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====2. Paper Slip====
====2. Paper Slip====
*Using the scissors, cut the small piece of paper to fit inside the rounded portion of the printed part (gen_base_01.stl). This will serve as the angular scale for the goniometer.
*Using the scissors, cut the small piece of paper to fit inside the rounded portion of the printed part (gen_base_01.stl). This will serve as the angular scale for the goniometer. The paper should fit in the region outlined in red.
*The paper should fit in the region outlined in red.
*With the protractor, transfer the angle measurements from the protractor in increments on 10 degrees onto the rounded slip of paper cut in step 2. Ensure that the measurements of 0 & 180 degrees line up with the center pivot point of the part.
*With the protractor, transfer the angle measurements from the protractor in increments on 10 degrees onto the rounded slip of paper cut in step 2. Ensure that the measurements of 0 & 180 degrees line up with the center pivot point of the part.
*Using the glue stick, attach the paper to the radial spokes protruding from the center pivot. The paper should sit below the outer rim of the rounded section.
*Using the glue stick, attach the paper to the radial spokes protruding from the center pivot. The paper should sit below the outer rim of the rounded section.
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[[Image:Gon_spin_graphic.jpg|400px|right]]
[[Image:Gon_spin_graphic.jpg|400px|right]]
====3. Snap Together====
====3. Snap Together====
*Snap the printed parts (gen_base_01.stl) and (geniometer_spinner_01.stl) together through the centers of the rounded portion. They should be aligned so that when the handles are pointing in opposite directions, their long straight edges align.
*Snap the printed parts (gen_base_01.stl) and (geniometer_spinner_01.stl) together through the centers of the rounded portion[(outlined in green)]. They should be aligned so that when the handles are pointing in opposite directions, their long straight edges align.
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Revision as of 17:22, 5 December 2019

3D Printable Goniometer

Project developed by Eric Houck, Houcke

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Abstract

Goniometers are simple devices used to measure the angular range of motion of human limbs. It is common for doctors to monitor the muscular recovery and rehabilitation of a patient using a goniometer. They are not expensive, however they are flimsy and break easily. A 3D printed goniometer can be more durable than a commercial one. Additionally, one may not always have a goniometer handy. Being a relatively simple device, a goniometer prints very quickly and cheaply. Typically, a doctor will use a goniometer to measure the range of motion of a patient. However, with the 3D printed version being so extremely cheap, patients can be provided their own goniometers to monitor their own range of motion, thus reducing expensive doctor's visits.

Goniometer3Dprint.jpg

Bill of Materials

Provide a full BOM -- Materials needed for fabrication of device and alternative materials if they are not available, prices/sources of non-printable parts

  1. Printed parts on Thingiverse https://www.thingiverse.com/thing:4022729 (Cost: 16 cents total filament use)
  2. Pencil (Cost: <$1.00 to purchase, however they are very common and can be borrowed at no cost)
  3. Small piece of paper (Cost: Take from recycling/garbage. This should be found for free with no issues)

Tools Needed

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. Paper
  3. Pencil
  4. Straightedge
  5. Protractor
  6. Scissors
  7. Glue Stick

Skills and Knowledge Necessary to Make the OSAT

  • Minor scissor skills to make the paper slip with the angle measurements

Technical Specifications and Assembly Instructions

  • Provide directions for print/assembly - be detailed enough in your “how to” to ensure that someone could construct the device from your description. Consider the elegance of IKEA like instructions.
  • Include print time estimate
  • Include assembly time estimate
  • Including drawings or pictures of the device at stage of assembly at minimum. (http://www.appropedia.org/Special:Upload)

1. Print Parts

  • Using your 3D printer, print out the attached thingiverse files
  • Print 1x gen_base_01.stl, 1x geniometer_spinner_01.stl, 2x goniometer_extend.stl
  • Total print time estimate: 40min
 Print Settings:
 Resolution: 0.3 mm
 Temperature: 205 C
 Material: PLA
 Print speed: 20mm/s edges, 40 mm/s infill
 Infill: 20%
 Retraction: ON, Z-hop: ON, Skirt: ON

2. Paper Slip

  • Using the scissors, cut the small piece of paper to fit inside the rounded portion of the printed part (gen_base_01.stl). This will serve as the angular scale for the goniometer. The paper should fit in the region outlined in red.
  • With the protractor, transfer the angle measurements from the protractor in increments on 10 degrees onto the rounded slip of paper cut in step 2. Ensure that the measurements of 0 & 180 degrees line up with the center pivot point of the part.
  • Using the glue stick, attach the paper to the radial spokes protruding from the center pivot. The paper should sit below the outer rim of the rounded section.
Gon base graphic.jpg
Gon spin graphic.jpg

3. Snap Together

  • Snap the printed parts (gen_base_01.stl) and (geniometer_spinner_01.stl) together through the centers of the rounded portion[(outlined in green)]. They should be aligned so that when the handles are pointing in opposite directions, their long straight edges align.


  1. Consider video if appropriate
Example video summary of textbook
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Common Problems and Solutions

  • The male end of the circular snap fitting can turn out poorly if the print speed is too high. I used a maximum of 40 mm/s

Cost savings

  • If your solution is not a low cost one then it is not really appropriate.
  1. Estimate your costs
  2. Find a commercial equivalent, cite it and put the [url in square brackets]
  3. Calculate $ savings and % savings

Benefited Internet Communities

  • Name and add links to at least 5 using single brackets around [url name]

References

  • The sources of information (e.g. engineering handbooks, journal articles, government documents, webpages, books, magazine articles etc.). References should use the <ref> </ref> and <references/> tags and can be in any format but should include all the information necessary for someone else to find the same information you did. For example: [1]
  1. web page: Department of Energy (DOE) Landscaping and Energy Efficiency, DOE/GO-10095 (1995) Available: http://www.eren.doe.gov/erec/factsheets/landscape.html

Based on the developmental needs addressed (e.g. food, heat, electricity, clean water, health care, etc.) be sure to label your device in the proper categories e.g. use [[Category:Water]]. Be sure to categorize your device so that it will be easy to find – for example “Low voltage connection basics” is categorized in [[Category:How tos]] [[Category:Electricity]] [[Category:Electric lighting]].

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