Rubric:

2pts .stl file.

.stl file of spinner top is submitted to google classroom

2pts blueprint.

blueprint is submitted of spinner top to student website

2pts slicing preview

slicing preview of spinner top is on students website

preview shows a 5 HOUR OR LESS PRINT TIME

preview shows 150 GRAMS OR LESS OF MATERIAL

2pts photos

Two photos of finished work with spinner handle

Photos are taken on a CLEAN BACKGROUND

2pts mastery

Assignment is repeated with a new or improved design.

Second spinner top meets all requirements of the first.

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10pts Total

Your calipers are rulers ARE IN INCHES

Make your DESIGN USING INCHES

Create your sketch starting in the FRONT VIEW. We will be rotating this design so it needs to be started in the front viewing plane.

• Using a CENTER POINT RECTANGLE

• Create a square

• Use the DIMENSION TOOL

• Set the height and length to 4.5in

This will be our maxing sketching area for our spinner top (the maxing print area of an Afinia H400 3D printer)

• Use the LINE TOOL

• Draw a line evenly down the middle

This line will be used later to revolve our sketch around to create a 3D object.

Draw your spinner on HALF of the drawing space. We will revolve the drawing to create a 3D object in the later step.

Draw HALF of the hole for the spinner rod.

1. Remember that you will need to dimension HALF of the diameter of the hole

2. Make the bottom of the hole a point (this will prevent the need for support structures)

Exit the sketch. Use the revolve button.

This tool will FIRST ask you to select the surfaces you want to revolve.

The revolve tool has a SECOND STEP.

You will need to click the box in the pop-up called "revolve axis" then you will select the line we made down the middle of the drawing (our mirror line).

Make a blueprint!

1. Set the corner view to SHADED

2. Set the front and right views to SHOW HIDDEN LINES

3. Dimension the hole for the rod

4. Dimension the MAX HEIGHT and MAX WIDTH

Remember to export with MILLIMETERS!

You can print your spinner top with EITHER the Afina H400 or Dremel 3d45 printers.

Take a screenshot of your print preview.

Your print MUST take 5 hours OR LESS to print.

Your print MUST use 150 grams of material OR LESS to print*

This includes any support structures needed for your model.

You may or may not need to sand your dowel to make it fit into your spinner top.

Remember this is a PRESS FIT. Use a tool if needed to press in your dowel to secure it.

Use your spinner handle and a marker to locate where you will place the hole.

Use the drill and ANY JIG to make a hole in your dowel.