Profile

Cover photo
Whosa whatsis
Works at Deezmaker
Attends University of Autodidacticism
1,603 followers|1,152,258 views
AboutPostsPhotosYouTube+1's

Stream

Whosa whatsis

Shared publicly  - 
 
Maslows_hierarchy[] normally looks like this:

{Physiological needs, Safety needs, Love and belonging, Esteem, Self-actualization}

But some days, it looks like this:

{Coding, Coding, Coding, Coding, Coding}

My guess is that there's a buffer overflow vulnerability that allows it to be overwritten this way.
8
Add a comment...
 
Why hasn't anybody made a small motor controller to that uses an encoder and takes step/dir signals in a format compatible with a pololu driver so that we can use servos as drop-in replacements for steppers on printers yet? I would think there should be chips designed to do this, but even if it requires a microcontroller and a separate H-bridge, it shouldn't be difficult...
3
1
Jan Kako's profile photoBrad Hopper's profile photoKevin LaSanders's profile photoMike Creuzer's profile photo
 
A couple of interesting ideas here. Looks more like a CNC mill's toolpath than a printer's. Shallow-angled nozzles need not apply.
39
7
Camerin hahn's profile photoScott Leighton's profile photoWes Brown's profile photoNick Parker's profile photo
15 comments
 
+paul mplr that's where I've been looking with all this. Arbitrary layer shape should allow you to mitigate layer interface weaknesses in an appropriate way for your application.

Also, for ninjaflex and similar, you could manipulate flexibility with layer shape.
Add a comment...

Whosa whatsis

Shared publicly  - 
 
Something like this might make a good Z probe, able to detect an aluminum heat spreader on the platform.
3
1
Paulo Kiefe's profile photoMiguel Sánchez's profile photoerik vdzalm's profile photo

Whosa whatsis

Shared publicly  - 
 
We've been printing a lot of these for giveaways at the shop. A set of 6 prints in 1.5 hours on a Bukito, and we usually have a couple of them running to maintain our supply (also a good way to keep them active as demo units). One of these, days, I'll get around to posting the files...
39
Whosa whatsis's profile photoLaura Thomas's profile photoLaird Popkin's profile photoPete Weller's profile photo
15 comments
 
Nice!
Add a comment...
Have him in circles
1,603 people

Whosa whatsis

Shared publicly  - 
 
I still want to see patents abolished, but this is the next best thing.
5
Billy Zelsnack's profile photoCamerin hahn's profile photojl roberts's profile photoStephen Baird's profile photo
9 comments
 
+Billy Zelsnack where does the money to pay for the lawyers come from... the sale price of the products. lawyers dont work for free...
Add a comment...
 
Oh, tiny microcontroller dev boards that I already have too many of and will probably never get around to using, I wish I knew how to quit you.
19
2
Justin Walterich's profile photoCoco Jx's profile photoHaroon Rasheed's profile photo
 
I got "onboard" this one also.
Add a comment...

Whosa whatsis

Shared publicly  - 
 
The skanbot fits in my tiny car without disassembly, and it will fit even more easily once I get the new, more compact turntable mechanism working. This one is from an old project and is bigger than it needs to be.
3
Add a comment...

Whosa whatsis

Shared publicly  - 
 
Another printer resulting from the race to the bottom.

I saw early shots of this that looked like it was an H-bot, but this one appears to have a rack-and-pinion X axis. Y has loops of belt that I'm guessing are driven by spinning the four Z-axis smooth rods, which would in run need to be D-shaped or have slots milled in them to allow pulleys to turn with them while still sliding vertically, similar to this concept for an off-carriage extruder motor: http://garyhodgson.com/reprap/2012/01/experimental-off-carriage-extruder-motor/

Of course, for the pulleys to be loose enough to slide freely, I suspect that a bit of backlash in these pulleys will be impossible to avoid.
5
Andreas Thorn's profile photolinco matic's profile photoArthur Wolf's profile photoJohn Driggers's profile photo
8 comments
 
They claim to have their own custom idiot proof software. Yet, their video shows Pronterface running in at least 2 shots
Add a comment...

Whosa whatsis

Shared publicly  - 
 
These results are surprisingly dramatic. From the picture, I suspect that the knurled drive used by the +Ultimaker is part of the problem. I should set up a similar test with one of our Tatsu drive gears.
As I've experimented with different print styles and slicers, and especially as I've  been helping new users who are wrestling with printers that seem utterly unwilling to cooperate, I've become mo...
20
3
Camerin hahn's profile photoAshley Webster's profile photoTom Øyvind Hogstad's profile photoDale Dunn's profile photo
6 comments
 
These results aren't that surprising to me. The fact that the drive wheel of any design is leaving permanent marks on the filament means that the filament is being permanently deformed by the forces applied by the impinging tooth of the drive wheel. A drive wheel that is turning will apply some of its force, and therefore some of the deformation along the length of the filament. And the more force applied along the length, the greater the deformation along the length. So, there will always be some amount of extruder "slip", proportional to the back pressure in the nozzle.

