Replace one of you MK7 spacers with this part and you can pen plot with a fine point Sharpie.

This is a holder for test leads and other cables. We use it in the MakerBot R&D lab to keep things nice and organized.

This part uses geometry identical to the original. I provide a SolidWorks model and a drawing you can use to model this part in your favorite software. I will add new parts to this thing as they are designed.

I've created a base module that will bolt onto the shaft cover of your Thing-O-Matic. This can be used for mounting an adjustable light on your MakerBot.

If you would like to request anything in this series, please leave a comment below. I'll try to get it done for you.

This part clips onto you MakerBot filament spool [1] to keep the filament in place during transport or printing. It is designed to work with the MakerBot filament spool holder [2]. The housing freely rotates around the spool as filament is removed.

[1] store.makerbot.com/plastic.html
[2] thingiverse.com/thing:7105

This is just a square donut for calibration.

MakerBot Industries now sells filament on spools! Here is a spool holder you can mount on you Thing-O-Matic or Cupcake CNC in place of any rod cover.

You should also print the spool housing to keep you filament nice and tidy. thingiverse.com/thing:8762

If you want to stack two spools, checkout tbusers Spool Stacker thingiverse.com/thing:9198

This is a 3D Tin road map.

This is a UV light exposure unit for photo-resist etching PCBs.

UV Box Kit
----------
1 laser cut kit
1 top, laser cut 1/4 inch clear arcylic
1 bottom, laser cut 1/4 inch clear acrylic
1 curcuit board kit
1 PCB
1 mini USB, SMD
48 UVA LED 0603 (~410 nm)
48 200 Ohm resistor 0603
4 spacer 1/4 inch
4 thumb screw

PCB Construction Kit
--------------------
1 UV Box Kit
2 developer, 5 g bag
2 etchant, 5 g bag
1 tinning solution
3 Lock & Lock containers
6 Fotobard, 3x4 inch, single-sided
6 Fotoboard, 3x4 inch, double-sided
1 rubber gloves, pair
1 example mask book, 3x4 inch masks
1 Arduino mask
1 goggles
1 sponge
1 photographic paper pad

UVA LEDs
-------
-http://www.alibaba.com/product-gs/216309397/0603_UV_SMD_LED.html
-$0.0735 each
-http://cgi.ebay.com/100PCS-0603-Ultra-Bright-SMD-Purple-LEDs_W0QQitemZ380175467368QQcmdZViewItem QQptZLH_DefaultDomain_0?hash=item5884394368
-$0.19 each
-http://cgi.ebay.co.uk/100-BRIGHT-UV%2FPURPLE-0603-SMD-LEDs-SMT-LED-100mcd-603_W0QQitemZ260316739549QQcmdZViewItem QQimsxq20091013?IMSfp=TL091013156004r32688
-$0.234 each
-http://www.phenoptix.co.uk/UV_PURPLE_SMD_0603_LED_p/smd-uv-0603-100.htm
-$0.20 each
-http://www.niktronixonline.com/0603_SMD_LED_UV_Purple_Ultra_Bright_100_mcd_p/0603smduv.htm
-$0.40 each
-http://ledmuseum.home.att.net/leduv.htm
-http://www.ec21.com/offer_detail/Provide_SMD_UV_LED--2142957.html
-http://www.giant-supplier.com/0603smdLED.htm
-http://yesled.com/eh/product_info.php/cPath/21_29_201/products_id/634

200 Ohm Resistors
-----------------
-http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=311-200GRTR-ND
-$0.001863 each
-http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=P200GTR-ND
-$0.00243 each

Spacers
-------
-http://www.wclco.com/Plastic_Components/Spacers_Washers.php
-WCL Fastening Facts
-1.800.331.3816
-Catalog page: wclco.com/pdf/plastics/075-077.pdf

Lock & Lock Containers
----------------------
-http://www.amazon.com/Lock-Piece-Rectangular-Value-Pack/dp/B001AS5VYQ/ref=pd_sim_k_4
-"Lock & Lock 1.4 Cup 8 Piece Rectangular Value Pack"
-$4.33 each
-http://www.amazon.com/Lock-Shrinkwrap-Square-Value-Storage/dp/B001ASAIRQ/ref=sr_1_12?ie=UTF8&s=home-garden&qid=1258338207&sr=1-12
-$5 each
-http://www.amazon.com/2-5-CUP-SQUARE-LOCK/dp/B00167REFU/ref=sr_1_115?ie=UTF8&s=home-garden&qid=1258338553&sr=1-115
-"2.5 CUP SQUARE LOCK N LOCK"
-$3.79 each
-http://www.organize.com/squarecuplock.html
-3.99 each

Plating
-------
-http://www.cool-amp.com/prices_order.html
-Silver plating powder
-$30.00 for 3 oz.
rapidonline.com/Tools-Fasteners-Production-Equipment/PCB-Equipment/Etching/Tin-plating-crystals/29475
-11.58 for 90 g

Notes
-----
-http://www.pcbfx.com/ makes a Fab-in-aBox kit. They also sell toner sensitive foil.

This is a mushroom I made in SolidWorks to test support material.

The MakerBot Unicorn pen plotter is fun and makes great drawings. We made a bunch around the office and wanted a nice way to display them.

I use this for mounting Gen3 electronics for testing. There are mount points for a motherboard, extruder controller, and three stepper drivers.

The relay driver adapter allows the relay board to be mounted to the stepper driver controller. The relay controller adapter allows the relay board to be mounted on the extruder controller board.

This is a 3D scan of my face using the MakerBot Cyclops 3D scanner.

