Low force snaps

Project developed by Jacob Gerdt

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Abstract

There is a pretty simple idea behind this OSAT project and concept is straight forward. A simple snap system that can be used in multiple ways. Something like a snap system might not seem like much but think of the idea when you don't have retail outlets close to you. Snaps can be used in a variety of ways; shirts, coats, satchels or bags, or any other system that would be desired to hold together. This simple idea of a snap system and the varities of of uses make this an aopporiate OSAT project. This snap system can be ultered to be size appropriate for the job it is needed for. This design is based off of a sew in style, has holes to be attached by sewing, and has a peg system similar to that of legos. This style is simple b ut effective and doesn't need large forces to manipulate them but strong enough to hold together.

Design recap

  1. Two peice stsyem utilizing male and female mating system
  2. Male peice has the peg system
  3. Female has the hole system
  4. Sew in style installation
  5. Easy to snap but snap holds strong
  6. Simple, clean, effective
  1. Picture of completed print using
    File:Name-of-your-image.png

Bill of Materials

  1. 3-D printer
  2. OpenScad
  3. PLA filiment
  1. STL file
  2. OpenScad file

Tools needed for fabrication of the OSAT

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. OpenScad or other Cad software http://www.openscad.org/

Skills and Knowledge Necessary to Make the OSAT

  • Basic knowledge of your 3-D printer and software used to make the model

Technical Specifications and Assembly Instructions

  1. Download the files listed above
  2. Prep your printer and load the .stl file and slice into a .gcode file
  3. Print snaps, clean, and get ready of installation
  4. Once the snap system is printed, attach to desired surface using any sort of string, yarn,thread, or any other material that can be used in a sewing fashion. Once the snaps are attached to their designated postions, snap together.
  • Print time will vary on size of snaps
   Original file: 21 minutes  Half size: 5 minutes
  • Assembly time we be the amount of time it takes to sew into place
   Approximatly 2 minutes
  1. Including drawings or pictures of the device at stage of assembly at minimum. (http://www.appropedia.org/Special:Upload)


Common Problems and Solutions

Mating together

  • The peg length is important to ensure that the two paices stay mated together
  • The pegs on the male piece and the holes in the female piece need to have the correct allowance to they are easy enough to snap together but able to stay snapped together

Cost savings

  • If your solution is not a low cost one then it is not really appropriate.
  1. Estimate your costs
  • 40mm snap using 1117.4mm of filiment
  • $0.10 per peice
  1. Find a commercial equivalent
  • 4 peice snaps 30mm sew on snaps $1.82/per peice

http://www.amazon.com/Dritz-Sew-On-Snaps-30-Mm-Black/dp/B0016ZZRYM/ref=pd_sim_ac_5?ie=UTF8&refRID=01DAP2P4NDWQ13XDGYE2

  1. Calculate $ savings and % savings

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

<nowiki> 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. Be sure to categorize your device so that it will be easy to find – for example “Low voltage connection basics” is categorized in

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