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Inside Corner Trowel

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MOST Delta filament as guide.JPG 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.

Inside Wall Corner Trowel[edit]

Project developed by MatthewPollack (talk) 07:05, 6 December 2016 (PST)

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.


When money is hard to come by and other tools take priority, a tool that makes a corner at a 90 degree angle is usually not high on the list of equipment to buy. I wanted to make a relatively cheap tool that can do this. Normally a tool like this can go from anywhere between $10-20 but since it has a relatively small window of use, it is not often purchased. This project was designed for people that cannot afford a more expensive version of this tool as printing this in PLA is approx. $2.00

Project completed.jpg

Bill of Materials[edit]

  1. Total two parts made in OpenSCAD. Total ~150 grams of filament
    1. Cornering Tool
    2. Handle
  2. All files posted at : | Youmagine Link

Tools needed for fabrication of the OSAT[edit]

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

Skills and Knowledge Necessary to Make the OSAT[edit]

  • None, just connect the two pieces together as shown in the picture.

Technical Specifications and Assembly Instructions[edit]

  1. Printing Instructions:
    1. Print Speed : 60 mm/s
    2. Fill Density : 25%
    3. Layer Height : .15 mm
    4. Support Type : Touching build plate, ONLY FOR THE HANDLE
    5. Platform Adhesion Type : Glue stick
  2. Print time : ~13 Hours, 8 hours for the main part, 5 for the handle
  3. Assembly Instructions:
    1. Connect the two pieces as shown in the picture above.
    2. Assembly time: 1 minute

Common Problems and Solutions[edit]

  • Be careful removing the main Cornering Tool piece from the glass bed. Use an exacto-knife and carefully remove to not break the glass.
  • Be sure to use sufficient adhesive on the glass bed so that the main Cornering Tool piece does not have its edges bow upwards.

Cost savings[edit]

  1. Total Material Amount: 200 grams
  2. Estimated Cost: ~ $1.50 depending on filament price
  3. Commercial Cost: $10-20 | Home Depot's Wall Cornering Tool
  4. Total Savings: ~7.50