This is a gum stick.

This is a parametric filament made with open scad. Use it to print as much filament as you need.

This object is designed to hold a key, preventing unauthorized duplication through visual inspection. When a serial-numbered security tag is inserted through both the key's hole and the holder's hole, the key can only be used if the tag is cut. Therefore, it will be known if the key may have been used.

This is a standoff created to hold up a friend's monitor.

This is a paxtruder version that I've had sitting around for a while. There are more recent versions, but I thought I'd post it anyway. The acetal should be 4mm thick.

Subversion svn.makerbot.com/users/charles/paxtruder/

Here's a handy little cardboard spool you can use for your MakerBot filament. I designed it for a thicker cardboard than pictured, but all I had around when I was inspired were some pizza boxes.

As posted on my blog charlespax.wordpress.com/2010/01/08/cardboard-spool/

See it in action as part of the future Bowden filament drive box charlespax.com/2010/01/26/makerbot-filament-box-and-drive-mechanism/

The latest version can be found in subversion at svn.makerbot.com/users/charles/bowden/ .

EDIT 2010-03-21: I added a divider to the files. Thanks, Kevin. I also decreased the size of the hole that secures the filament to better grab the it.

Okay, this is not quite done, but I thought I'd throw it out there anyway.

This version is less prone to cracking. Instead of a washer and nut, there is an M6 tapped hole in a piece of aluminum. But best of all, two can be bolted together to form a dual head extruder. Yes, you can have one or two of the same extruder! I'm working on a mount for this right now.

See my YouTube videos of previous versions for theory of operation (http://www.youtube.com/watch?v=HMjVrmLJvIU) and how quickly the filament can be changed (http://www.youtube.com/watch?v=z_isuzpvjBc)

Subversion svn.makerbot.com/users/charles/paxtruder/

This is a box I made for exposing photoresist-coated PCBs to ultraviolet light. It's what Kelly used to make the PCB connector for the thermal printer [1]. I used scavenged parts, so I can't give a list of everything I used in making it. You can find more information for this box and photo etching on our wiki [2].

[1] nycresistor.com/2009/10/13/thermal-printer-success/
[2] wiki.nycresistor.com/wiki/Photoresist_PCB_Etching

This thing is small! You can make this using a few laser cut parts and your MK4 extruder hardware. There are a few tweaks I need to make, but it's closer to the final design. For more information see my blog post charlespax.wordpress.com/2009/10/30/paxtruder-0-2 .

Derivatives
Paxtruder-0.4 thingiverse.com/thing:1332
Drop in paxtruder thingiverse.com/thing:1351
Paxtruder Mount thingiverse.com/thing:1341

Subversion svn.makerbot.com/users/charles/paxtruder/

This extruder is a derivative of Zach's plastruder and I'm really excited to share it. The main difference is that exchanged the idler wheel with a Delrin plunger. This reduces the overall size of the extruder uses two fewer layers.

Using a plunger allows the force exerted on the filament perpendicular to its direction of travel to be adjusted while the extuder is running. I mounted the electronics along the side, so I can view the teeth on the filament on the way to the thermal barrier and adjust the force to get the tooth depth I like.

With this design, changing the filament takes approximately ten seconds from when the barrel becomes hot enough. The motor can be removed with out disassembling the housing.

There is, however, a flaw in this particular design. The captive nut holding the plunger screw will crack the acrylic if you tighten things too much. In the next version I will have this fixed. This design is also based on a larger diameter timing pulley, so the filament guide is a little off.

See it in action youtube.com/watch?v=HMjVrmLJvIU

Subversion svn.makerbot.com/users/charles/paxtruder/

This is a small wooden box I made while learning the box-making process. The design allows the box top to be placed on the bottom in any orientation without disrupting the checkered pattern. Also, all four sides are identical, as are the top and bottom. I did this so I wouldn't have to keep track of which part belongs where.

This build isn't finished yet. I still need the XY axis components, stepper motors, and a hardware burrito. I cannibalized the screws from my extruder to hold the thing together!

Modifications
. Electronics are mounted upside down in the bottom cavity with the power supply
. All four sides are open
. The bottom plate comes straight off after removing the screws
. Acrylic letters are where "MakerBot Industries" would normally be.

After a conversation with Adam I have been inspired to put the z axis drive system within the lower cavity.

I get the electrons inside I had to laser cut holes into the middle layer in which I put standoffs that normally hold motherboards away from computer cases. The entire bottom was redesigned, so the bottom cover can be removed without taking off the side.

While the SD card can be accessed, it does not currently do anything.

Subversion svn.makerbot.com/users/charles/muffin/

Blog: charlespax.wordpress.com/
Twitter: twitter.com/charlespax

The tangram is a dissection puzzle consisting of seven flat shapes, called tans, which are put together to form shapes. The objective of the puzzle is to form a specific shape (given only in outline or silhouette) using all seven pieces, which may not overlap.[1]

My nieces have a tangram book, but had lost the pieces, so I made a few copies on the NYC Resisor laser cutter.

[1] en.wikipedia.org/wiki/Tangram

At the NYC Resistor laser cutting class I embedded one of Zach's planetary gears in one of Zach's planetary gears. This design was laser cut from black acrylic and sandwiched between two clear acrylic sheets.

I found that the inner circle in the front layer needed a smaller diameter to rotate smoothly. I also cut a gasket that sits between the front and gear layers. Otherwise the gears always contact both the front and back layers.

After class I took my project to dinner with a few friends where it was an interesting conversation piece.

Someone should turn these gears into something that can be 3-D printed.