Glorious Nation of using ComputerAided Design Digital Fabrication and Rapid Prototyping charles z guan dragoncon 2016 robotics amp makers track Maker Resources A primer on modern resources available to the mechanical hobbyist with emphasis on making better devices through compu ID: 639411
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Maker ResourcesHow to Make Better Glorious Nation of using Computer-Aided Design, Digital Fabrication, and Rapid Prototyping
charles z. guan
dragon*con 2016 robotics & makers trackSlide2
Maker ResourcesA primer on modern resources available to the mechanical hobbyist, with emphasis on making better devices through computer-aided design and engineering and accessible digital fabrication resources.Design itWhy design before you build it? Computer Aided Design software : Mechanical, ElectronicFab itUsing your CAD output for digital fabrication processesMaking the 3D from the 2D and machine design techniquesSource itIndustrial, hobby, and maker-oriented vendors
Read itBuild blogs, Instructables, index sites
charles z. guan
dragon*con
2016
robotics & makers trackSlide3
Engineering hobbyist since 2001 Dragon*Con attendee since 2002, competed in Robot Battles since 2003 Mobile projects (robots, electric vehicles) MIT Mechanical Engineering 2011BattleBots 2015-2016 (ABC)About Me
charles z. guan
dragon*con 2016 robotics & makers trackSlide4
Everyone builds something like this at least once…charles z. guan
dragon*con 2016 robotics & makers trackSlide5
Why CAD?BeginnerDraw shapes, sketch your ideas, make templates to cut out parts manuallyIntermediate
Create 3D mechanical parts, mate and simulate motion, export digital fab files, technical drawingsAdvancedFully integrated 3D models including wiring harnesses, fluidic systems. Flow simulation, injection molding simulations. “Computer Aided Engineering”
charles z. guan
dragon*con
2016
robotics & makers trackSlide6
Design it: Mechanical CADFree:Autodesk Fusion 360 Best feature set currently.OnShape – Cloud freeCAD – OS, being developedNot So Free:Solidworks (student license) $150Autodesk Inventor (student license)Free 3yr with .edu or other affiliationRhinoceros (25-save trial)
Not even 3D: Inkscape, Corel, Illustrator
charles z. guan
dragon*con
2016
robotics & makers trackSlide7
Design it: Electronics CAD
Eagle (commercial w/ hobby license)
Free version lets you design up to 4 x 3” boards, 2 layersKiCAD (os)Well-featured open source with large community and expanding featuresFreePCB (OS)Fritzing (OS) – more novice focusedDipTrace , Altium…Vendor-specific (ExpressPCB, PCBArtist...)Fabrication services No schematic design, just layout
charles z. guan
dragon*con
2015
robotics & makers trackSlide8
Fab It: Rapid Prototyping and Digital Fabrication
Digital Fabrication
A family of computerized processes making (generally) 2D shapes using a dedicated machine with a single toolRapid PrototypingA family of techniques used to quickly move from concept to functional prototype, which can be used to iterate designs quicklyNow available at dealers near you!
