Archive for the ‘Class/Workshop’Category

Frank Hammer Genetics & Epigenetics talk tonight!

Frank Hammer, a retired scientist from Monsanto, will be giving a talk tonight on Genetics and Epigenetics. The session is divided into two parts:

1st Discussion

1. General genetics, which would include the structure of DNA,
2. How the four bases or nucleotides, adenine, thymine, guanine and cytosine are paired,
3. What is a gene,
4. What is messenger RNA (mRNA)
5. How mRNA codes for proteins,
6. What is a codon,
7. How proteins are manufactured in the ribosome,
8. Answering questions.

2nd Discussion

1. The polymerase chain reaction (PCR), which is how we multiply DNA millions of times so it can be forensically and biologically analyzed,
2. Epigenetics, its causes and effects,
3. Answering questions.

Frank’s Bio

Frank has been involved in the life sciences for about sixty years. Has written two book chapters, many reports, including one about antisense which was published by Frost & Sullivan. Frank has eight patents, in the fields of food technology and diagnostic biochemistry. His avocations are reading and writing poetry.

And that’s all Frank wants to say about himself… Find out more at the meeting :)

See you all soon!

When/Where

Tue, August 27, 9:00pm – 10:00pm
PS:One, 2nd Floor
3519 N. Elston Chicago, IL 60618

27

08 2013

PS:One Orientation: Sunday August 25 at 4pm

Us in 3DPS:One orientation (previously known as N00bs’ Paradise) is happening Sunday at 4pm in the downstairs lounge.

Never been, but want to learn more about PS:One?
New member?
Old member, but want to know all the secrets of the inner workings of PS:One?
Want to get certified, but don’t know how?
Want to doocritize, but haven’t even heard of do-ocracy?
Then this event is FOR YOU!
Free, open to all event – just show up at 4pm on Sunday the 25th

You’ll learn:

  • the one and only rule you need to remember at PS:One!
  • what mailing lists and IRC channels you should join
  • how to get discounts on classes, tee-shirts, stuff around town, and even monthly dues!
  • how to get certified on equipment
  • how to donate equipment to PS:One
  • how to create a class, event, group, meeting, or what have you
  • how to request a class, event, group, whatever
  • how to blog
  • the wiki.
  • do-ocracy and how to do-ocratize things

The basics:

  • Who: anyone who wants to learn more about PS:One and how it works
  • When: Sunday, August 25 at 4pm
  • Where: PS:One 1st floor lounge
  • Cost: free

Here are the class notes – please feel free to read beforehand (Note: these notes are not a good substitute for class attendance).

23

08 2013

CNC Gonzo Build #2 – Recap

ps1_draw

The project was to build a “single axis” drawing machine in one night.  This machine uses two independently controlled carriages on a single piece of MakerSlide rail to control a pen at the tip of two linkages.  The primary purpose of the project was a fun group build and a learning exercise in setting up a non-Cartesian machine using inverse kinematics.  Kinematics in this case means mathematically describing the machine to the CAM controller.  The One Axis DrawBot is a very simple non Cartesian machine.

kinematics

The equations used are shown above.  The ends of the linkages on the carriages end are at joint[0] and joint[1].  The pen is at pos->tran.x and pos->tran.y.  The first two equations convert the desired pen location back to actual machine locations.  They were plugged into the CAM program.  The last two equations do the opposite and convert machine locations to the pen location.

img_0003

img_0004

One Axis Drawing Machine

We had one team assemble the machine, one team wire the electronics and one team setup the controller.  It took about two hours to complete that phase.  We try to use newbies wherever possible, so adding solder training into the mix usually adds a little time.  The next step was to setup the CAM controller.

mach3

 

formulas

We borrowed the  CNC router computer and control box to run the machine.  This has Mach3 CAM controller software on it.  Mach3 has a “formulas” feature that we used to enter the kinematics.  We quickly had the machine running, but it was soon clear that Mach3 was not completely up to the task.  In the formulas mode, it appears to disable the DROs (digital read outs) which tell you exactly where the machine is.  It was also difficult to home or tell the machine the current location.   Moves in the Y axis are non linear and need to know the current location.  This resulted in Y axis moves that were not 100% accurate.

xy

 

The other problem was coordination.  If you tell a CNC machine to move from X0, Y0 to X1, Y0,  it accelerates up to the desired speed then decelerates to the end point.  If you tell it to move from X0,Y0 to X1 Y10, the two axes are moving different distances, so it needs to coordinate the different axes speeds and accelerations. The X axis would move quite a bit slower to coordinate with the longer Y distance to get a straight line.  Mach3 was coordinating the two machine axes, but it was not coordinating the pen axes.  Moves in only X or only in Y were nice and straight, but moves in both X and Y had a bit of a curve to them, but they did accurately arrive at the end point.  A graphic with a lot of short moves would not show any on the problems above so we ran a quick “PS:One″ graphic.  Watch the video and be sure to wait for the applause.

