Cotton extractor(yarn maker).jpg
FA info icon.svg Angle down icon.svg Device data
Manufacturing files
Hardware license CERN-OHL-S
Certifications Start OSHWA certification
FA info icon.svg Angle down icon.svg Project data
Type Yarn maker
Years 2018
Made Yes
Replicated No
Cost USD 4
OKH Manifest Download

This is a cotton to yarn maker. Also known as Indian charkha. Cotton obtained from the farm can be extracted into yarn with this tool. originally made of wood, Using 3D printer this tool can be made and put into use. The yarn can be used as threads in the textile industry.

Bill of Materials[edit | edit source]

  1. 3-d printed cotton to yarn maker
  2. cotton
  3. bolt; used as a shaft for the wheel to spin
  4. needle to spin a yarn around it

OpenSCAD and STL files can be found here: | yarn maker

Tools needed[edit | edit source]

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. A File, only if needed to file the printed part.

Skills and knowledge needed[edit | edit source]

  • Basic Open Source CAD skills
  • 3-D printing skills

Technical Specifications and Assembly Instructions[edit | edit source]

  1. Download the STL file from the link given in the Bill of Materials.
  2. Convert the STL to a gcode file using Cura.
  3. Print the files using Cura or any other related software.
  4. Once the part is printed, remove it from the bed.
  5. Assemble the different parts using bolts and nuts viz the base, the wheel, the needle stand, the wheel handle, spindle
  6. the wheel fits on one end and the needle holder fits on the other, use a large width needle to fit the spindle on the needle holder
  7. Use a cloth or thread like a belt conveyor assembly around the wheel and spindle
  8. using the handle on the wheel rotate the wheel to see its tightly fit or else tight the thread little more tight
  9. now use a cotton at the end of the needle; rotate the wheel, cotton will extract into threads on the needle
  10. bigger the wheel to spindle distance times the rotation can be achieved.
  11. The CAD and STL files are uploaded and can be modified according to the dimensions
  12. The print time is anywhere between 3-4 hours depending on the size of the tool and the print speed given and the assembly time is 20 min.

Common Problems and Solutions[edit | edit source]

  • Each part needs to be printed separately
  • for the bigger wheel to spindle distance the print bed is small; Solution is to snug fit bases for the bigger wheel to spindle distance
  • the needle around the spindle needs to rotate with the spindle; which may not because of the smaller needle; solution use a rubber bush

Cost savings[edit | edit source]

  1. Cost of printing is not more than 4$.
  2. commercial equivalent is around 100$

Benefited Internet Communities[edit | edit source]

*Requests for OS 3D Printable Objects

References[edit | edit source]

  • Concept was inspired from this video.[1]
FA info icon.svg Angle down icon.svg Page data
Keywords 3d printing, charkha, cotton, osat, yarn, thread, plastic
SDG SDG09 Industry innovation and infrastructure, SDG10 Reduced inequalities, SDG11 Sustainable cities and communities
License CC-BY-SA-3.0
Organizations Michigan_Tech's_Open_Sustainability_Technology_Lab, MTU, MY4777
Language English (en)
Related 0 subpages, 5 pages link here
Impact 531 page views
Created December 7, 2018 by
Modified June 18, 2024 by Felipe Schenone
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