Difference between revisions of "Prototyping Guide"

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= Mandatory 3D Printing for all SLDPs =  
= Introduction =  


All SLDP groups, except RAD groups, will be required to design and 3D print a one-color logo. All specifications outlined in the Logo specification section must be met. All groups may design and print a two-color logo to meet the mandatory 3D printing requirement and will receive extra credit for using two colors. Deadlines for this mandatory print are outlined in the deadlines section below.
== What is Prototyping? ==


Groups must submit a .STL file of a logo through the 3D Printing Submission portal by Benchmark A and receive approval from a ProtoLab TA by Benchmark B. '''<span style="color: red;">The printed logo is a requirement for commissioning, and failure to do so will result in point penalties on the project grade.</span>'''
It’s in the name itself – “Proto” meaning “early” and “type” meaning “thing.” A prototype is an early version of the product that is made cheaply and efficiently to prove that your idea actually works (we call that “proof of concept”). You don’t want to waste money making something useless.  


= Mandatory 3D Printing for HIR =  
== “Ideation” and “Brainstorming” ==


For all students working on the Housing & Innovation in Revit (HIR) project, there will be an additional mandatory 3D print required for commissioning. Groups must submit a .STL file of a single floor plan through the 3D Printing Submission portal and receive approval from a ProtoLab TA by '''Benchmark B'''. The printed floor plan is a '''requirement''' for commissioning, and failure to do so will result in point penalties on the project grade.
Before you get to the prototyping stage, you have to figure out what it is you’re making. This is the “Ideation” stage. A good strategy here is to start from your problem and work towards a solution. Ask yourself, “What’s an issue people are dealing with? Who is the underrepresented consumer? Where is there a gap in the market?” In fact, don’t just ask yourself, ask other people from diverse backgrounds with unique experiences. Do research to see what’s already out there. Look critically at the world around you.  
HIR projects will have two mandatory prints:
*One floorplan
*One single color logo (or an additional floorplan which will count as extra credit).  


Once you’ve answered the “what should it do,” '''prototyping''' answers the “How will it work?” (This can refer to the entire product or a specific mechanism within the product).


= 3D Printing Extra Credit =
A few key questions are:


For LEGO EV3 SLDP groups, 3D printing extra credit is awarded for designing a robot part, course modification, or two-color company logo in any CAD (Computer Aided Design) software of your choice and having it approved for printing by a 3D printing specialist in Protolab. For HIR groups, 3D printing extra credit is awarded for 3D printing more than one floor plan of the exterior of your building or designing a two-color company logo. For BMD and RAD groups, 3D printing extra credit can only be awarded for a two-color company logo. For VEX groups, 3D printing extra credit may also be awarded for an original design of the box part.  Your designs will then be printed on a first-come first-serve basis (if EG cannot print your design due to time or material constraints, you will not be penalized and still receive extra credit).
=== What conditions will my design experience? ===


= Specifications =
This includes temperatures, loads (tensions, compressions, shear forces), repetitive motion, friction, human interaction, contact with body parts, contact with liquids, rotations, and torque.


'''Logos:'''
=== What dimensions will my design need to be? ===


* Maximum material usage does not exceed 15 grams total
Does it have to be wearable? Does it have to stand on its own? Does it have to fit a mid-sized cat inside it?
* Can be one or two colors
**One color logos are mandatory for all SLDP groups except RAD
**Two color logos are extra credit for all SLDP groups except RAD
**Two STL files are required for two-color logos, submitted as a .zip file on the website
* Logos must be integrated with your project in some way:
** Pin worn during final presentation
** Attached to robot during commissioning video
*** Add provided Lego technic beam model to your part to allow it to be connected to your robot (in [https://eg.poly.edu/downloads.php|important important downloads] tab on the EG website)
* Must be original content
** Cannot simply be text on a geometric shape
* Must be .STL extension with correct scaling


=== What components will my design need? ===


[[Image:3D_Good.png|thumb|center|500px|Figure 1: Example of a good logo]]
This includes sensors, motors, microcontrollers, cameras, LEDs, LCD screens, micro-computers (like Raspberry Pi’s), speakers, and any and all electrical components which your physical design must house.  


=== And, most importantly, how much time and money do I have? ===


[[Image:3D_Bad.png|thumb|center|500px|Figure 2: Example of a bad logo]]
In EG 1004, you usually have three months and 100 dollars. This greatly impacts what you can reasonably use in your prototype.