YouTube Preview Image

We will switch to using EMC2 (LinuxCNC).  This has a true inverse kinematics feature that should fix the problems.

There is some discussion on the EMC user mail list to help us with this project.

Update 6/23/2013:  Here is the latest (untested) version of our LinuxCNC kinematics file mykins.c

 

16

06 2013

ABS Smoothing – CNC Build Club

ABS Smoothing

Last night’s meeting was great.

  • A huge turn out of about 25-30 people
  • About 8 people certified on the laser by Colin
  • About 4 people certified on the vinyl cutter by me.  I started adding tips to the wiki page for the vinyl cutter because there was a little struggling to get good results.  I think it was due to not setting the orientation of the plot (worked for me)
  • I saw some certification on the LulzBot.  We need the linux computer for that fixed or replaced!
  • Ryan and Liz Certified on the CNC router and they cut a complete project on their own (cool little circle/star thing)
  • Acetone Smoothing….So it appears to make good prints look great and bad prints to worse.  You can’t polish a turd.
  • The Quantum Delta was slowly cranking out angry ducks and squirrels all night.

ABS Smoothing

ABS Smoothing

We did some experimenting with ABS Smoothing.  Donald J brought in most of the equipment which consisted of a heating pad, glass cookie jar and a little stand to put the parts on.   We put a small amount of acetone in the jar, then put 3D printed ABS parts on the stand.  When the acetone heats up it forms a cloud in the bottom of the jar, enveloping the ABS part.  Most of the acetone condenses back near the top of the jar.

It worked pretty well on finely layered parts.  It made some parts actually look little worse by highlighting flaws.   It took quite a while to heat up and could be optimized.  Donald is looking for volunteer ABS parts to practice with.

We have a temperature controller for it we can wire up.  It can only drive about 3amp @ 110V.  Does anyone have an SSR?  The mechanical relay probably won’t last long in this application.  The heater is probably 5-7 amps (guess)

IMG_20130530_210606

 

Sponsor Shout Out: Special thanks to Automation Technologies Inc for the loan of a CNC router

31

05 2013

Conductive Paint Workshop: Wednesday @ 7pm

Good news! Instructables have started sponsoring monthly build nights. And the more tutorials we make, the more supplies and equipment they’ll send us.

This month, we received a whole bunch of Bare Conductive Paint Pens. Tomorrow night at 7pm, we’ll spend a few hours playing around with them. Come experiment with the wonders and dangers of paper circuitry!

29

05 2013

Math Office Hours, this Sunday from 5 to 7

Express your inner mathnerd! Come join us for an evening of learning: algebra, calculus, word problems, finding x, and much, much more. We’re open to anyone looking to brush up on basic skills and to those who want to learn about more advanced topics. We can even stray into set theory, topology, and fourier analysis…. it’s all up to you!

If you’re feeling intimidated, don’t be. Any level of math experience is welcome. We will be happy to discuss any topic that falls under “math”. No question is too basic. Got a homework question? We can help! Trying to solve a tricky equation for a problem? We’ll think it through with you. Want to learn the basics of what math is all about? We’ve got you covered!

Math should be a common language to all, and we will be more than happy to help you take the first steps towards a lifelong appreciation of this beautiful subject!

Whos, Whens, and Wheres

  • Who – Anyone who wants to learn about math
  • Where – PS:One, second floor, in the electronics area
  • When – Sunday, May 26th, 5pm until 7pm
  • How much – Free

22

05 2013

PS:One Orientation Sunday 5/26 4-6pm

Longboard designed & fabricated by Bart Dring of buildlog.net

Longboard designed & fabricated by Bart Dring of buildlog.net

PS:One orientation (AKA: N00bs’ Paradise) Sunday at 4pm in the downstairs lounge.
Never been, but want to learn more about PS:One?
New member?
Old member, but want to know all the secrets of the inner workings of PS:One?
Want to get certified, but don’t know how?
Want to doocritize, but haven’t even heard of do-ocracy?
Then this event is FOR YOU!
Free, open to all event – just show up at 4pm on Sunday the 26th and we’ll take care of you.

