Makerbot Views

I attended a 3D Printing workshop at the Makerbot HQ at the Metrotech center in downtown Brooklyn. Here are some views from the 21st floor.

The last view is of cereal boxes in the staff room. Cocoa Pebbles!

3D Printed Cards for DD

We visited a shop that made concept and object indicators out of cardboard (plus whatever the actual object was). These clever cards can be used as prompts, as labels for storage bins, for the visually impaired, for the developmentally disabled, etc.

It would be cool to 3D print them, although they would have to be hand-painted afterwards.

Micro Computer

A teacher showed me a miniature computer that was made using a Kano board. It make blinking lights!

Also, they 3D printed out a housing assembly.

img_4496 img_4502 img_4505

721K and 3D

The 3D printing program at 721K creates objects and adaptiations to help the students drink cavity-causing soda, and then squeeze the tooth paste roll to brush their teeth after!

3D Gears Math

SO here is the information for making 3D gears that all fit together. I used Sketchup for the design. All the gear convexities and concavities are 3-inch half-circles.

Screen Shot 2015-08-06 at 8.40.28 AM6-Spoke Gear

12-sided circle

6-inch radius (12-inch diameter)

Rotated 7.5 degrees


12-Spoke GearScreen Shot 2015-08-06 at 8.42.34 AM

24-sided circle

12-inch radius (24-inch diameter)

Rotated 15 degrees



24-Spoke Gear

48-sided circle

24-inch radius (48-inch diameter)

Rotated 3.75 degrees


Screen Shot 2015-08-06 at 8.54.54 AM Rectangular 14-Spoke Gear

12- by 24-inch rectangle

6-inch radius circles at ends

3D Gears

After having discussions with my math peeps, I decided to make gears. From scratch, in Sketchup. Many failures ensued. Thankfully, a Youtube video showed me the light (granted, I had to watch the video about 20 times).

Anyway, the gear ratio works (don’t ask me what that means), and different sizes of gears spin with each other. I even got fancy with irregular shapes (see the long gear) as well as gears with cut-outs (to save filament) and a gear with holes (to create abstract designs a la Spirograph).

Spinning Tree

This is a 3D printed tree that has movable branches. IMG_3269


I made it in Sketchup of simple geometric shapes, each rectangle just a wee bit smaller than the lower one.


The top part of the tree was actually a bit of challenge to create, as I had to create the triangle shape, but then make a partial hole through one side of it. There are three versions of it in the illustration above.

I exported each piece separately into Makerbot and then printed them one at a time.

Here are some more views of the tree.






Here’s looking at you, camera

The problem with the Mac’s camera is that it only faces the person in front of the computer. This is unlike iPad/iPhone, which has lenses facing both ways. So I thought why not 3D print a widget with two mirrors attached, that sits atop the computer? The part would work like a periscope. This way, teachers could record students without students being distracted by seeing themselves on the computer monitor.

Here is a sketchup version of the design sketch

Neighborhood with 3D Prints

Yuka Dawson of 256Q sent in these photos of a neighborhood her class made, complete with 3D-printed buildings and landmarks.

IMG_4237 IMG_4238 IMG_4240

What I notice:

  • different colored filament
  • models are to scale (maybe)
  • famous landmarks (statue of liberty, leaning tower of Pisa?, Grand Army Plaza?)


Hinges from start to finish

I designed hinges in Sketchup

sketchup hinges

and exported them to Makerbot

Makerbot hinges

Here they are being printed (around 40% done)

Hinges infill

Here it is about 60%


meh. The machine just overheated.

hinge final

It is just as well, since the design was not correct. The hinges are just a bit too big to fit together.

Back to Sketchup….

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January 2022