== Design → Computer-Aided Design ==


'''Robot Parts:'''
CAD, or Computer-Aided Design, has two advantages: The first is to make neat, precise representations of a physical product before construction, which allows you to test the viability of a design before you break out the hack saw. The second is to generate files that can be 3D printed, laser cut, or CNC milled.


* Maximum 1 Color
It is also useful to use CAD software (like Fusion 360, TinkerCAD, Eagle, or Fritzing) to design and test the circuit that connects your components, and creates a neat, legible representation of it for reference.  
** Maximum print size (7 x 8 x 7 in) '''and''' material usage cannot exceed 300 grams
** If a part exceeds the maximum size, it <b>cannot</b> be split into multiple pieces for printing
** Object may not be touched after the robot has started to run
* Original Design
** Must be different from other groups’ submissions
** Will be judged by 3D printing TA’s and Professors
* Must have functional purposes and can help the robot in traversing through the course in some way; '''cannot be used for aesthetic purposes'''
* Must be .STL extension with correct scaling


An additional realm of CAD is Building Information Modeling software, also referred to as BIM. BIM software and facilitators (like Revit and AutoCAD respectfully) enable users to design, simulate, collaborate, and budget structures prior to implementation and construction.




'''Course Modifications:'''
== Creation → Manufacturing Methods ==


* Maximum 1 Color
Below you’ll find a list of possible manufacturing methods available to you. The ones you’ll use depend on the specifications of your design. For example, if it’s a housing unit made out of large, flat pieces, laser cutting might be the right method, because it’s primarily two-dimensional. If it’s a small, light device with a unique shape, 3D printing could be useful since it builds the model layer by layer out of polymer filament. If it needs to be heat resistant or undergo friction, CNC milling might be helpful because there’s a broader range of possible materials. If it’s bulkier but needs to be tough, woodworking is a viable option. Soft, flexible, cozy, and generally inviting? Try sewing.
** Can be printed in multiple parts; up to two Ultimaker buildplates (7 x 8 x 7 inches)
** Must be used as one part
*** Different printed parts must be assembled together
*** Printed parts cannot be taped or glued together
** Object may not be touched after the robot has started to run
* Original Design
** Must be different from other groups’ submissions
** Will be judged by 3D printing TA’s and Professors
* Must be .STL extension with scaling
** Submit as .zip file if has multiple parts


===Do I have to design everything from scratch?===


Don’t reinvent the wheel; plenty of components already exist (for example: water pumps, safety goggles, a large broom, an insulated mug, a succulent, pieces of foam pool noodles) that can be used in a prototype. This guide covers the manufacturing of original parts custom-made for the unique needs of your product.


'''Housing in Revit Models:'''
==To Solder or not to Solder, that is the question==


* One '''mandatory''' floorplan for commissioning
Soldering is a method of creating permanent connections within a circuit onto a flat protoboard. A soldered circuit is usually much more compact than one using a breadboard and wires for temporary connections. The components can be connected directly using much smaller lengths of wire or lines of conductive metal connections known as “track solder.” This is especially useful in wearable devices and other designs that need to be picked up and handled or moved around, where a temporary connection would be too fragile.
* Maximum two additional 3D printed floorplans for extra credit
* Maximum print size 7 x 8 x 7 in
** Wall height must be to scale with the floorplan
** If printing multiple floors, second and third floors must nest on top of first floor
*** Elevator shafts aligning, stairs aligning, etc.
* Original designs
** Must be different from other groups' submissions
* Must be .STL extension
**Refer to Revit How To Guide for assistance with STL conversion: https://manual.eg.poly.edu/images/7/78/Revit_How_To_Guide.pdf


VEX Box:
= General Tips =
* Can be 1 or 2 colors
** Maximum print size (7 x 8 x 7 in) and material usage cannot exceed 300 grams
** If a part exceeds the maximum size, it cannot be split into multiple pieces for printing
** Object may not be touched after the robot has started to run
* Original Design
** Must be different from other groups’ submissions
** Will be judged by the proto
* Must be .STL extension with correct scaling, with separate files submitted as a .zip for 2 color prints
* Can be made using other manufacturing means such as laser cutting but must meet the size constraints previously mentioned and must receive approval from a protolab TA.


*Have a plan. Know your dimensions, know your circuit diagram, know your needed components, and know your environments. 
*Research, research, research.
*Be ready and willing to learn.
*Start with the simplest solution first.
*It’s okay to pivot. Sometimes the original design will hit snags nobody could anticipate. Adapt, find a new approach, go back to the ideation stage if you need to.
*It’s an iterative process. Things will probably never work the first, second, or third time.
*If you get stuck, don’t be afraid to reach out to other people.
*Have fun and be yourself.


