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title: Laser Cutting   --Week 6--
description: Accessibility
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# Welcome to the Future of Access Technologies

Week 6, Brief Intro to Laser Cutting

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# Important Reminder

## This is an important reminder
## Make sure zoom is running and recording!!!
## Make sure captioning is turned on

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[//]: # (Outline Slide)
# Learning Goals for today
- Introducing your next assignment
- Brief introduction to Laser Cutting 
- Actually preparing an item to laser cut

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# Next Assignment (1/3)

1) Pick something you've implemented
- Prefarably interactive (some sort of web or app based user interface)

2) Pick a task to complete on it

Reach out if you do not have an interactive tool
- Ideally do this before class
- We're trying to figure out whether we can spend any class time on this Friday, but don't count on it

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# Next Assignment (2/3)
3) Test it out with your accessibility technology
   - Be clear about which accessibility aid or perceptual concern you will be addressing

4) Fix the problem

.footnote[If do-able and you need to be re-evaluated, you may *additionally* use automated testing and generate more UARs]

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# Next Assignment (3/3)
6) Write a 1 page document describing what you did (please see the assignment for details on what is required

7) Make sure it is accessible, and not a PDF, and then submit it

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[//]: # (Outline Slide)
# Learning Goals for today
- Introducing your next assignment
- **Brief introduction to Laser Cutting**
- Actually preparing an item to laser cut

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# Some key things to know about Laser Cutting

We're using a [Glowforge](https://glowforge.com/). 
- It takes SVGs as input
- It can engrave, cut, etc
- We're providing plywood, 3mm thick [double check with calipers]
- We will not engrave during lab, it slows things down too much, but we may cut

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# What can you do?

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![:img Illustration of cutting scoring and engraving first with those words and then with stars. Cutting cuts a hole; Scoring outlines something; and Engraving burns it into the wood, 70%, width](img/3dprinting/laser-Cut-Score-Engrave.png)
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Cutting: Makes a hole. 
- Any line can be cut

Scoring: Doesn't cut all the way through. 
- Again, any line. Use a different color

Engraving: Burns. Can do greyscale.
- Images.  Make sure they're not too dark. 
- Add in a drawing program after Tinkercad
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# How we will create SVGS

First create a design in TinkerCAD (or other CAD software if you know it well)
- You should group everything together that is touching
- Place it carefully. The base plane will determine what is part of the final SVG
- We will not engrave during lab, it slows things down too much, but we may cut
- Export it as SVG (demo)
   - Include mm as units
- Re-export *with images emedded* if you add them   

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# Your process

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Measure thrice

Make an svg

Print it on paper

Cut it out and check your measurements AGAIN
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Decorate
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# Example: My bag holder

![:img Screenshot of a bagholder in tinkercad titled Mankoff Bag Hanger - V1, 30%, width](img/3dprinting/bagholder-tinkercad.png)


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# First print: On Paper

![:img Initial design printed on paper is about the size of a single finger, 30%, width](img/3dprinting/tiny.jpg)


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# Measuring

![:img Calipers stretch the width of four fingers and show a measurement of about 76mm , 30%, width](img/3dprinting/measuring.jpg)

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# Other Important Measurements

The amount of wood removed by the laser cutter as it burns through the wood.

Should always test for each new type of wood and wood thickness

[Instructable](https://www.instructables.com/How-to-Adjust-for-Wood-Thickness-and-Kerf-on-a-Las/) on how to do this

Only an issue if you're making a box or something else that has to assemble

Use calipers to measure! 

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# Reprinted on paper

Reason? I used 76mm for the *outer* dimension instead of the *inner* one!
![:img Another print on paper is still too small, 30%, width](img/3dprinting/measurement-error.jpg)

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# Final print

Do you see the problem with this design?<BR>
![:img A laser cut bag holder big enough for a hand!, 30%, width](img/3dprinting/first-print.jpg)



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# The End!

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# Other software options

[Adobe Illustrator](https://www.adobe.com/products/illustrator.html). Best for most tasks if you have it

[AutoCAD](https://www.autodesk.com/products/autocad/overview?term=1-YEAR&tab=subscription) (free for students). Probably overkill

[Inkscape](https://www.autodesk.com/products/autocad/overview?term=1-YEAR&tab=subscription) (free). Best free option