What this means is that the effective extruder steps per mm will be different for each extrusion condition (a combination of speed and layer height). We calibrate e-steps per mm extruding into air at some arbitrary rate, then apply an "extrusion multiplier" fudge factor to correct the extrusion rate on an actual test print.

So, until we start measuring filament diameter and speed going into the drive, we will need different calibrations for different speeds and layer heights. Or, we could find a way to drive the filament in a way that doesn't significantly deform the filament or any part of the drive mechanism at the same time that it's pushing the filament. The only real difference between drive wheels in use now is how much slip can be tolerated before they strip the filament entirely.

This suggests to me the idea to have have two "drive" wheels in the extruder. One undriven to imprint the filament with a grippable shape and the second one driven to feed the filament without applying additional lengthwise deformation. I don't know if sufficient drive force to extrude at speed can be applied without inducing significant lengthwise distortion, if that speed would be an improvement over what we're doing now.

Add a comment...
People
Have him in circles
1,603 people
Work
Occupation
Professional Maker
Employment
  • Deezmaker
    2012 - present
Basic Information
Gender
Male
Story
Tagline
Polymathic autodidact
Introduction
On a good day, I'm an iconoclastic, autodidactic polymath. The rest of the time I'm just a cynical, dilettantish tinkerer.

Also, I make stuff.
Bragging rights
Designer of Reprap Wallace
Education
  • University of Autodidacticism
    present
  • Internet School of All Human Knowledge
    present
Whosa whatsis's +1's are the things they like, agree with, or want to recommend.
Deezmaker Introduces Bukito Portable Mini Printer Kit #3dthursday
www.adafruit.com

One of the new models launching at Maker Faire Bay Area this year that caught my eye was the Deezmaker Bukito — a capable, affordable, porta

Canny Machines
www.cannymachines.com

OpenSCAD Dimensioned Drawings. Tags: openscad · dimensioning in OpenSCAD. Dimensioned Drawings with OpenSCAD. OpenSCAD is an open-source pro

Ultra-high-molecular-weight polyethylene - Wikipedia, the free encyclopedia
en.wikipedia.org

Ultra-high-molecular-weight polyethylene (UHMWPE or sometimes shortened to UHMW), also known as high-modulus polyethylene (HMPE) or high-per

Stepper motor - RepRapWiki
reprap.org

What is a Stepper Motor ? Stepper motors are one kind of electric motor used in the robotics industry. Stepper motors move a known interval

Project Glass
plus.google.com

Thoughts, designs, and stories.

Re: [MakerBot] Hot end mod - Google Groups
groups.google.com

Re: [MakerBot] Hot end mod. It's kinda hard to see, here's an illustration and a better photo. The cuts start around 12mm away from the thre

Google Drive
drive.google.com

Access everywhere. Google Drive is everywhere you are—on the web, in your home, at the office and on the go. So wherever you are, your stuff

Pleasant Software - Pleasant3D
www.pleasantsoftware.com

Pleasant Software for the Macintosh - Podcasting solution, iChat enhancement and more

Polyimide - Wikipedia, the free encyclopedia
en.wikipedia.org

[edit] Classification. According to the composition of their main chain, polyimides can be: Aliphatic (linear polyimides),; Semi-aromatic,;

RepRap Wallace by whosawhatsis - Thingiverse
www.thingiverse.com

Thingiverse is a universe of things. Download our files and build them with your lasercutter, 3D printer, or CNC.

Acrylonitrile butadiene styrene - Wikipedia, the free encyclopedia
en.wikipedia.org

Acrylonitrile butadiene styrene (ABS) (chemical formula (C8H8)x· (C4H6)y·(C3H3N)z) is a common thermoplastic. Its glass transition temperatu

Printable solar cells that can be folded up when not in use - Hack a Day
hackaday.com

Here's a photovoltaic cell that can be printed onto paper. The manufacturing technique is almost as simple as using an inkjet printer. The s

Kickstarted: Finding Space (and Making a Makerspace)
blog.makezine.com

For many maker pros, finding the right amount of space can be difficult. One makerspace, Artisan's Asylum, is offering a different model.

Is One of Our Open Source Heroes Going Closed Source?
blog.makezine.com

A new player on the field by the name of Tangibot recently arrived, not with a new printer or even an innovative new derivative, but with a

Filament Tolerances and Print Quality | ProtoParadigm
www.protoparadigm.com

Filament Tolerances is a subject that doesn't get much discussion, yet is arguably the most important quality to look for when choosing a pl

Android Terminal Emulator
market.android.com

Access your Android's built-in Linux command line shell. Unleash your inner geek! Want to know more? Check out the wiki: http://github.com

StepStuck
hydraraptor.blogspot.com

When I built my Mendel I used A3977 stepper drivers. Before that I did some maths to show that the component values need to be carefully sel

How to view open Android Chrome Beta tabs in Chrome desktop
howto.cnet.com

Trying to view open tabs from an Android device in the desktop client didn't seem possible, but a savvy Twitter follower saves the day. Read

Pololu - Stepper Motor: Bipolar, 200 Steps/Rev, 35x36mm, 2.7V, 1000mA
www.pololu.com

This hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 1000 mA at 2.7 V, allowing for a holding t