= Software =
= Manufacturing Methods =
The primary manufacturing processes available to EG 1004 students are listed below:


To design your logo you will need any CAD software as well as CURA. There are many options for software that can be used, the only necessary feature is that the software can export files as an STL (stereolithography) extension. Some examples of these pieces of software are:
{| class="wikitable"
|+ Available At EG1004 Protolab/Open Lab
!Name!!Advantages!!Disadvantages!!Requirements
|-


* Autodesk Fusion 360 – Free student edition
|style="text-align: left;"|[https://www.hubs.com/knowledge-base/what-is-fdm-3d-printing/ Basic 3D Printing (FDM)] (PLA is the default which is hard and inflexible, TPU, which is more rubbery and bendable, is available upon request)||style="text-align: left;"|<b>Advantages</b>: cheap, relatively easy to learn, freedom of design in shape||style="text-align: left;"|<b>Disadvantages</b>: plastic material, precision of about 0.5 mm realistically, designs built layer by layer from single extrusion onto a plate so be mindful of holes, overhangs||style="text-align: left;"|Print must be approved by Protolab TAs
* Autodesk Inventor – Free student edition
* 123D – Free (Online)
* TinkerCAD – Free (Online)
* Blender – Free (Open source)
* OpenSCAD – Free (Open source)
* Solidworks – Available in NYU computer labs
* Rhinoceros – Free for mac


|-


To make a 2 color design you will need to save your logo in two separate STL files (one for each color) and submit both as a .zip file to the website. The two files are then imported into CURA and aligned, with separate extruders selected for each color.
|style="text-align: left;"|[https://www.makerspaces.com/how-to-solder/ Soldering]||style="text-align: left;"|<b>Advantages</b>: Permanent connections, neater, compact circuit, durability/longevity||style="text-align: left;"|<b>Disadvantages</b>: Difficult to undo once soldered, errors can lead to unusable circuit or damaged components||style="text-align: left;"|Additional Training from EG1004 Open Lab required


|-
|}


= Design Considerations =
{| class="wikitable"
|+ [https://makerspace.engineering.nyu.edu/training-and-reservations/ Available at Makerspace]
'''Must be approved by RAD Mentor and submitted via request form on EG website. Access to Makerspace tool requires [https://makerspace.engineering.nyu.edu/orientation/ General Safety Orientation]'''
!Name!!Advantages!!Disadvantages!!Requirements
|-
|style="text-align: left;"|Basic 3D Printing – PLA available, TPU available, Water soluble support PVA available||style="text-align: left;"|<b>Advantages</b>: See description above, no protolab approval needed, opportunity to operate a 3D printer independently||style="text-align: left;"|<b>Disadvantages</b>: See description above, strict time limits at the MakerSpace, no one will retry your print if it fails unlike in the protolab||style="text-align: left;"|Only MakerSpace Safety Training and Introduction required (this training is an EG1004 course requirement)


* Make a flat bottom: A large flat bottom increases the adhesion between the build platform and the part, keeping the part from shifting around during a print.
|-
* Keep overhangs close to 45 degrees: Each layer of a 3D print needs to be supported from below. You can avoid adding additional supports to a print if all the overhanging parts are at no more than a 45 degree angle from vertical.
* Avoid thin walls and thin columns: Thin walls and column often do not come out well. The thickness of a thin wall should be a multiple of 0.35mm. Thin columns will usually come out distorted because they melt under the nozzle.


|style="text-align: left;"|[https://www.thesprucecrafts.com/getting-started-in-woodworking-3536535 Woodworking]||style="text-align: left;"|<b>Advantages</b>: Toughness, creative freedom, no need for software or machinery||style="text-align: left;"|<b>Disadvantages</b>: Slack of precision, limitations in possible shapes, possibility of injury||style="text-align: left;"|Training recommended for power tools but not mandatory; No reservation needed; material may need to be purchased


