM engraving, EDM drilling and Wire EDM operations. #Drahterodieren

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The G-EDM is a fully automated ESP32 based three axis EDM CNC machine that supports different kinds of electrodes like brass tubes or brass sheets and is highly customizable. With the new wire EDM extension it is possible to cut high precision parts out of aluminum, mild steel, HSS and other metals. Besides normal operations like drilling and wire EDM it also provides an experimental EDM engraving mode that uses a normal brass rod as a floating electrode to engrave text into metal or erode pockets.

It uses 3D printed parts where it is possible and in the future it may support even laser and mill operations.

The G-EDM pulsegenerator is basically a modern buck converter based pulse power supply that does not need a power resistor.

All PCBs use big ground planes, feedback signal traces are fenced with via stitches and in general all ground zones on different layers are connected together with via stitches to get the best possible performance out of it.

The G-EDM ( new video )

The final version of the control panel:

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yfsnd wrote 06/11/2024 at 05:38 • point

Very nice design! I am very interested. Have you shared the circuit schematics and the PCB files? Where can I check them?

  Are you sure? yes | no

Mike K wrote 03/13/2024 at 13:31 • point

Amazing work. I am waiting for the PCB files to build and test one myself. I had made an edm machine in the past but my spark wasnt strong enough. Hopefully this board works in my machine.

  Are you sure? yes | no

dgourlay wrote 11/22/2023 at 22:44 • point

this is GREAT!  I just saw your youtube.  Excellent work!

  Are you sure? yes | no

gedm-dev wrote 11/23/2023 at 07:41 • point

Thanks. Wish it would be finished soon. But still so much to do.

  Are you sure? yes | no

H wrote 10/06/2023 at 00:59 • point

Looks amazing so far! As far as I know there haven't been any other EDM makers that were willing to share their files, so thanks (even though you're not to that point yet)!

  Are you sure? yes | no

gedm-dev wrote 10/06/2023 at 02:19 • point

The only thing unreleased are the PCBs and people may be surprised how simple they actually are. The ESP motion controller is jsut a breakout board that makes life easier. The pulseboard is a little more complex but still pretty basic. At some point they will be available.

  Are you sure? yes | no

H wrote 10/06/2023 at 23:51 • point

Oh dam I should look more into this. I don't need the motion board since I already have individual drivers + breakout boards that are easy to wire

  Are you sure? yes | no

gedm-dev wrote 10/07/2023 at 00:34 • point

The breakoutboard is very useful. It extends the SPI Mosi/MISO/CLK pins and allows to wire the display without hacking 3to1 jumper wires.

  Are you sure? yes | no

Jimmy wrote 10/04/2023 at 08:44 • point

Does your GRBL version backtrack on short?

  Are you sure? yes | no

gedm-dev wrote 10/05/2023 at 07:26 • point

Yes. The planner of grbl was replaced with one that can move back in history.

  Are you sure? yes | no

Piotr wrote 08/10/2023 at 00:00 • point

How feedback circuit looks like? I want to build similar machine and have problem in this part.

  Are you sure? yes | no

gedm-dev wrote 08/10/2023 at 01:31 • point

The feedback is just a voltage divider. that outputs between 0 and 2.8v depending on the voltage drop created. Everything else happens at software level.

  Are you sure? yes | no

joram wrote 07/12/2023 at 08:48 • point

This looks interesting. Is the esp32 code already in a sharable state?

  Are you sure? yes | no

gedm-dev wrote 07/12/2023 at 12:49 • point

Almost. I just need to confirm that the Y axis works too. Currently building the axis. Should be ready soon.

  Are you sure? yes | no

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