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

 

biggear

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.

spinningtree

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.

IMG_3271

 

 

 

IMG_3267

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%

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….

Makerbot

Back at the District Office, I have been experimenting with a Makerbot Replicator 2X Dual Extrusion 3D Printer (whew, that’s a mouthful).Makerbot 2X

There is so much potential for 3D printing, yet there is still just a 66% success rate on our prints. Some prints stop sticking to the build plate, sometimes the extruder clogs up in the middle of a print, sometimes who-knows-what happens.

I wish it were as easy as a Ron Popeil’s rotisserie chicken cooker. You know, “JUST SET IT AND FORGET IT!”)

New series: 3D Printing

I am going to start a new series on the blog, on 3D printing. stay tuned.

June 2017
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