= Submission and General Guidelines =
|-


* Submission of your 3D designed parts will take place through the EG website using the “3D Printing Submission” tab of the left menu. '''DO NOT USE THE NORMAL SUBMISSION TAB.''' Your submissions must be .STL files or .zip files.
|style="text-align: left;"|[https://wp.nyu.edu/nyushanghai-fabrication-lab/singer-sewing-machine-tutorial/ Sewing]||style="text-align: left;"|<b>Advantages</b>: Good life skill, fabric use, flexibility, done by hand||style="text-align: left;"|<b>Disadvantages</b>:  can be difficult to learn, harder to design/represent in CAD.||style="text-align: left;"|Training recommended for machines but not mandatory; no reservation needed; material may need to be purchased; (scrap is usually available for free)
* If your logo has two colors, you must compress your two STL files into a .zip file for submission.
* Make sure to submit an STL with the '''correct scaling.'''
** If you choose to build your model in inches, remember to '''convert to millimeters''' before saving the STL
* After your submission has been received, stop by the Modelshop to work with a ProtoLab TA at your earliest convenience. This process is '''necessary''' for your files to be approved and printed.
* Once your design has been approved, you can choose to print it at the EG ProtoLab or self-print it at the MakerSpace. However, if you choose to self-print, '''it must be first approved by a ProtoLab TA, and the final printed part must be shown to a ProtoLab TA to receive extra credit.'''
* When you pick up your print, you will receive a “Proof of Approval” that recognizes the validity of your print. '''Please keep the slip with your printed part at all times - you will not be allowed to use the printed part unless the slip is present.'''
* As you are submitting your 3D designs for your logos, course modifications, or robot parts, please keep in mind the requirements posted on the EG Manual. If you have any further questions, please stop by the Modelshop and inquire a ProtoLab TA.
* RAD/BMD/VEX: Prototyping TAs will have the final decision over whether or not a part should be 3D printed or manufactured using another method. Also, while some parts submitted for 3D printing may be taken from preexisting designs online, your end result should still be an original design in order to not violate NYU’s academic honesty guidelines.


|-


|style="text-align: left;"|[https://www.hubs.com/blog/laser-cutting/ Laser Cutting]||style="text-align: left;"|<b>Advantages</b>: works for larger scale pieces than 3D printed designs, strong and rigid, precise.||style="text-align: left;"|<b>Disadvantages</b>: limited to 2D, may require Adobe Illustrator||style="text-align: left;"|Requires additional training; material sheets may need to be purchased; Reservation needed for machines


= Deadlines =
|-


* '''Initial STL file submission is due by Benchmark A (week of 3/2)'''
|style="text-align: left;"|[https://www.hubs.com/knowledge-base/what-is-sla-3d-printing/ Advanced 3D Printing (SLA)]||style="text-align: left;"|<b>Advantages</b>: very precise, durable resin material, uses a laser which allows for intricacies in shapes without the need for support/adhesion layers||style="text-align: left;"|<b>Disadvantages</b>: More expensive, harder to operate, often unnecessary depending on the complexity of the design||style="text-align: left;"|Requires additional training; material bricks may need to be purchased; Reservation needed for machines
** The 3D printing process can take multiple revisions, you are required to submit the first attempt by Benchmark A, but you will be allowed to make any modifications until the final deadline of Benchmark B. If you miss the Benchmark B deadline, subsequent submissions will not be considered.
* '''Final STL approval is due by Benchmark B (week of 3/30)'''
** No further submissions will be considered after this date for extra credit prints
** All submissions must be approved by this deadline
*** Exceptions applies to mandatory prints -
**** '''Mandatory prints will be allowed to receive approval only for a one-color logo, with a penalty on Benchmark B for not meeting the deadline ''' 
* '''Printed part by Commissioning Deadline (week of 4/27)'''
* If you choose to self-print your design, you must first receive approval by the Benchmark B deadline and then '''return to the ProtoLab with your printed part to receive the Proof of Approval Form by the <span style="color: red;">Final SLDP Submission date (week of 4/27).</span>'''
** <span style="color: red;">You will not be able to Commission without a signed Proof of Approval Form</span>
* '''These deadlines are applicable to mandatory HIR prints, mandatory logo prints, extra credit prints fulfilling the mandatory logo print requirement, and all SLDPs extra credit prints'''
** Extra Credit floor-plans for HIR are subjected to the extra credit deadlines detailed above


|-


= ProtoLab Schedule =
|style="text-align: left;"|[https://www.minimillr.com/cnc-routing-process/ CNC Routing] & [https://www.hubs.com/knowledge-base/cnc-machining-manufacturing-technology-explained/ CNC Milling]||style="text-align: left;"|<b>Advantages</b>: Subtractive, not additive, can use metals and waxes, able to do PCB (Printed Circuit Board) manufacturing||style="text-align: left;"|<b>Disadvantages</b>: Additional software skills (Eagle), more expensive||style="text-align: left;"|Requires additional training; material bricks may need to be purchased; Reservation needed for machines


* Monday, Tuesday and Friday 12PM to 6PM
|-
* Wednesday and Thursday 2PM to 6PM
|}
 
= Example Projects =
 
The following projects are example uses of what one can manufacture using CAD and some of the methods discussed above.
 