charles z. guan
dragon*con
2016
robotics & makers trackSlide9
Fab It: Laser Cutting
High-powered laser (30 - > 1000+W burns away material selectively.Highly versatile – from paper to shipyards
Usually wood, plastic, but also metalsSome materials cannot be cut using this processMost accessible Vendors:Big Blue Saw (hi Simon!)PololuPonoko
charles z. guan
dragon*con
2016
robotics & makers trackSlide10
Fab It: Waterjet Machining
A high-pressure (60,000+ PSI) water stream with abrasive mixed inCuts very thick metals, pre-hardened metals like tool steel, stone, glass (
untempered), ceramic…“Exotic” process, now becoming accessibleVendorsBig Blue SawWhyachi
charles z. guan
dragon*con
2016
robotics & makers trackSlide11
Fab It: 3D Printing
Stacking layers of 2D prints to make a 3D project. Common techs:FDM / FFF Lays down noodle
of plasticSLA / Stereolithography Cures a goo via focused laser or scanned UV imageSLS / Selective Laser Sintering. Melts powder together with large laserLow cost market is developingVendors:Shapeways3DHubsSculpteo
charles z. guan
dragon*con
2016
robotics & makers trackSlide12
Fab It: Making 3D from 2D
Availability of 2D processes plus some creativity on your end = robust 3D machinery without touching a single machine tool
Adaptation of woodworking techniques and sheetmetal working techniquesGussets, trusses, I-beam, web-and-flange Mortise and tenon joints (“slot and tab”) “T-nut, Pettis Joint, etc.” fastening.How to Build Your Everything Really Really Fast: Written for MIT Mech. E. students, generally useful
charles z. guan
dragon*con
2016
robotics & makers trackSlide13
Fab It: Making 3D from 2D
Using stock & purchasable industrial components with 2D plate design means more structures are possible
80/20 T-slot extrusion Many accessories availableSpaces, standoffs, threaded rods3D printable “corner joists” and “angle blocks”
charles z. guan
dragon*con
2016
robotics & makers trackSlide14
Helpful Online Resources
Mekanizmalarwww.mekanizmalar.com
Many mechanisms explained, live applets and demos e.g. 4-bar linkage simulatorFalstad Circuit Simulator falstad.com/circuitEasy to use electronic circuit simulator (think SPICE software)Most types of components available, geared towards logic & analog circuits
charles z. guan
dragon*con
2016
robotics & makers trackSlide15
Helpful Online Resources
charles z. guan
Roymech.co.uk
Excellent resource for learning about mechanical parts
and
machining processes
Engineeringtoolbox.com
Online engineering repositories
Calculators for bearing loads, wire gauges, drills and tap charts,
ec.
dragon*con
2016
robotics & makers trackSlide16
Read it: Resources for Learning
Reading and looking at other peoples' builds is one of the best ways to discover new methods and resources!
Builders' blogs: etotheipiplusone.net – Charles' site. Sidebar links to many more sites.Hacking/Modding websites:hackaday.com, hackedgadgets.com, blog.makezine.com, Adafruit BlogGenerally link to builders' sites if they are availableBooksMaking Things Move: DIY Mechanisms… Dustyn RobertsMake Magazine and
Maker
Faires
Atlanta Mini Maker Faire
Instructables.com
Step-by-steps
, guides, instructional
videos.
charles z. guan
dragon*con
2016
robotics & makers trackSlide17
Q&A and DiscussionCAD program demonstrationsResources and Purchasing
CAD allows you to plan ahead, see how things will fit and move.
More resources than ever are available to the non-machine-endowed public with just a little bit of computer skillsDigital fabrication resources turn a virtual model into real parts with little manual intervention or steep machine operation learning curve (and access)The Internet is full of things which you can buy!
Major LessonsSlide18
Source it: Beyond Home Depot
charles z. guan
McMaster-Carr Supply (mcmaster.com)
Pretty much the end-all, be-all of mechanical parts and tools. Downloable CAD models for most fasteners, power transmission products.
Link-rich website, easy navigation and searching by specification
dragon*con
2016
robotics & makers trackSlide19
Other industrial suppliersMSC (mscdirect.com)Tools and machineryGrainger (grainger.com)HVAC and industrial process control, contractor suppliesFastenal (fastenal.com)Hardware, tools, bits and cutters, joiningWorse websites, customer service
Source it: Materials and Mechanical Parts
charles z. guan
dragon*con
2016
robotics & makers trackSlide20
Source it: Materials and Mechanical Parts
DigiKey
One of the largest electronic component suppliers, for DIY circuits and boards. Search by specifications. Although not the largest, it is very popular with hobbyists due to its relatively easy to use website.findchips.com and octopart.com For cross-vendor searching of a specific part.
charles z. guan
dragon*con
2016
robotics & makers trackSlide21
Source it: Materials and Mechanical Parts
Materials and metalsOnlinemetals (onlinemetals.com)Onlinemetalsupply (onlinemetalsupply.com)
Speedy Metals (speedymetals.com)eBay Search by alloy, size, and descriptors “Plate” “Sheet” “Bar”Interstate Plastics (interstateplastics.com)
charles z. guan
dragon*con
2016
robotics & makers trackSlide22
Source it: Did Someone Say Ebay?
eBay is one of the most underestimated resources for builders, but it must be used cautiously.Many keyword permutations
Sort by distance – don’t accidentally order from China and wait 5 weeks because you sorted by Price Lowest.Cross-check found parts with actual vendors to compare prices and shipping optionsShipping might be 90% of the parts cost (fee dodging!)
