1 Topic by mark.burhop (edited by mark.burhop 2013-05-12 19:23:28)

  • mark.burhop
  • mark.burhop
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Topic: 2009 Dodge Charger iPhone device

Hi all,

Below is a project I dd with my SolidDoodle on the Local Motors site (open source automotive design).  It was really more of a learning exercise on a few things:

  • ABS (and warpage and rafting)

  • PLA.

  • Press fit and friction (or lack of friction with PLA)

  • Doing something practical instead of desk ornaments

  • Best design for overhangs

I need to better design the assembly to get a bit more rigidity but it basically works.

The project:
https://forge.localmotors.com/pages/pro … p?cg=11568

Finished product:
https://images.localmotors.com/user_images/501127.jpg

https://images.localmotors.com/user_images/501134.jpg

SD2, glass bed, MK5 setup with E3D lite extruder
NX and Solid Edge CAD user
PI, Galileo, and arduino hacker
Code Monkey and Twitter user @burhop

mark.burhop's Website

2 Reply by Charles_Xavier

  • Charles_Xavier
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Re: 2009 Dodge Charger iPhone device

Looks good!Any trouble with overhangs on that bottom piece?

3 Reply by mark.burhop

  • mark.burhop
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Re: 2009 Dodge Charger iPhone device

On overhangs, yes.  I originally had a curved bucket and got a hairy mess at the bottom.  I changes the design to a 45degree taper with a small horizontal flat about about 4 mm that could be bridged.  This made for a much smoother part.

It was a good manufacturing lesson.  Rounds are good with "subtractive manufacturing".  Chamfers work better with "additive manufacturing"

SD2, glass bed, MK5 setup with E3D lite extruder
NX and Solid Edge CAD user
PI, Galileo, and arduino hacker
Code Monkey and Twitter user @burhop

mark.burhop's Website

4 Reply by Charles_Xavier

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Re: 2009 Dodge Charger iPhone device

That is exactly what I thought you'd find. : )

Depending on what your personal settings are, you can increase the overhang angle quite a bit. I have a friend who can finally print horizontal cylinders starting at 80 degrees and he's thrilled.

Great project! The kind of thing were people just need to measure a few things to adapt to their own car. (Or if you're really ambitious, you could model up iterations for the most common vehicles!)

5 Reply by IanJohnson

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Re: 2009 Dodge Charger iPhone device

How is the hinge working out for holding up the phone?  I tried a holder that used a printed ball joint, and I could never get enough friction for it to support the weight of the phone.  It came down to the plastic being too slippery, and I think the ball not being smooth enough due to the layers to have enough surface contact.

6 Reply by mark.burhop

  • mark.burhop
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Re: 2009 Dodge Charger iPhone device

A ball joint would be nice if you could get it to work.

For me, the hinge works great if you want something strong and friction free.  I was worried about it coming apart too easily which was not a problem.

Of course, like you, I wanted friction which was a problem. Now I'm thinking about adding some kind of ratchet mechanism.

SD2, glass bed, MK5 setup with E3D lite extruder
NX and Solid Edge CAD user
PI, Galileo, and arduino hacker
Code Monkey and Twitter user @burhop

mark.burhop's Website