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Robert Wozniak
Works at Boeing
Attended Univ of Maryland
Lives in Media, PA
2,021 followers|675,759 views
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Robert Wozniak

Development  - 
 
I just learned about this Panasonic I2C Infrared 8x8 array sensor.
It might have useful applications for monitoring printing temperatures, bed heat or controlling cooling.:
http://pewa.panasonic.com/components/built-in-sensors/infrared-array-sensors/
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Mark Fuller's profile photo
 
Temperature range for the Panasonic sensor is - 20 to 100°C, +/- 3°C accuracy, up to 10hz frame rate.  It might not work for monitoring.
USB eval board ~$75 from DigiKey, sensor alone is ~$40 ea.

Melexis MLX90620 is a
16x4 array, - 20°C to 300°C, +/- 1.5°C accuracy between 0-50C.  Frame rate up to 512 hz.
Eval board ~$370, sensor ~$84 ea. from DigiKey.

Getting either to work right requires attention to thermal design.  Emissivity of the object you're looking at changes the detected temperature, accuracy is reduced as frame-rates go up, etc.etc.etc...
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Robert Wozniak

➥ What do you make? ►  - 
 
Yesterday I received a 2.2" ILI9341 LCD Display. I also just discovered the magnificent UTFT library by Henning Karlsen.
It was very easy to get it working with the Teensy3.0. I probably had it working withing 45 minutes of unpacking the display.
I am using the latest version of software and libraries. Teensyduino 1.18, Arduino 1.0.5, and UTFT V2.75

The UTFT library was just updated a couple of weeks ago, and has Teensy3.x support built in.
The UTFT Library is located here: http://www.henningkarlsen.com/electronics/library.php?id=51

The wiring and the code running in the video can be found here:  http://forum.pjrc.com/threads/25579-UTFT-Library-with-ILI9341-2-2-Inch-240*320-SPI-TFT-LCD-Display?p=45676&viewfull=1#post45676
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Luke Seed's profile photoJiri Kastner's profile photoPeter Wobacz's profile photoVictor Borah's profile photo
3 comments
 
Lucky you, I had no problem on Duemilanove, but didn't get it working on Yún.
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I received my Teensy 3.1 today.
I've been compiling several sketches, but when I try to compile the FirstLight example sketch included with FastSPI_LED2, I receive several errors.

I changed the LED Arrangement configuration to:
FastSPI_LED2.addLeds<WS2811, DATA_PIN, GRB>(leds+18, NUM_LEDS/3);

The delay.h error I receive is:
...FastSPI_LED2/delay.h: In function 'void _delaycycles_AVR() [with int LOOP = 6; int PAD = 0]':
...FastSPI_LED2/delay.h:33:4: error: unknown register name 'r16' in 'asm'

I've attached a screen-cap of the error screen.
Has anyone else seen this, or figured a workaround?

Thanks
3
Kevin Price's profile phototrenton carr's profile photoRobert Wozniak's profile photoDaniel Garcia's profile photo
9 comments
 
Hope your new year turns awesome very soon. Thanks again!
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Robert Wozniak

Show-n-tell  - 
 
My daughter and I were playing around with her ink pad and some NinjaFlex flexible key fobs I printed... This has some fun potential!

The upper stamps are from the side printed on the glass, the lower stamps show the fill pattern of the top layer. One could easily mirror the part to get the textured stamp print correct.
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Robert Wozniak's profile photoEl. from LTF (Local Tiny Factory)'s profile photoClaudine S. T.'s profile photoTony Olivo's profile photo
6 comments
 
Pretty cool!
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Robert Wozniak

Feature Requests  - 
 
Mathias,
I think a nice feature would be the ability to select an option to view only one layer at a time.
1
Robert Wozniak's profile photoMathias Dietz's profile photo
6 comments
 
Thanks... Do you like the results?
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Robert Wozniak

Show-n-tell  - 
 
I printed this 2 color logo, by using the @pause command in Repetier Host.  I inserted an @pause in the gcode just before the Z move between layers. Repetier allows you to create custom code that is executed after a pause. in this case.
  G1 E-5   ;Retract filament 5mm
  G1 Z100  ; Raise the print head

I then changed out the filament flushed it through, and manually performed a 5mm retract before unpausing. The manual retract, was because the next command to be executed after the printhead returned to the location where the pause was initiated, was a return from a 5 mm retract, and I didn't want a blob at the start.

