GearHeads Corner
January 17, 2019, 02:10:36 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Search Login Register  
Pages: [1] 2 3 ... 10
 1 
 on: Today at 11:08:02 AM 
Started by BillM - Last post by BMeyers
B-CNC (before CNC and before gearotic) I made a few - Galton Box/quincunx.  And drew a few but never cut them. 

Didn't consider using Gearotic to create a dynamic model.  THANKS!

 2 
 on: Today at 01:38:24 AM 
Started by Kiyoshi Yoshii - Last post by Kiyoshi Yoshii
Hello, Bob

I am Very happy that you always enjoyed my works.
Thank you
Yoshii

 3 
 on: Today at 01:30:02 AM 
Started by Kiyoshi Yoshii - Last post by Kiyoshi Yoshii
Hello, BMeyers

I am glad that you enjoyed my works.
You use perfect Japanese!
Thank you
Yoshii

 4 
 on: January 16, 2019, 03:26:59 PM 
Started by Nate - Last post by Nate
For those of you who haven't seen it:

https://hackaday.com/2019/01/16/new-contest-3d-printed-gears-pulleys-and-cams/


 5 
 on: January 15, 2019, 10:35:18 PM 
Started by BillM - Last post by BillM
Art

I've decided to learn more about the Kinematic capabilit ies of the Augie Vector processor . Over the last few days I viewed some of you videos regarding the processor and duplicate d some of your examples.

I always like to stress the limits of programs so I built a simulatio n to demonstra te the binomial distribut ion.  The inspirati on for this model was a box that I had built decades ago when my kids were in 4th or 5th grade. The box contained BB's, a bed of nails, and catch bins that demonstra ted the effect of a sequence of binary events that over time form the bell shaped binomial distribut ion.

The first two attachmen ts are jpg's of the simulatio n near the end of the run.  The attached .vcp file contains the simulatio n and I also encapsula ted the whole mess in a .mech file.  It took eight tries to tweak the model to get a reasonabl e approxima tion to the distribut ion.

The simulatio n starts out with 800 small balls that fall onto a funnel object. The funnel is an attempt to create a single stream of balls to drop into the grid of pins.  I lost count of the number of pins.

I run the simulatio n ~40% rather than 100%. I do see some anomalies at higher speeds where some of the balls drop through the catch bins at the bottom of the model. Perhaps these anomalies are caused by the decimatio n of some of the objecs and the sheer number of collision s the  program has to calculate .

I don't think I'll do much more with this model.  The comb structure of the catch bins should be taller.  The sides of the funnel should be longer since some of the balls spill over the edges.

Is there any way to delete empty layers?  The method I stumbled upon was to create a mech file of the entire project, start a new project and then import the mech file.

I'm still a bit confused over the layers and the relations hip to the simulatio n.  I first built up my simulatio n model by importing DXFs each of which ended up on a different layer.  In order to run the simulatio n I moved all of the chains to the same layer.

If I build any more simulatio n models I'll probably build up the component s of the model and create .mech files from the component s.

Bill

 6 
 on: January 15, 2019, 10:09:16 AM 
Started by Confused - Last post by Nate
...
I've also considere d some other ideas, like having a set of circular gears driven by the same input, connected to the output by a pre-tensioned drive shaft that would be able to cope with the varying position of the output gear but would keep enough tension to have it chase the input gear when it's at risk of coming unmeshed; the big problem with that is that it's pre-tensioned, so will only drive the gear in one direction, and will tend to pull the gears free if it's run back.
...

Any other thoughts or suggestio ns?  Problems with the solutions suggested?  Obvious solutions I've missed?  Other things that would make this kind of gear untenable?

You could look into a toothed belt-and-pulley system instead of gears.

Using helical or herring-bone gears may help with meshing issues and is pretty easy to do when you're 3D printing the gears.  You can also do more sophistic ated things to mess with the tooth form, though I'm not sure how much that can help in practice.

It seems like making a linkage that handles the orbits crossing each other is going to be a challenge .


 7 
 on: January 11, 2019, 11:53:32 PM 
Started by Kiyoshi Yoshii - Last post by BobL
Happy New Year to you too Kiyoshi Yoshii. Thanks for posting links, always enjoy watching your stuff go. Well done.

Cheers
Bob
 Cool

 8 
 on: January 10, 2019, 07:33:37 AM 
Started by Kiyoshi Yoshii - Last post by BMeyers
delightfu l.
ありがとうございました!

 9 
 on: January 09, 2019, 08:48:00 PM 
Started by Richard Cullin - Last post by ArtF
Richard:

  Thx. I try not to get too obtrusive in the code base for Auggie, Ive forgotten
many of its developme nt details and it works well enough that I dont have to
play too often in the code. Leave sleeping dogs lie is probably the
better option.. Smiley

Art

 10 
 on: January 09, 2019, 05:25:31 PM 
Started by Richard Cullin - Last post by Richard Cullin
the pobus16cn c extender is only 14 eur ,  so i guess it not a big deal  to add it to the 57u . [when you know its needed]
it may not be cost effective to develop an alternati ve when auggie works so well as it stands

Pages: [1] 2 3 ... 10
Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!