[[Image:Example_Project_1.png|600px|thumb|center|Servo Connector (Left), LCD Screen Holder (Right) Former EG Students]]
 
These are devices designed to hold electrical components and attach them to the rest of the build.
 
[[Image:Example_Project_2.png|600px|thumb|center|Stepper Arm (Left), Wrist Device (Right), Former EG Students]]
 
These are designs that interact with the surrounding environment. On the left is a swiping arm attached to a stepper motor which can rotate and provide a delicate push. On the right is a unit molded to the shape of a human wrist. The slits on the side are for fabric straps to secure the unit onto the user.
 
[[Image:Example_Project_3.png|600px|thumb|center|Claw (Left), Curtain (Right), Former EG students]]
 
The claw uses both 3D printed parts and standard screws, nuts, and bolts as connectors. The curtain has a woodworked (sawed and screwed) unit with 3D printed attachments.
 
[[Image:Example_Project_4.png|500px|thumb|center|Lasercut Housing Unit, Former EG Student]]
 
This is a unit assembled using laser cut parts; the holes in the top are for wires and sensor connections.

Revision as of 17:35, 20 September 2022

Introduction

What is Prototyping?

It’s in the name itself – “Proto” meaning “early” and “type” meaning “thing.” A prototype is an early version of the product that is made cheaply and efficiently to prove that your idea actually works (we call that “proof of concept”). You don’t want to waste money making something useless.

“Ideation” and “Brainstorming”

Before you get to the prototyping stage, you have to figure out what it is you’re making. This is the “Ideation” stage. A good strategy here is to start from your problem and work towards a solution. Ask yourself, “What’s an issue people are dealing with? Who is the underrepresented consumer? Where is there a gap in the market?” In fact, don’t just ask yourself, ask other people from diverse backgrounds with unique experiences. Do research to see what’s already out there. Look critically at the world around you.

Once you’ve answered the “what should it do,” prototyping answers the “How will it work?” (This can refer to the entire product or a specific mechanism within the product).

A few key questions are:

What conditions will my design experience?

This includes temperatures, loads (tensions, compressions, shear forces), repetitive motion, friction, human interaction, contact with body parts, contact with liquids, rotations, and torque.

What dimensions will my design need to be?

Does it have to be wearable? Does it have to stand on its own? Does it have to fit a mid-sized cat inside it?

What components will my design need?

This includes sensors, motors, microcontrollers, cameras, LEDs, LCD screens, micro-computers (like Raspberry Pi’s), speakers, and any and all electrical components which your physical design must house.

And, most importantly, how much time and money do I have?

In EG 1004, you usually have three months and 100 dollars. This greatly impacts what you can reasonably use in your prototype.

Design → Computer-Aided Design

CAD, or Computer-Aided Design, has two advantages: The first is to make neat, precise representations of a physical product before construction, which allows you to test the viability of a design before you break out the hack saw. The second is to generate files that can be 3D printed, laser cut, or CNC milled.

It is also useful to use CAD software (like Fusion 360, TinkerCAD, Eagle, or Fritzing) to design and test the circuit that connects your components, and creates a neat, legible representation of it for reference.

An additional realm of CAD is Building Information Modeling software, also referred to as BIM. BIM software and facilitators (like Revit and AutoCAD respectfully) enable users to design, simulate, collaborate, and budget structures prior to implementation and construction.


Creation → Manufacturing Methods

Below you’ll find a list of possible manufacturing methods available to you. The ones you’ll use depend on the specifications of your design. For example, if it’s a housing unit made out of large, flat pieces, laser cutting might be the right method, because it’s primarily two-dimensional. If it’s a small, light device with a unique shape, 3D printing could be useful since it builds the model layer by layer out of polymer filament. If it needs to be heat resistant or undergo friction, CNC milling might be helpful because there’s a broader range of possible materials. If it’s bulkier but needs to be tough, woodworking is a viable option. Soft, flexible, cozy, and generally inviting? Try sewing.

Do I have to design everything from scratch?

Don’t reinvent the wheel; plenty of components already exist (for example: water pumps, safety goggles, a large broom, an insulated mug, a succulent, pieces of foam pool noodles) that can be used in a prototype. This guide covers the manufacturing of original parts custom-made for the unique needs of your product.