You’ll learn:

  • the one and only rule you need to remember at PS:One!
  • what mailing lists and IRC channels you should join
  • how to get discounts on classes, tee-shirts, stuff around town, and even monthly dues!
  • how to get certified on equipment
  • how to donate equipment to PS:One
  • how to create a class, event, group, meeting, or what have you
  • how to request a class, event, group, whatever
  • how to blog
  • the wiki.
  • do-ocracy and how to do-ocratize things

The basics:

  • Who: anyone who wants to learn more about PS:One and how it works
  • When: Sunday March 24th, 4 pm until about 6pm
  • Where: PS:One 1st floor lounge
  • Cost: free

Here are the class notes – please feel free to read beforehand (Note: these notes are nota good substitute for class attendance).

Tags: ,

21

05 2013

CNC Build Club – ShapeOko Night

shapeoko

This Thursday at 7:00pm  Edward Ford will be hosting a ShapeOko night.  Edward can help you build, complete, setup and use the ShapeOko router.

He will also give a quick overview of the web based MakerCAM program.  MakerCAM can be used to create toolpaths for CNC routers.  Edward and Inventables are working to develop this program into a full featured CAM program.

MakerCAM

For those without ShapeOkos, we can talk about your CNC project or work with some of the digital fabrication equipment at PS:One like the laser cutter, CNC router or 3D printers.

Please RSVP via Meetup.com.

 

 

 

19

05 2013

NERP tonight: Beagles and Barbells

NERP is not exclusively raspberry pi, the small computer interest group at
Pumping Station:One in Chicago.

Two Pumping Station:One members, Jarrod Wolf and Gabe Priyev, are co-founders of SpotMe (spotmefit.com), a startup which aims to “Bring Gyms and Health Clubs into the Digital Age”. Spotme’s patented technology

“… makes fitness easy. SpotMe provides workout plans that are tailored to an individual’s goals and that adapt to a user’s biometrics. Our system is seamless; it does not require user input to function. SpotMe service is offered through a subscription that is bundled with gym memberships. When a member shows up at the gym, they are provided with a personalized workout (accessible via app or print out). All a user has to do is put on a wristband and ankleband. It’s that easy.”

Tonight Gabe will describe how the sensing parts work, and the role of small wireless hardware devices that move data between different parts of the system.

Dem Bones

The Beagle Bone embedded computer is in the spotlight again tonight. Drew Fustini will share some of the BB-related insights he gathered a couple of weeks ago at Design West. This will be the first in a series of talks Drew will give on “official” guidance for new users as offered by the Beagle Bone developers and project evangelists. Good stuff.

Find NERP and Pumping Station:One
at http://www.meetup.com/NERP-Not-Exclusively-Raspberry-Pi/
and http://pumpingstationone.org

NERP meets at 7pm 5-6-13 at Pumping Station:One, 3519 N. Elston Ave. in
Chicago. Doors open at 6:30pm. NERP is free and open to the public.

Ed Bennett ed @ kinetics and electronics . com

06

05 2013

Bitbeam Presentation – CNC Build Club

Bitbeam

This week we have a presentation by Jason Huggins (@hugs) on Bitbeam and the Tapster robot he built with it.

jason-huggins-with-tapster

When:

Thursday, May 9th @ 7:00pm, upstairs in the electronics area

Topic:

Jason will give an overview of Tapster, his open source, 3D printable, mobile app testing robot. In addition to explaining why creating a mobile testing robot is not the worst idea you’ve ever heard of, Jason will give an overview of Bitbeam, the open source building toy that he developed, which Tapster’s made out of. He’ll cover his making journey as he’s experimented with laser cutters, CNC mills, and 3D printers to make Bitbeam. For fun, the talk will also include live demos of Tapster playing Angry Birds.

About Jason:

Jason Huggins is CTO and co-founder of Sauce Labs, a software test infrastructure company, and is the original creator of Selenium, a popular open source web testing tool. In 2011, for an art project he was working on, Jason created Bitbeam – a 3D printable LEGO-Technic-compatible construction toy. Jason lives in Oak Park, Illinois.

51_14.jpg.560x350_q85_crop-smart

CNC Stuff

Following the presentation we will break away to work on various CNC projects. The ongoing group project continues to be the mid-sized CNC Router. The machine is now fully functional under Mach3 control. We can talk about the Mach3 setup and cut a few things.

YouTube Preview Image

06

05 2013