fChris has 69 post(s)

1.Cat Face Tutorial
Follow along with the Cat Face Tutorial to create your own MasterCAM file.

2. Install Parallels and Windows (if necessary) and MasterCAM
You are entitled to a free copy of Windows 10, which you can access from RISD’s “on the hub” store.
To install Windows on an Apple computer, we recommend using Parallels. For now, we recommend you start with the free trial. The free trial is only good for 14 days. When you are ready to purchase, you can get it from “on the hub”.

MasterCAM Home Learning Edition 2017 will be available from Marilyn on a USB key. You can borrow the key to drag a copy to your computer, then return it to her.

3. Name Plate – due Monday 4/2 at 9am!
Create a name plate for your self, to be executed in 1/2″ thick MDF on the CNC router. We will supply the material and will cut all of the names in one go. Some requirements:

• Students are required to draw the letters for their name plate as “single stroke” fonts
• The names will be cut with the following configuration
  • contour toolpath, with compensation turned off (cutting on the center of the line)
  • cut with the 1/4″ ball end cutter
  • cut to a depth of 1/8″
• The outside profile will be cut with the following configuration
  • contour toolpath, compensating to cut to the outside as a climb cut
  • cut with the 1/2″ flat-end cutter
  • cut depth of 1/2″
  • stepdown of 1/4″
  • four tabs at .75″ wide, .125″ thick (use Vertical Moves, NOT RAMP MOVES!!!)
• Name Plates must fit within a 9″ x 14″ rectangle

You will be required to submit a MasterCAM file and a Rhino file for this project. Use the Rhino file below as a template to fit your Name Plate within. Use the layers included in this file as follows:

• Place your name curves on the layer called “Name Curves”
• Place the outside contour on the layer called “Outer Profile Curves”

Name your Rhino and MasterCAM Files with the following convention: Firstname_Lastname_NamePlate
Place these files in your personal folder and the shared folder called “Name Plate”

Get the Template Here. The template includes sample curves for the name and outer profile. Delete these curves – don’t include them in the file you post the google drive.

4. Plywood Stool Phase 1
Working from the CNC Plywood Stool project brief, begin developing your design for this project. The primary deliverable for this phase is a 1:3 scale model. If possible, use a material that approximates the scaled thickness. You are welcome to use the laser cutter for this project, but be aware that only certain materials can be cut with this machine. Work iteratively, on-screen with Rhino, and off-screen with sketches and study models. Save all of your process work.
Create a folder in the shared google drive with your name and place in that folder:

1. a photo of your scale model named “FirstnameLastname_PlywoodScaleModel.jpg”
2. a screenshot or rendering of your rhino model named “FirstnameLastname_PlywoodModelRendering.jpg”
3. and an image of your nesting scheme for the parts named “FirstnameLastname_PlywoodNesting.jpg”

5. Drive Tidy-Up
Make sure your projects to date are properly organized in the google drive. Most projects require content is placed in both the shared drive and your personal folder. Look at back at the previous assignment to make sure your work is where it needs to be, following the specifications of the assignments. Failure to do so will affect grading.

Working from the provided Rhino file, build the form shown below (do not use the patch tool!)

Orthographic Views:

1. Paper Model Round 2 (final)
Revise your Rhino model as needed and create a final paper model for this project. This model should be a well crafted, carefully proportioned likeness of your chosen object, demonstrating thoughtful decisions about what to include as part of the form, what to represent with graphics, and how to abstract compound curving surfaces into simple, developable surfaces. Keep in mind that you are expected to include some representation of the color, materials, and finish of the original object – this can be very literal or more abstract in the way you make this representation. For now, focus on creating the model, but we will ask you to create a slideshow summarizing your work and process. Be sure that you are working in an organized fashion in Rhino as we will review the files.

2. Revisions
You may continue to revise and improve your work for the first two assignments.

Build a model of the toy boat indicated in the orthographic views found in this zip folder.

