• Restoring lost connections

    3drobert • 07/28/2024 at 03:19 • 0 comments

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

  • more enhancements

    3drobert • 07/27/2024 at 04:11 • 0 comments

    - 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.

  • Using Blender .obj file to route EDM job

    3drobert • 07/26/2024 at 04:08 • 0 comments

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

  • Updated design

    3drobert • 07/25/2024 at 02:49 • 0 comments

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

  • Dual supply OPAMP voltage follower without negative source

    3drobert • 07/24/2024 at 21:01 • 0 comments

    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 EDM features

    3drobert • 07/23/2024 at 20:45 • 0 comments

    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.

  • Testing algorithm to execute EDM from GCODE file

    3drobert • 07/22/2024 at 12:19 • 0 comments

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

  • Voltage multiplier using 555+mosfets for EDM

    3drobert • 07/20/2024 at 18:56 • 0 comments

    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