ES1050
24-25
Fall Project Phase 1
1 Phase 1 Overview
Phase 1 of the Fall Project is focused on the design and development of a diffuser (an example can be seen in the white component in Figure 1) for the wellness lamp. By the end of Phase 1, each student will have individually designed a 3D model of a diffuser in Onshape for submission (assignment due Oct 21) and to share with their group to support their group diffuser design that will be 3D printed in Phase 2.
Figure 1: ES1050 Wellness Lamp Prototype
2 Diffuser Design
Diffusers can be made from any material(s) that scatters light to soften and direct it as needed but must include 3D printable component(s), fully modelled in Onshape. Designs should consider how to ensure enough lux is transferred to meet light therapy requirements for the different modes along with providing an even diffusion (distribution along the diffuser).
Constraints
Table 1: Constraints and Measures for Diffuser
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Constraints Measures
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Maximum height of 110mm
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Height in mm of 3D Onshape model
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Cannot hang over the base (no wider and no longer than the base)
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Length and width in mm of the top view of the 3D Onshape model
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Must connect to the base using a single M3x6 screw to the top of the light tower
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Connection to base using single M3x6 screw at the top of the light tower
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Must have 3D printable component(s)
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Clearly indicated design elements in 3D Onshape model including materials if proposing a composite material design
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Objectives
Table 2: Objectives and Measures for Diffuser
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Objective Measure
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Maximize esthetics
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Unique and simple design with consideration to colour, shape, contour, balance and evoking meanings for users
Note: 3D printing of group diffuser designs in phase 2 will be
limited to white or transparent PETG filament. This should not limit your individual diffuser design
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Minimize UV light
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Review to detect material absorption of UV light
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Maximize even light diffusion
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Review to detect material absorption and even distribution of light in direction of light therapy to the front of the lamp (such as
thickness of material, type of material, etc.) subject to the clear intent of the design aesthetics
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3 Wellness Lamp Base
A 3D model of the major components of the lamp base is provided in the Western Engineering Onshape application in the ES1050 24-25 class under documents (it will also be part of your Diffuser design assignment on http://westernengineering.onshape.com).
Groups will have access to fabricated bases along with calipers to review and measure during lab sessions. Students should note that there will be minor variations in the fabrication of each unit due to limitations of the fabrication or assembly and should plan their own designs accordingly.
4 Deliverables
Each student shall submit their individual diffuser design 3D. This is an individual assignment. Students need to create their design in the assignment posted on http://westernengineering.onshape.com and then submit a model link and some screenshots to Gradescope for grading. By accessing the assignment through the Onshape assignment, students will be start with an Onshape document preloaded with the base component parts. You should see the parts shown in the image to the right pre-existing in the model you are building your diffuser in.
Figure 2: Lamp Base Parts
Students are expected to:
• Model their own Diffuser (following good modelling practices and satisfying the objectives and constraints listed above)
• Create an assembly fastening all the base components provided in their nominal locations as modelled
• Add their diffuser to the assembly demonstrating how it is mounted to the Lamp Base
• And fasten it in place using an 6mm M3 screw imported from the Standard Content library included in Onshape (see Figure 3 below for illustration of how to add in standard content models).
Figure 3: Inserting standard content in Onshape Assemblies
The Group diffuser design will not be submitted for grading now but will be submitted for 3D printing in Week 7.
4.1 Submitting Diffuser Model
Gradescope assignment link:https://www.gradescope.ca/courses/18379/assignments/98570 .
1. Click the Submit button to the right of your model title on the Onshape modelling webpage (top right in this image). Do NOT close the Onshape modeling tab or navigate away as you will need to get a link to share with us as well from this website for Step 2!
Note: the button changes to Resubmit once successfully submitted:
2. Copy and submit to Gradescope Q1 the html link showing in your browser immediately AFTER clicking submit (and while it still shows “Resubmit”).
Note 1: you are copying the correct link if you see the word “submission” to the right of your title.
Note 2: if you missed the link then click on the icon highlighted in yellow in the immediately above image and select the most recent “Submission” model document from the list and then recopy the link in your browser bar.
Table 3: Phase 1 & 2 Lab Schedule
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Week Expected Elements
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Phase 1
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3
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Develop team charter, set up OneNote, familiarize yourselves with the project details, and start to ideate value added.
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4
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Start to ideate diffuser designs individually and share with group to inspire variations.
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5
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Translate individual diffuser design to Onshape (reverse engineering) and identify assumptions and risks for your solution.
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Phase 2
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6
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Share final individual diffuser designs with group, evaluate to identify top solution (or combined solution) and finalize top solution design in Onshape.
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7
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Develop individual and group 3D diffuser slicer printing model in PrusaSlicer and submit group file for 3D printing.
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5 Individual Diffuser Rubric
Due 9pm, Oct 21st. A base score for the diffuser design will be awarded for satisfying the following design requirements:
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Marks Requirement
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1
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Correct submission to Western Engineering Onshape and Gradescope
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1
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Maximum height 110mm above the base
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2
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Profile does not hang over the base (width and depth of top view)
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2
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Sufficient clearance inside diffuser to avoid interfering with the lighting and wiring components included in the tower
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2
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Diffuser design shows: (0) no, (1) some, or (2) significant effort to be aesthetically pleasing
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2
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Diffuser design is likely to: (0) not block UV and unevenly distribute light, (1) partially block UV and uniformly distribute light, or (2) block UV and uniformly distribute light towards viewer
observing the front of the lamp
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2
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Ensure proper orientation/front of the diffuser is clearly obvious during assembly
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3
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Assembly model illustrating the completed lamp includes all the provided base components and your diffuser part(s) properly assembled using an imported M3 6mm screw part
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Marks will be deducted for poor modelling practices used while creating your Diffuser designs:
• Sketches
o Sketch name(s) not representative of what was modelled in it – Sketches should not be left as default Sketch #
o Sketch(es) that are not fully defined (black lines only) and show blue lines or red (over-defined)
• 3D Features
o Features are not done logically, e.g. many individual chamfers instead of one chamfer applied to multiple edges in one operation
o Features that aren’t named logically (if you extrude a rod, then call it a rod extrusion.)
• Parts
o Any parts that are not solids and are instead hollow or shells
• Mates
o The assembly must have the main Base component fixed, so it doesn’t slide around when dragging on components
o All mates should be named so it is clear what is being mated to what and the nature of the mate