Start by building the hull:

If you finish with that, build the cabin shown in the orthographic drawings:

This video provides a nice overview of texture mapping in Keyshot

And related, is an introduction to labels

This video provides an in depth review of the “Unroll” command

You can download the model used in this video here.

If you’re looking for a review of the Make2D command that was covered in class, here’s a video that provides a quick refresher. FYI – this video isn’t mine – it’s from Polyplane.com

1: Mustard Bottle Tutorial
Follow along with the tutorial that shows how to build a mustard bottle. Try as best as you can to copy the rendering shown in the tutorial page.

2: Paper Model, Phase 1
Working from the Paper Model project Brief:

1. build a model of your object in Rhino
2. translate this model into developable surfaces
3. unroll the surfaces into a pattern that can be cut
4. revise and modify as necessary (add tabs, etc)
5. cut out this pattern in paper by hand from a printed pattern, with the laser cutter, or with the digital die cutter.
6. assemble
7. experiment with media as necessary to create a representation of the object’s materials

Place the following content into a new google drive folder called “Firstname Lastname Paper Model Phase 1”, put this folder in your personal folder and the shared folder for this project. In this folder, put the following images

1. a Keyshot rendering on a neutral background. Render the model used to generate your patterns using “toon” shaders to provide an impression of the color(s) your paper model will use
2. screenshot in orthographic view of your cut pattern – this screenshot should show your pattern as curves, not surfaces. The commands DupEdge, DupBorder, and DupFaceBorder will be helpful in getting curves from your unrolled surfaces.
3. photo of your assembled paper model

3. 3D Printing
If you haven’t already done so, submit one of your glasses for 3D printing. We are pushing back deadline for this part of the assignment.

4: Chair Study Revisions
Rebuild at least one of your chair models to more accurately capture the form and proportions of the physical examples. Think critically about the appearance of your model vs. what you see when looking at the chair. Use photographs as reference if necessary.

Re-render the chairs in a neutral setting, using only simple extrusions as the pedestals to create an unobtrusive environment for the rendering. The goal is to create a rendering that demonstrates competency creating near photo-realistic renderings of realistic looking image of a plausible photoshoot. Follow the specifications below:

• the armchair should be shown with an opaque black gloss paint, with natural caning for the seat and back
• one of the other chairs should be shown in an opaque satin paint finish, in either white or red
• one of the other chairs should be shown with a clear satin lacquer over natural wood
• use this image as your backplate
• use a smooth, opaque, matte or satin finish for the pedestals – choose white, gray, or neutral shades of colors.
• make sure “ground shadows” is turned on (environment tab)

You are also welcome and encouraged to continue revising your glasses, especially the renderings.

Download this PDF file which covers the steps to build the mustard bottle shown below.

Create a rendering of your completed bottle. You can use the the mustard image below as a texture map for the mustard, and the image of the label as a “label” in Keyshot.

You can download this file to follow along during the demonstration of surfacing tools.

Build a model of a sharpened wood “golf” pencil. Sample pencils will be distributed for inspection and measurement. First and foremost this exercise is about form, but proportions and dimensions are important too. Don’t worry about materials you can build this as if it was all one single material / piece.

In order to 3D print a model of one of your glasses, you will need to export it as an .STL file.

To do so you can follow these steps from Rhino:

1. make sure the object is a solid.  You can run the command “What” and if this tells you that the object is “closed” it is a sold. If it does not say it is cloed, you can run the command ShowEdges – this will allow you to display “naked” edges (edges that are not connected to another edge). If your model has naked edges, these are the edges that are open. If the opening is very small, the 3D printing software should be able to process your file successfully. The lab also has software that can “heal” small openings.
2. Select the object, and then run the command “Export“. This will allow you to save only what you have selected.
3. For the file format, choose .STL. Name your file and include your last name for easy reference in the 3D printing lab. Click export.
4. a simple control dialogue will appear. On Windows, look for the option for “Detailed Controls”, on Mac you will see a little downward facing triangle. Use the settings shown below to ensure your model translates to a high resolution print
   1. Density: 1
   2. Maximum Angle: 10
   3. Maximum Aspect Ratio: 6
   4. Minimum Edge Length: .0001
   5. Maximum Edge Length: 0
   6. Maximum Distance, Edge to Surface: .01
   7. Maximum Initial Grid Quads: 0
   8. Refine Mesh: On
   9. Jagged Seams: Off
   10. Simple Planes: Off
   11. Pack Textures: Off
5. You can click “Preview” to see how your model will be translated to planar polygons. Unless something looks really off, you can proceed by clicking “OK”
6. In the next dialogue box, set the file type to binary and check the box for “Export Open Objects”, then click “OK”