To Solder or not to Solder, that is the question

Soldering is a method of creating permanent connections within a circuit onto a flat protoboard. A soldered circuit is usually much more compact than one using a breadboard and wires for temporary connections. The components can be connected directly using much smaller lengths of wire or lines of conductive metal connections known as “track solder.” This is especially useful in wearable devices and other designs that need to be picked up and handled or moved around, where a temporary connection would be too fragile.

General Tips

  • Have a plan. Know your dimensions, know your circuit diagram, know your needed components, and know your environments.
  • Research, research, research.
  • Be ready and willing to learn.
  • Start with the simplest solution first.
  • It’s okay to pivot. Sometimes the original design will hit snags nobody could anticipate. Adapt, find a new approach, go back to the ideation stage if you need to.
  • It’s an iterative process. Things will probably never work the first, second, or third time.
  • If you get stuck, don’t be afraid to reach out to other people.
  • Have fun and be yourself.

Manufacturing Methods

The primary manufacturing processes available to EG 1004 students are listed below:

Available At EG1004 Protolab/Open Lab
Name Advantages Disadvantages Requirements
Basic 3D Printing (FDM) (PLA is the default which is hard and inflexible, TPU, which is more rubbery and bendable, is available upon request) Advantages: cheap, relatively easy to learn, freedom of design in shape Disadvantages: plastic material, precision of about 0.5 mm realistically, designs built layer by layer from single extrusion onto a plate so be mindful of holes, overhangs Print must be approved by Protolab TAs
Soldering Advantages: Permanent connections, neater, compact circuit, durability/longevity Disadvantages: Difficult to undo once soldered, errors can lead to unusable circuit or damaged components Additional Training from EG1004 Open Lab required
Available at Makerspace Must be approved by RAD Mentor and submitted via request form on EG website. Access to Makerspace tool requires General Safety Orientation
Name Advantages Disadvantages Requirements
Basic 3D Printing – PLA available, TPU available, Water soluble support PVA available Advantages: See description above, no protolab approval needed, opportunity to operate a 3D printer independently Disadvantages: See description above, strict time limits at the MakerSpace, no one will retry your print if it fails unlike in the protolab Only MakerSpace Safety Training and Introduction required (this training is an EG1004 course requirement)
Woodworking Advantages: Toughness, creative freedom, no need for software or machinery Disadvantages: Slack of precision, limitations in possible shapes, possibility of injury Training recommended for power tools but not mandatory; No reservation needed; material may need to be purchased
Sewing Advantages: Good life skill, fabric use, flexibility, done by hand Disadvantages: can be difficult to learn, harder to design/represent in CAD. Training recommended for machines but not mandatory; no reservation needed; material may need to be purchased; (scrap is usually available for free)
Laser Cutting Advantages: works for larger scale pieces than 3D printed designs, strong and rigid, precise. Disadvantages: limited to 2D, may require Adobe Illustrator Requires additional training; material sheets may need to be purchased; Reservation needed for machines
Advanced 3D Printing (SLA) Advantages: very precise, durable resin material, uses a laser which allows for intricacies in shapes without the need for support/adhesion layers Disadvantages: More expensive, harder to operate, often unnecessary depending on the complexity of the design Requires additional training; material bricks may need to be purchased; Reservation needed for machines
CNC Routing & CNC Milling Advantages: Subtractive, not additive, can use metals and waxes, able to do PCB (Printed Circuit Board) manufacturing Disadvantages: Additional software skills (Eagle), more expensive Requires additional training; material bricks may need to be purchased; Reservation needed for machines

Example Projects

The following projects are example uses of what one can manufacture using CAD and some of the methods discussed above.

Servo Connector (Left), LCD Screen Holder (Right) Former EG Students

These are devices designed to hold electrical components and attach them to the rest of the build.

Stepper Arm (Left), Wrist Device (Right), Former EG Students

These are designs that interact with the surrounding environment. On the left is a swiping arm attached to a stepper motor which can rotate and provide a delicate push. On the right is a unit molded to the shape of a human wrist. The slits on the side are for fabric straps to secure the unit onto the user.

Claw (Left), Curtain (Right), Former EG students

The claw uses both 3D printed parts and standard screws, nuts, and bolts as connectors. The curtain has a woodworked (sawed and screwed) unit with 3D printed attachments.

Lasercut Housing Unit, Former EG Student

This is a unit assembled using laser cut parts; the holes in the top are for wires and sensor connections.