Tuesday, January 20, 2015

3D Print School Building Assignment

3D Print School Building Assignment: Classroom Repair

Above: Some of the first attempts
to solve featuring the spring version
Learning Challenge:
Repair part of the classroom and produce a working replacement part using a 3D Printer.

This was the very first task assigned to our class of Y7/8 students upon the initial delivery of the first 3D Printer to our school - May 2014.  It was completed with the delivery of the Ultimaker 2 to our school - November 2014.  (Had the Ultimaker 2 been delivered first the timeframe would have been one to two weeks from start to finish. Y7/8 is 11-13 year old.)

Students brainstormed a part of the classroom that needed to be fixed or repaired.  Students were briefed to look for something that fitted the size of the 3D Printer and could easily be replicated.   A resource cupboard in the classroom had two latches, both of which had been broken and bent as a result of constant use.

Level of Difficulty:
Introductory, possible extension. 
Original Design using older style print
Students to solve problem depending on the state the classroom, the more modern the classroom the more challenging this would be.   We also looked at hooks, holders and various resource creations.

First time the printer was used.   The mechanism in the original latch featured a spring mechanism to lock it, which couldn't be replicated.   Students tried 5 or 6 regular versions of the print before one of the group came up with the 'ball and socket' approach.   Students didn't consider attaching the latch to the door which caused them to increase the depth of the base of the latch.

This was the original video created by students in my class that explained the process - please note the clip features a 3D Print from our original Printer, which has now been replaced by the Ultimaker 2.

Later version using Ultimaker 2
This task was completed by Y7-8 students (11-13 year olds).   The initial designs were completed as sketches by one student, by hand, then refined using Tinkercad  The school at this stage had a Diamond Mind 3D Printer.  This caused delay with the print as it was our first time completing a 3D Print Project.  The time frame was two months.   The second go at this, with our Ultimaker 2 saw a time frame of under twenty minutes for the first print (from design).  Students used Tinkercad for the first run with its pull and shape design.   The design had already been determined by the initial prints - the students had realised quickly that they couldn't replicate the spring mechanism of the 3D Printer and so developed a ball and socket approach.  This worked fantastically.

Short: 20 minutes from design, print time in region of 20 minutes to half an hour.

The finished print was approximately 7cm by 7cm with a depth of 5cm.

Above: This Slideshow was created to explain the process to solve the cupboard problem - it shows the progression and the development of the designs - the original idea of the clips being replaced by the socket design.

Identification of problem that needed to be resolved - in this case it was a broken part of the classroom that needed to be repaired.  Students initial designs were reshaped during the process.  

Problem Solving:
Measurement.  Extension: location and strength of the screw holes.   Students also needed to determine the diameter and location of the screw holes.   By using a ball and socket approach students needed to consider the depth, diameter and circumference of the latch that they were creating.  When the latch was mounted there were issues related to the door.
View of socket with later design

Further Reading:
This slideshow was created by students from Auroa Primary School.  The photographs that accompany it relate to the Diamond Mind Printer/Print.   Our School no longer has this hardware and is now printing exclusively with Ultimaker 2.

How Can You Contribute: 
Have you used a 3D Printer to repair something in your classroom? Have you designed or repaired something in your classroom/school and can you send us the details so we can share and use your examples to encourage others?

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