Sourcing Guide¶
Note
Fully assembled & tested boards, components, and kits may be available on the community discord.
Electrical Assembly¶
Motionboard¶
The Motionboard is the main brain of the G-EDM, driving up to 4 motion axes, and controlling the pulseboard, display, and power system.
The latest release version of the Motionboard is the EVO III.
Check the community discord for fully assembled and tested Motionboards.
You can also order an assembled Motionboard from PCBWay's assembly service.
ESP32 Devboard¶
The Motionboard needs an ESP32 Devboard to run the G-EDM's firmware. The recommended Devboard is the one with 19 pin headers on either side. It is recommended to double check the pinout.
Stepper Drivers¶
The Motionboard needs stepper motor drivers for the motion axis.
The recommended drivers are the TMC2209.
Display¶
The recommended display is the ILI9341 2.8" display
Note
On self-sourced displays, you will need to connect a solderable jumper to configure it for 3.3v operation.
more detail
Power Unit¶
The Power Unit is responsible for voltage and current control of pulses.
The recommended Power Unit is the DPH8909.
Note
There are two versions of the DPH8909, with different communication standards.
Make sure to get the one marked as TTL!
Pulseboard¶
The Pulseboard is responsible for actually switching the current pulses, as well as monitoring gap voltage and current.
The latest release version of the Pulseboard is the EVO III.
Check the community discord for fully assembled and tested Pulseboards.
You can also order mostly assembled Pulseboard from PCBWay's assembly service, but you will need to finish it yourself. PCBWay: EVO III Pulseboard
Current Shunt¶
The Pulseboard requires an external 10A 75mV current shunt for its current measurement.
12V 3A Power Supply¶
The Pulseboard needs a 12V power supply.
12V 10A Power Supply¶
The Motionboard requires a 12V power supply.
80v 6A Adjustable power supply¶
The DPH8909 needs a 80v input voltage.
Amazon: 80v 6A Adjustable power supply
Consumables¶
EDM wire¶
Uncoated brass EDM wire is recommended, with a diameter of 0.25mm being a good starting point.