Community Comment Box

This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printing Please leave comments using the discussion tab. The course runs in the Fall semester. It is not open edit.

Locked Community Comment Drop Box

Project developed by mcbrand

Status
This OSAT has been designed but not yet tested - use at own risk. This OSAT has been prototyped. You can help Appropedia by contributing to the next step in this OSAT's status.

Abstract

1. Picture of completed print seen to the right
   

This OSAT prototype is a community comment box where members can drop in comments that can not be removed other than by removing the lock from the back. This fulfills the need for communities to provide a location for honest feedback that can not be tampered with.

Bill of Materials

1. BOM for this project includes:
   • PLA (This revision printed in white, Hatchbox PLA)
   • Lock of choice to lock box closed
2. Link to all source files from open source CAD:
   • Box bottom FreeCAD: File:Box bottom.FCStd
   • Box top FreeCAD: File:Box top.FCStd
3. Link to all STLs:
   • https://www.youmagine.com/designs/lockable-community-note-drop-box

Tools needed for fabrication of the OSAT

1. MOST Delta RepRap or similar RepRap 3-D printer

Skills and Knowledge Necessary to Make the OSAT

• No special skills are needed

Technical Specifications and Assembly Instructions

1. First print both lower box and lid portions of the drop box.
   • Print speed: 100 mm/s
   • Infill: 10%
   • Layer height: 0.2 mm
   • Temp: 205 degree Celsius
2. If support in the print was used, remove the support material so the lid can slide in.
3. If no support material was used, simply slide the lid into the grooves and lock it via the holes on the back side.

• Estimated print time for the lower box portion is 7 hours. Estimated print time for the box lid is 2 hours.
• Assembly time is minimal. Simply slide the lid in the slot and lock the box.

Cost savings

1. Estimated costs: $3.59
2. Commercial equivalent: $11.15 [1]
3. $ savings: $7.56
4.  % savings: 68%