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Project Portfolio .pdf


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Jordan Briggs
Project Portfolio

Table of Contents
Rotary 3D Printer
Ink Filter Characterization
Wafer Adhesion Strength
Gear Box Fabrication
Supporting Documentation
Gear Box Frame Drawing
Leadscrew Motor Analysis
Senior Project Table Assembly

1
2
3
4
5
6
7

1
Rotary 3D Printer - “Additive Lathe”
Team: Jordan Briggs, Austin Jarvis, Stefan Soezeri, Jonathan Wagenet
Purpose:
Design and fabricate a rotating cylinder 3D printer which allows manufacturing of complex
cylindrical structures.
Objectives:
 Design and fabricate a 3-axis, 3D printer
 Utilize mechanical motion system based on
translational motion of printer head and
rotary motion of cylindrical printing surface
 Develop an appropriate printer head that
extrudes material of thickness 0.2-0.5mm
onto cylindrical printing surface
 Create cylinder print surface to be
adjustable and replaceable with cylindrical
printing surfaces up to 4 in diameter and 6
in in length
 Program motor control and control
interface
Contribution:
 Z-axis table:
o Design – SolidWorks
o Analysis – Lead Screw Motor Analysis
(Supporting Documentation)
o Sourcing
o Manufacturing – Haas CNC & 3D Printing
o Assembly
o Troubleshooting
 Motor control programming and troubleshooting

Z-Axis Table
(Assembly Drawing in Supporting Documentation)

2
Ink Filter Characterization
Summer Intern Project 1/2
Purpose: Characterize filter loading for R&D ink development project
evaluating filter candidates to guide print head modifications for titanium
white ink.

Contribution:
 Characterized loading conditions using
standard filter testing
 Designed a 3D printable model that
mimics Falcon print head geometry
 Programmed Arduino driven test
fixture to simulate printing flow
conditions
 Integrated sensors into test fixture to
gather and analyze data during testing
for real time feedback on filter loading
 Collaborated with Barcelona office to
qualify the test fixture before end of
internship

8.0
7.0
6.0

Filtration Rate (g/min)

Objectives:
 Understand filtering loading behaviors
for new R&D ink
 Characterize ink flow using standard
filter loading model
 Develop new filter loading test for use
in future ink developments

5.0
4.0
3.0
2.0
1.0
0.0
0

100

200

300

400
500
Filtered Volume/g

600

700

800

Loading Using Standard Filter Testing

Test Fixture Flow Diagram

Falcon Print Head

3D Model Simulating
Falcon Internal Geometry

3
Wafer Adhesion Strength Innovation
Summer Intern Project 2/2
Purpose: Evaluate and characterize adhesion strength of singulated chips with
silicon nitride and tantalum backing off of a silicon wafer
Problem:
 Removal of die from the wafer results
in 3-5% failure due to chip cracking
 Die removal machine had no
capability to measure removal force,
was very difficult to access for tooling
and was in an active manufacturing
line
 Silicon nitride wafers cause print
head failures due to particulate
matter so tantalum backed wafers
are preferred
 The adhesion characteristics for
silicon nitride vs tantalum needed to
be understood to mitigate chip
cracking when the switch is made
Solution: Pixel Density Analysis
• Allows for dies adhesion to be
measured while still attached
• Example shows 67% no
adhesion (light blue) 21%
adhesion (dark blue) and 12%
for the nozzle slots
• Roughly 76% adhesive removed
and 24% of adhesion remains
for the given sample
• No force values for die release
but a comparison based on
adhesion percent removed was
made
• Automated
pixel
density
analysis with a script

Wafer with defective chips leftover for testing

4
Gear Box Assembly
Team: Jordan Briggs, Andrew Magnasco, Austin Jarvis
Purpose: Design and fabricate a worm gear
transmission device through CAM for a graduate
level course
Objectives:
 Create a model worm gear transmission
device out of acrylic stock pieces
 Utilize the Haas CNC while optimizing
machining operations to minimize cycle
times
 3D print any fasteners necessary
Contribution:
 Modeled screws, side covers, top cover,
and gear box housing (Supporting Documentation)
 Created ESPRIT machining program to
manufacture the acrylic side covers, top
covers, and housing using a Haas CNC
 Operated
Haas CNC machine to
manufacture pieces
 Fine-tuned 3D printing parameters for
acceptable fastener threads

5

6
Leadscrew Motor Analysis
Find: Maximum loading on the table
Assumptions:
 Force exerted on the motor from the table will be in z direction
o Linear guide rods ensure motion is one dimensional
 Manufacturer motor specifications are accurate
Variables:
𝑻𝒓𝒂𝒊𝒔𝒆 = torque required to raise load (𝒌𝒈 ∙ 𝒄𝒎)
𝒅𝒎 = mean diameter (𝒄𝒎)
𝝁 = coefficient of friction
𝒄𝒎
𝒍 = lead (𝒓𝒆𝒗)
𝑭 = load on one screw (𝑵)

Given:
𝑻𝒓𝒂𝒊𝒔𝒆 = 𝟑. 𝟕 𝒌𝒈 ∗ 𝒄𝒎
𝒅𝒎 = 𝟎. 𝟖 𝒄𝒎
𝝁 = 𝟎. 𝟏𝟖
𝒍 = 𝟎. 𝟖

𝒄𝒎
𝒓𝒆𝒗

Equations:
𝑻𝒓𝒂𝒊𝒔𝒆 =

𝑭𝒅𝒎
(𝒍+𝝅𝝁𝒅𝒎 )
𝟐



𝝅𝒅𝒎 −𝝁𝒍

𝑭 = 𝟐 ∗ 𝑻𝒓𝒂𝒊𝒔𝒆 ∗

𝝅𝒅𝒎 − 𝝁𝒍
𝒅𝒎 (𝒍 + 𝝅𝝁𝒅𝒎 )

Calculation:
 Final weight of the assembly is near 10 lbs
 Max load is the double the maximum loading because there will be two lead screws
𝑴𝒂𝒙 𝒍𝒐𝒂𝒅 = 𝟑𝟓 𝒌𝒈
Comments:
There will be no issue with holding torque on our lead screws.

7


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