EDM

Now If I am printing from file and I lost connection then I can restore printing from last position and resume fine.

- Added LM358 and problem resolved.

- Ploting XYZ positions.

- Axis velocity estimations.

- Allowing to change spark ON time .

- Start connection to printer through NodeJS serialport and showing printer messages.

- Changed 100uF capacitor by 660uF.

Now I can import .obj files from Blender besides .ngc files from InkScape.

Updating design replacing UA741 with LM358 and adding 7805 to relay module.

I have problems to get real values at lowest voltages on ADC pin because I am using an OPAMP for symetric source (UA741) and I'm using ground for the negative DC PIN.

I can resolve this by two methods:

1.- Waiting for LM358 I buy recently which handle single supplies.

2.- Adding voltage biasing and correct received values though software but I loss usable resolution.

Falstad simulation

Geogebra graphic function

New features added:

- Three grid helper added in threeJS view.

- Changed axis colors in threeJS view to fit according to printer.

- Show electrode option in threeJS view and change diameter on it.

- Moving electrode forward based in estimations and do stop and back based in realtime.

- Allowing Invert print direction (print file mode)

- Allowing down electrode without change XYZ (to feed worn out electrode in print file mode)

- Reset XYZ button.

- Showing voltage values. (Added OPAMP in schematic for ADC pin)

- Relay to avoid positive electrode has dangerous voltage when IGBT is in off mode.

- Led connected to relay to dischage capacitor when IGBT is in off mode and to advise the electrode has voltage.

Next::

- Allow import file from a Blender scene with a line path.

Doing EDM machining from a GCODE file. Testing algorithm to execute EDM with XYZ displacement.

Now I use 555 with Mosfets to avoid the current 555 limitation.
Also I printed a support for one ER32 chuck and I have ready implemented an algorithm to move electrode according to .ngc files generated with inkscape GCODE tools and I can see the imported file in a ThreeJS canvas.

Falstad simulation