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Neal Grieb
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Neal Grieb

General discussion  - 
 
Just curious, I own a DaVinci 1.0 and I guess I've never thought about the auto calibration...is it using a temp spike on the thermistor to tell when it touches?
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Harley Morrison's profile photoNeal Grieb's profile photo
2 comments
 
No mention of the method...it just magically happens. XYZPrinting doesn't have the best documentation.
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Neal Grieb

Custom-built & Reprap  - 
 
I've been slowly working on the layout for my custom build. I'm really stuck on the idea of having some sheet metal parts machined and folded for the build. Has anyone else in the community done this? Is there a large cost (I know this is highly dependent on the part geometry but did you feel it was outrageous )? Any suggestions/comments are welcome it is always nice to have other points of view.
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Jonathan Lussier's profile photoNeal Grieb's profile photoDavid Simmons's profile photo
14 comments
 
+Neal Grieb true. And heli-coils and pem nuts are expensive. Nutserts aren't so bad I guess. But for 3d printers yeah, bolts and nuts make more sense for parts that get serviced often.
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Neal Grieb

General discussion  - 
 
I've been having a slight issue with my Da Vinci 1.0 printer. I had just replaced the nozzle a few weeks back, and just recently started printing a larger number of parts in succession again. Everything was doing unbelievably well until this week. These are printed using the same layer thickness...see the difference? Anyone know where the problem may lie?

The only thing I can think of is a change in humidity levels... 
5
Evan Nguyen's profile photoNathan Walkner's profile photoNeal Grieb's profile photo
6 comments
 
Solved the problem by printing something less round. The real culprit was a scratchy linear bearing on the x axis. Sounded good one way...but on the way back...grrrr.

Couldn't see or hear it while doing the tight circles used in the chess pieces.
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Neal Grieb

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Was trying to do some gear design and found this:

http://geargenerator.com/#400,400,400,6,0,0,1380.5999999999738,2,1,10,0.3125,32,20,-90,0,0,24,0.75,32,20,-90,0,0,2,806

Hope this helps others as well. I find CAD gear design to be a bit tedious and painful. Amazing!
Gear Generator is a tool for creating involute spur gears and download them in SVG format. In addition it let you compose full gear layouts with connetcted gears to design multiple gears system with control of the input/output ratio and rotation speed. Gears can be animated with various speed to demonstrate working mechanism
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Neal Grieb

commented on a video on YouTube.
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Unfortunately this incredibly selfish and screwed up claim may have a scientific basis: http://www.ted.com/talks/william_li

I only hope she didn't pull focus and attention from these actual doctors who are trying hard to find different solutions to a shockingly misunderstood illness.

Neal Grieb

General discussion  - 
 
I'm not extremely familiar with the SLA process, other than the fact that photo resin is hit with a UV laser, but have been thinking about the possibility of a rotary style printer. Does anyone know if it has been done before? I'm thinking a slotted wheel with the head/laser much like a CD player...
1
Neal Grieb's profile photoWhosa whatsis's profile photoJames Kao's profile photo
10 comments
 
Oxygen inhibition is all the rage from the Carbon3D videos, but it's not necessary to get too carried away with that tech. There are plenty of ways to SLA print without it.
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Neal Grieb

General discussion  - 
 
Itching for a test flight.

I know that this has been done before, but was wondering if anyone in the community has tried and succeeded. I'm using a Da Vinci 1.0 ( so, so far this has been complicated). 
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Mark “MARKSE” Emery's profile photoNeal Grieb's profile photo
8 comments
 
I've tried cold acetone vapor smoothing, but don't have the equipment to try the more dangerous hot technique. It did smooth the part quite a bit and gave me a nice sheen, but also turned out slightly hilly where there were thinner areas of material. I'm thinking if I can't remove the small ridges they would simply result in a more gradual bumpy surface. Also, the last time I attempted the cold method it didn't work for some reason...not sure why.
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Have him in circles
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Neal Grieb

Custom-built & Reprap  - 
 
I'm looking to slowly put together a custom build, and am currently laying out the mechanical components. I was wondering if the community has any preferences when it comes to securing guide rods and linear bearings, and why. The ones that come to mind are:

1) Threaded End Internal/External Tap (It would be cool if they made bearings with an external thread)
2) Simple Press Fit 
3) Perpendicular Pinning or Set Screws
4) Retaining Ring Grooves
5) Capping Flange
2
Jeff Dewe's profile photoNathan Walkner's profile photoNeal Grieb's profile photo
6 comments
 
I'm trying something new. I posted a simple diagram a few weeks ago if you care to check it out. The guide rods are in the core-xy style though.

