Saturday, January 12, 2019

3D Printed Chess Board + Pieces

January 13, 2019 | ATL 

Chess is a game of strategy, patience, mind, and intellectual mettle. Chess pieces and chess boards are also a whole category of art and craft onto themselves.


We've created this chess set to show once again what 3D printing is capable of.

The chess pieces themselves were modelled in Sculptris, a free 3D sculpting software made by the creators of ZBrush. The pieces are modelled after Thai Makruk pieces. The pieces correspond to Western chess so you can actually play both Thai and Western chess on the same board with the same pieces.


The board itself is fairly large, with each square being 50x50mm and the overall width at 510mm.

Friday, January 11, 2019

3D Printed Electric Screwdriver: Modifications

January 12, 2019 | ATL

Our 3D printed electric screwdriver worked well enough, but had some serious wobble because of instability between the servo itself, the couplers, and the bit holder holding the screwdriver itself.



Pressure being transferred to the servo was also a concern. We had glued the servo-bit coupler to the 608zz bearing. But hot glue gives under pressure and eventually the servo would be taking any pressure placed on the bit.

A redesign of everything included using two 608zz bearings, a new coupler that integrates the bit holder instead of connecting to it. The bit holder also physically rests on the bearings, and the bearings rest on the bearing housing, meaning no pressure will ever be placed on the servo itself, with or without glue.

Because the new bit holder is shorter, despite putting an extra bearing and spacer into the design, it is not that much longer. The spacer could even be a little smaller, making the housing and overall length shorter as well. Let's see how this design works and maybe if future changes are made, the design can be shortened as well.

All the files and details on assembling this project are available on Thingiverse here.

Follow ProgressTH.org on Facebook hereInstagram here, or on Twitter here. We also put all of our 3D printed models online for free at Thingiverse.com here.

Tuesday, December 11, 2018

3D Printed 9g Servo Screwdriver

December 12, 2018  | ATL 

We needed something to drive small M4 or smaller bolts because we have hundreds of them that need to be driven. Bolts don't require a lot of torque and anything that drives them at the same speed as can be done with hand or a little faster would be a great help in terms of ergonomics.



A 9g servo converted for continuous rotation (see tutorial here) won't drive screws into wood, but is fine for small bolts we use for client projects.

To make the servo move a bit faster and to give it a tad more torque, we bumped up the voltage to 6 volts (check your servo's data sheet to see what its max voltage is) using this buck step-down power supply we picked up from Gravitech's Home of Maker.

Everything goes into the handle.

Tuesday, November 27, 2018

Converting a 9g Servo for Continuous Rotation

November 28, 2018 | ATL

Micro-servos are great devices perfect for adding motion to your projects. Unlike steppers, they can be controlled directly from your Arduino or other favorite microcontroller. Most servos are limited to 180 degrees of motion.



This allows microcontrollers to know the exact position of the servo's shaft. You can find continuous rotation servos, but if you have access to lots of cheap micro-servos of the 180 degree variety, it might be helpful to learn this quick hack to make them continuous.


Saturday, September 22, 2018

Testing 3D Printed Orbital Shaker V 2.0

September 23, 2018 | ATL 

The first application we've put the 3D printed orbital shaker to work on was agitating containers with samples in it for this red cabbage pH protocol. The protocol is simple, takes just minutes to do, and depending on the sample you are testing, can work instantly or require a bit of agitation which you could easily do by hand, but we have an orbital shaker so why not use it? 

One sample (pictured below, left) was actually homemade soap. The middle is coffee, and the right is regular tap water. We also later tested lime juice which instantly turned the cabbage juice red-pink.  


There are scales online showing the different colors red cabbage juice will change depending on what pH it is exposed to. The image below was taken from here.



We've been making DIYbio lab equipment mainly just to make it and put it out there for others to use, modify, and improve on. The designs for our equipment are freely available on Thingiverse here. We haven't been using it for too many applications of our own yet, but we have used the centrifuge to extract DNA from rice, and now this pH protocol shows some promise. 

What would you use your shaker for? 

Follow ProgressTH.org on Facebook here, Instagram here, or on Twitter here. We also put all of our 3D printed models online for free at Thingiverse.com here.

Saturday, July 14, 2018

Found! 3D Printed Rocker-style DIYbio Shaker on Thingiverse

July 14, 2018 | ATL

This 3D printed rocker-style laboratory shaker was designed by Akshay Dhamankar, an engineer/maker from Buffalo, New York, USA who shared the design on Thingiverse.



We like the use of ball bearings, stepper motor driven by a stepper driver and Arduino and the simple potentiometer setup. This is very similar to our orbital shaker and means building this particular design or one similar to it can be done with what we have on hand.



We ultimately want to make something similar (but smaller) to the GE Wave Bioreactor System which is also a rocker-style laboratory shaker with heating and other options built in. So Akshay's rocker-style system gives us a good reference point for informing our design meaning we won't have to start from scratch.

This is the beauty of the online opensource 3D printing community. Everyone makes designs that inspire others and it all moves things forward. Together, we're all benefiting from lessons we learn with each design and implementation.

Follow ProgressTH.org on Facebook hereInstagram here, or on Twitter here. We also put all of our 3D printed models online for free at Thingiverse.com here.

Monday, July 9, 2018

3D Printed Orbital Shaker: Exploded View

July 10, 2018 | ATL

Here is an exploded diagram of the DIYbio 3D printed orbital shaker.

The Thingiverse files include potentiometer holders for two kinds of potentiometers common at electronics stores (here and here). There are also feet you can add to the bottom. Hot glue doesn't seem robust enough, so friction welding or super glue might be better options.

This exploded view also includes the newer M5 bolt bar system.

The diagram is a stop gap until we do some videos or tutorials on assembly. 

Follow ProgressTH.org on Facebook hereInstagram here, or on Twitter here. We also put all of our 3D printed models online for free at Thingiverse.com here.