Here are some screen shots showing the settings described above:

This file is now ready for 3D Printing. The monitors in the 3D printing lab in Bank building can you help you with the next steps.

I know there was some difficulty getting the renderings of the glasses to look right. I did some research and it looks like the newer versions of Keyshot require a slightly different strategy to get the glass to look right. In my video I show making separate “bodies” for the glass and the liquid. This is done to avoid interference between the glass and the liquid where the surfaces are occupying the same space. The extra step is to separate (using explode or extractsrf)  the top of the liquid – that would make contact with the air – from the liquid that would make contact with the glass. There are additional settings that need to be configured for each part. See a full explanation here:

https://blog.keyshot.com/2016/render-liquid-glass-keyshot

Here’s a quick test rendering I did:

Another feature that is relatively new to Keyshot is a setting called “transparency distance”. This setting is found on both the liquid and glass(solid) material and if you are trying to render a colored liquid it will be important to understand. Essentially, transparency distance can be understood as a color that correlates to the thickness of a part. If the part thickness is equal to the transparency distance, the material will be the color assigned to the transparency distance attribute. As the thickness decreases, the color becomes lighter and less saturated, and as the thickness increases, the color becomes a darker and more saturated. You can see a nice overview of this here:

https://blog.keyshot.com/2016/how-to-adjust-color-density-on-transparent-materials-in-keyshot

Some more detailed and technical discussion around this topic can be read in this forum post:

https://www.keyshot.com/forum/index.php?topic=19466.0

I forgot to put the chairs in the studio until tonight. Sorry about this!

There are now four chairs (not including Dan’s) that are in the Prov Wash studio for your reference. The homework asks for 3 chair models, you can pick which 3 to model, but one of them must be the chair with arms. The other 3 are similar enough that you should be able to manipulate the curves from one to take on the form of the others. Just make sure you keep the curves for each chair and organize them with layers. Please don’t damage these chairs any more than they already are.

We didn’t look at this in class, but the “History” functionality in Rhino could be very useful as you are work on building the three bentwood chairs. This functionality will link input and output geometry. In other words, it can connect a curve (input geometry) with a pipe (output geometry) so that if the input curve is manipulated, the resulting output surface will follow this change.

More information here:
http://docs.mcneel.com/rhino/5/help/en-us/commands/history.htm

Part of the homework is to comment on someone else’s project. There are several ways to do this, but all start with opening the google doc you want to comment on (duh):

1. select the text you wish to comment on
2. go to Insert>Comment (you can also use the shortcut command+alt+M on Mac, or ctrl+alt+M on Windows)
3. type your comment into the field that appears
4. click on the comment button

or

1. float the cursor along the right edge of the page near the section you want to comment on until an icon of a talk bubble with a document in it
2. click on this button
3. type your comment into the field that appears
4. click on the comment button

As reminder, you are supposed to comment on the person whose last name is after your’s alphabetically (this exercise is for your benefit, so no need to comment on my post – it’s not included in this list). The last person in the order should comment on the first person. Here is a list of the class’s last names:

• Attias
• Barthel
• Bell
• Blum
• Chen
• Do
• Emy
• Gerasimoff
• Gillman
• Gutbrod
• Herrera Matiz
• Hetfield
• Humphrey
• Hutchinson
• Kusaba
• Li
• Mitrovic
• Robertson
• Rower
• Sherpa
• Silver
• Valenti
• Venegas
• Warren

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