I own a DaVinci 1.0, and know it uses internally threaded guide rods (which is probably a great way to go), and some odd clip like bearing holding surfaces (but I can't stand their linear bearings or clip style).

My issue with pre-threaded rods I have found on the internet is that many are expensive and don't generally have a finish (I was reading and watching videos that suggested a chrome coat helps considerably). I know it isn't a requirement, but it sounds like it helps quite a bit.

Of course one may be able to simply tap the end of regular guide rods.
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Neal Grieb

General discussion  - 
 
I've been thinking a lot about the advantages of different printer types, and was curious if anyone has ever tried this (I'm currently dubbing it the Alpha-Y type until I have an official name)? Thoughts? Surely this has been attempted...

My picture is color coded to show my intent. Motor 1 controls the blue carriage assembly, motor 2 the red. My initial thoughts on the matter (I have not done the math though) the angle change may make smaller and consistent z-steps tough, and the x-axis guides need to be twice the length of my z-height in order to give me the same build area throughout the print.

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Daid Braam's profile photoHarry H. Krabbe's profile photoRyan Carlyle's profile photoNeal Grieb's profile photo
22 comments
 
+Ryan Carlyle that was my initial plan. The parallel arms were not meant to be ball joints. I was planning on having a solid H arm truss with some ball bearings in that plane (the diagram is just being simplistic).

Even with a stiffened carriage arm, at high accelerations I see a possibility for slight rotation (unless you have amazing tolerances upon build).

I'll design it up and repost STLs if someone wants to try it...let me know what happens.
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Neal Grieb

Show-n-tell  - 
 
DaVinci 1.0 printing magic. I'm totally shocked this worked out. The new print head assembly seems to do much better. Any one else have the newer generation head? What are your thoughts?
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Adam Steinmark's profile photoNathan Walkner's profile photoNeal Grieb's profile photo
7 comments
 
True, but unfortunately the R&D is happened after they sold thousands of barely tested products.

Just be careful to check the connector to the heater element if you still have the old black connector. I think they noticed that the vapor from the water based glue stick was getting into it and corroding the pins...hence the new full jacket. My connector was heating up instead of transmitting the voltage and current to the printer head, which could have resulted in a nice meltdown/fire.
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Neal Grieb

General discussion  - 
 
Does anyone know if there had been any initiative to build smart slicers tuned for things like thermal stresses, shortest paths, and least amount of support material? I'd love to try to create/help with some slicer software.
1
Nick Parker's profile photoJeff DeMaagd's profile photoNeal Grieb's profile photo
3 comments
 
 I think it is very possible to do what you are saying, and it would be very fast to change the layer thickness using surface projection on the analytical geometry. I'll get crackin' on it. This can go on my projects list right behind everything else...so like 2 years from now ;-)
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Neal Grieb

commented on a video on YouTube.
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Sony is so behind the game. That price is insane. Check out the Cowon players if you want great audio and long battery life. The X9 has 110 hr music listening life.
People
Have him in circles
27 people
John Mousel's profile photo
Aubrey Portwood's profile photo
Josh Taylor's profile photo
My cast polyamide's profile photo
m st (spRead  THE BOOK OF TRUTH)'s profile photo
Dekani Fisher's profile photo
Arbuba Llc's profile photo
Justin Lee's profile photo
Mark Rodarte's profile photo
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Mechanical Engineer
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Mechanical Engineering (Design, Drafting, Fluid Dynamics, Programming, etc.), Art (Traditional & Digital)
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  • Mechanical Engineer, 2011 - present
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Neal Grieb's +1's are the things they like, agree with, or want to recommend.
Piano
market.android.com

Piano is a Virtual Piano on your Android device, featuring Piano, Xylophone and Synthesizer sounds. Practice songs, make music or just have

Notepad
market.android.com

Notepad is a simple, easy-to-use note-taking app. It has selectable text size, searching, sorting, and the ability to send the note.