The logo is printed from NinjaFlex flexible urethane filament at 215C
The NinjaFlex colors are very vibrant and it's pretty easy to print with once you get the hang of it.
The printer is a Mendel90 with a Melzi controller and E3D hotend.
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Robert Wozniak's profile photoWayne Friedt's profile photo
3 comments
 
ah good idea
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Have them in circles
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Robert Wozniak

Work in Progress  - 
 
 
Yesterday I received a 2.2" ILI9341 LCD Display. I also just discovered the magnificent UTFT library by Henning Karlsen.
It was very easy to get it working with the Teensy3.0. I probably had it working withing 45 minutes of unpacking the display.
I am using the latest version of software and libraries. Teensyduino 1.18, Arduino 1.0.5, and UTFT V2.75

The UTFT library was just updated a couple of weeks ago, and has Teensy3.x support built in.
The UTFT Library is located here: http://www.henningkarlsen.com/electronics/library.php?id=51

The wiring and the code running in the video can be found here:  http://forum.pjrc.com/threads/25579-UTFT-Library-with-ILI9341-2-2-Inch-240*320-SPI-TFT-LCD-Display?p=45676&viewfull=1#post45676
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Mano Biletsky's profile photoІван Мартинюк's profile photoLuke Seed's profile photoVictor Borah's profile photo
8 comments
 
Thank you. I saw those displays on ebay for $4.99 incl. shipping
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Robert Wozniak

Show-n-tell  - 
 
I scored some Brownie points, by printing a replacement handle for our waffle maker. The original handle broke off several years ago. The handle was designed using DesignSpark Mechanical, and printed on my Mendel90 printer with E3D hotend. The filament is 3mm Taulman Bridge Nylon. Right now I can't say enough good things about this filament. So far I'm at 100% successful prints with it, except for one where the filament kinked going into the feed tube, and starved the printer.

If I had one criticism of the Taulman Bridge Nylon:  I'd say please provide a spool with wider flanges. The current spools come filled to the rim, causing tangled uncoiling and spillover.
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Jack Taylor's profile photoTim Page-Brown's profile photoAshley Webster's profile photoVincent Tumasang's profile photo
14 comments
 
+Ashley Webster, you'll easily hit 264psi with a screw head tightened down.
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Robert Wozniak

General discussion  - 
 
I posted a comment over on Makers, Hackers, Artists and Engineers, the other day, with regard to Adafruit's announcment of its Makerbot prominant 3D printing guide, but it was promptly deleted, and comments and resharing disabled... hmmm

I suspected something like this might happen so snapped a screen-shot after I posted.
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Thomas Sanladerer's profile photoJustin Shaw's profile photoAnool Mahidharia's profile photoHelena Smith's profile photo
10 comments
 
+Thomas Sanladerer, those makers start out not "knowing any better", but because of the quantity and quality of Adafruits turtorials, they quickly are given the tools to create their own products.  This has enabled +WyoLum Emergents : Open Source Electronics
to create Open products that we could not have otherwise.  We thank Adafruit for freely sharing the design and source code for all of their products.  Think about it.  If a tutorial saves me a single hour, its value to me is $100.  They do not mark up that much.
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Robert Wozniak

General discussion  - 
 
Has anyone tried to slice and print one of the STL files from the new Smithsonian X 3D project?  I couldn't get it to load in Slic3r, and I'm still a newbie at using NettFab. The scans are extremely high resolution. The Blue Crab model shown has 2.6e+6 triangles.

Here's an article: about it from "The Verge":
http://www.theverge.com/2013/11/13/5100190/the-smithsonian-is-now-sharing-3d-scans-of-artifacts-with-the-public

Here's a link to the Smithsonian X 3D project site (registration req'd):  
http://3d.si.edu/browser
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Billy Zelsnack's profile photoAnthony Morris's profile photoChris Thompson's profile photo
3 comments
 
For this type of work I would probably use 3dcoat to voxelize it so the model is clean and then export it out at 300k or so for printing.
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People
Have them in circles
2,021 people
Jeff Graham's profile photo
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Work
Occupation
Chief Wind Tunnel Test Engineer
Skills
Jack of all Trades, Master of none
Employment
  • Boeing
    Chief Wind Tunnel Test Engineer, 1997 - present
  • Glenn L. Matin Wind Tunnel (U of MD)
    Wind Tunnel Test Engineer, 1987 - 1997
  • Old Dominion Speedway
    Pit Security / NASCAR, 1982 - 1986
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Media, PA
Previously
Columbia, MD - Laurel MD - College Park, MD - Dale City, VA - Stuttgart Germany (Patch Barracks) - Uncasville, CT - Fuerte Kobbe Panama - Forest Park, IL - Frankfurt, Germany
Story
Tagline
Most Curious Individual
Introduction
Most Curious Individual, Aerodynamic Researcher, Wind Tunnel Tester, Scientist, Uber Geek, Learner, Teacher, Lover of Nature, Passionate about our Planet, Tinkerer, Fixer, Maker, Boater, Beach Lover, Photographer, Proud Father, Fortunate Husband.
Education
  • Univ of Maryland
    Aerospace Engineering
  • NVCC Annandale
    Engineering
  • NVCC Woodbridge
    Mathamatics
  • Gar-Field SHS
    Hippie / Nerd
  • Godwin MS
    Brat / Dork
Links
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A Geek's Journal-1976: January 1st, 1976
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January 1st, 1976. As the year begins, I am 16 years old and somewhat depressed. I live with my wonderful parents and have a part-time job h