charles z. guan
dragon*con
2016
robotics & makers trackSlide23
Source it: Materials and Mechanical Parts
Surplus Center (surpluscenter.com)Most mechanical parts (chains, gears, shafts, collars, hubs), not so many beltsSemi parts, farm equipment
DC motors and gearmotorsSurplus parts might not be to all your specifications, but they could be cheaper.AllElectronics, Goldmine ElectronicsElectronics and small mechanical surplusAmerican Science and SurplusElec & Mech surplus and hobby/craft suppliesOther “surplus sales” websites – search!
charles z. guan
dragon*con
2016
robotics & makers trackSlide24
charles z. guan
Source it: Motors and Actuators
Robot Marketplace
: Centralized vendor for most robot and electromechanical projects
Brush DC motors, chain-belt-gear, batteries, etc.
Created by a former
Battlebots
competitor; many products are geared towards larger robots, but there are many products for very small hobby robots.
HobbyKing
: Brushless motors, lithium batteries
Geared towards R/C models
Motors can be repurposed for other applications such as vehicle traction, generators.
Inexpensive lithium ion battery packs and chargers
dragon*con
2016
robotics & makers trackSlide25
charles z. guan
Source it: Motors and Actuators
FIRST Robotics
vendors
Nationwide secondary school robotics program now has a network of vendors officially supporting it (I know, right?)
Inexpensive mechanical parts “Built to last the season”…but cheap.
AndyMark
Vex Pro
West Coast Products
Effective source of power transmission products (chains, belts, shafts, gears, bearings, actuator parts…)
dragon*con
2016
robotics & makers trackSlide26
Source it: Motors and Actuators
Small Robot VendorsPololu: Very small DC motors and gearmotors
for little robot drives. Motor controllers and other control electronics. Robot kits and frames.Solarbotics: Similar market to Pololu.Trossen Robotics: Another general hobby robotics vendor with a wide selection of small and medium size motor controllersServoCity: Anything to do with R/C servos used as robot actuators. Many different styles of hubs and adapters. FingerTech Robotics: Small hobby robot parts; motors, wheels, in-house designed controller and power switches
charles z. guan
dragon*con
2016
robotics & makers trackSlide27
Source it: Controls and Sensing
Sparkfun ElectronicsEstablished supplier of hobby electronics and supplies. Part of the open-source hardware community.
Many different types of sensors – accelerometry and inertial, touch, buttons, pressure, temperature... with “breakout” boards for hard-to-use componentsMicrocontroller development kits. More Arduinos than your body has room forTutorials on EAGLE, surface mount soldering, programming in C, etc.
charles z. guan
dragon*con
2016
robotics & makers trackSlide28
Source it: Controls and Sensing
Seee(eeeeeeeeeeeeeeeeee)dStudio
Chinese “bazaar” of DIY/maker oriented electronics productsParts, PCB fab services, PCB assembly, 3D printing services, even production and drop-shipping. Like many Chinese mass vendors, products are usually functional but could be hit-or-miss
charles z. guan
dragon*con
2016
robotics & makers trackSlide29
Source it: Controls and Sensing
charles z. guan
Source it: Controls and Sensing
Adafruit
Industries
Many hobbyist/maker contributed kits and open source products
Arduino
products and development boards
Wearable electronics development
products
Tutorial system for basic and intermediate electronics skills (
Adafruit
Learning System)
dragon*con
2016
robotics & makers trackSlide30
Source it: Printed Circuit Boards
charles z. guan
OSH Park, Seee(eeee)dStudio
- batch PCB service. Typically for small boards. Very low cost ($5 / in²)
PCB
way
/ 3pcb
–
one of many low-cost Chinese PCB printers and assembly houses.
Inexpensive 1-week turnaround time, very inexpensive standard svc.
Advanced Circuits
(4pcb) – American, Typ. 1 week end-to-end
“$33 Each” deal; Student discounts; “barebones” service
Many others
dragon*con
2016
robotics & makers trackSlide31
Source it: Chinesium
charles z. guan
AliExpress, BangGood, DealExtreme, eBay Chinese Sellers…
Everything you could possibly imagine, extremely low prices
Longer lead times
More
artform
to use well – search term variety, misspellings, consumer product replacement parts
dragon*con
2016
robotics & makers track