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• filters, RL, LC, RC circuits

  3drobert • 04/24/2022 at 03:49 • 0 comments

• transformers

  3drobert • 04/09/2022 at 19:36 • 0 comments

  falstad simulation

• PCB needle method

  3drobert • 10/11/2021 at 05:57 • 0 comments

  PCB needle method

• Blender gear (script)

  3drobert • 10/06/2021 at 15:30 • 0 comments

  Finally I have summarized all in a Blender script. (Added as files for this project)

  This create a worm drive (screw and gear) and a nut if you only need screw and nut. You can adjust some usefully tolerances too.

  Don't use the addon in your scene. Load this file in another empty scene.
  I still need to put a picture on addon to facilitate more comprehension.

  
  The scene have a can of soda to have dimensions reference too.

  Enjoy it ;)

  Note: This need "Extra Objects" addon

• Blender gears

  3drobert • 10/03/2021 at 19:07 • 0 comments

  http://www.valvias.com/prontuario-rosca-metrica-din-13.php?m=11

  Linear pitch: 1.5mm 

  Tooths: 20

  Adapt Pitch diameter multiplier to get Outside diameter (10mm)

  Creating the screw

  Creating the gear

  Creating one screw nut

  -

  Creating the screw axis

  Creating the gear axis

  
  

  now I will indicate some tolerance corrections to perform simulations, machining or to make 3D printing

  Sources:

  https://www.metalmecanica-facil.mahtg.com/tsinfycor/calculador-tornillo-sinfin-y-corona.html

  http://www.valvias.com/prontuario-rosca-metrica-din-13.php?m=11

  https://docs.google.com/spreadsheets/d/1aFcktbNmx7cTsuAU0JgZB2Xayx76sSm1ici_PpTlju8/edit?usp=sharing
  

  CONF adjusting tolerances:

  Reduce 10um gear axis diameter

  Reduce 10um screw axis diameter

  Down 10um nut tooth top  (1.125mm to 1.115mm)

  Up 10um nut tooth top (0.375mm to 0.385mm)

  Note: Make the same for the nut tooths

  Now join the axis tooths

  and nut tooths

  and gear axis

  -

  20 tooths = 1:20 (around 75um per 1.5mm step)

  reductor multiplier :)

  1.5mm/20 = 75um

  75um/20 = 3.75um

  3.75um/20 = 187.5nm

  187.5nm/20 = 9.375nm

  If I place more of these I could do a kind of clutch disconnecting 2 and 3 and connecting 1 and 4 when apply some movement of joystick. I will need to handle micro-things in 2D/3D for future projects.

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