HEDMA

HEDMA is a hackable homemade EDM machine.

Documentation is in the FabricateEDM repository.

Maskin / Machine

The machine is homemade, using existing machines and parts.

Motion platform

The motion platform is a Ultimaker 1 3D printer.

Controller

We have replaced the original controller with an OpenBuilds Blackbox, and use an OpenBuilds Interface

Power supply

We are using the Powercore V1. Manual, hardware, firmware.

Programware / software

EDMWeb is the CAM software used.

Sikkerhet / safety

• do not touch when running
• stop cutting if a short occurs
• run only with dielectric fluid in the bath

Bruk / usage

The powercore guys made a nice video: Powercore V1 Quickstart Guide.

You need to have a dielectric fluid in the bath, de-ionized water is good. The workpiece is connected to the anode (positive side) and the tool to the cathode (negative side).

Plassering / location

The machine lives in a corner of the printer room.

Historikk / History

2024-03-20 

tested with 0.5 mm aluminium with success. The tool was 1.5 mm copper. Feedrate we think was 72 mm / min, because of the limit of the lowest pulse rate (240 Hz) that the avr 328p platform can generate with default grbl (with AMASS on. See grbl/config.h and #define ADAPTIVE_MULTI_AXIS_STEP_SMOOTHING).

2024-03-20 

tested with titanium (0.5 mm) but we had limited success, because our minimum feedrate (both plunging and X / Y moves) was too high. This seems to be a limitation of the controller.