Lulzbot TAZ Tractor Scale Model 3D Printing Tutorial: Difference between revisions

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[[Image:dfftractor.png|300px]]
[[Image:dfftractor.png|300px]]


=Parts Count=
Let's take [[TAZ]] and prototype the above tractor as a scale model:


Welcome to Tractor Stone Soup. Please pick a part. There are 24 of you, and 3 days until my dogfood session at 16:40 on Wednesday. Therefore, everyone gets an hour of printing time of we divide 3 days (24 hours) between everyone. Please sign up for the time day of printing. The printer will also be available for or an overnight printing session, for which 2 file sets are included: one for Monday, and one for Tuesday. each person gets to pick a part and print it. Estimated printing times are included.
[[Image:taz.jpg|500px]]
 
 
 
=Tractor 3D Printing Files=
We observed that simply scaling the 1/4"x4"x4" tubing of Lifetrac by 8x (to generate 1/2" tubing) resulted in a 1/16" wall thickness instead of 1/32". So scaling is not working. We need to draw these tubes manually.
 
The tubes for 3D printing are 1/32" wall thickness x 1/2"x1/2" tubing. Draw these in sketchup by extruding a 1/2" square, then offsetting for a 1/32" face, to punch out the middle. Make sure that you offset for punching out the middle of the tube before extruding the holes.
 
To draw the holes, draw the first hole at 1/4" away from the middle of the edge
 
*[3x] 11 hole tube- tops transerse -
*'''[2x] 17 hole tube- top parallels''' -
*'''[4x] 13 hole tube- front verticals''' -
*[5x] 15 hole tube- 2 rear verticals, 3 bottoms transverse
*[4x] 19 hole tube- bottom parallels
*[10x] pivot plates
*[3x] hollow shaft
 
Loader:
*'''[2x] 8 hole tube - forearms'''
*'''[2x] 16 hole tube - arms'''
*'''[2x] 14 hole tube- attachment plate
*'''[4x] 4 hole connector plate (4"x16" in real life)'''
 
Wheels:
*4" tall compared to 1/2" tubing

Latest revision as of 06:26, 26 May 2013

Start with an image of what we are trying to print -

DSC 3829small.jpg

and new design-for-fabrication model of frame:

Dfftractor.png

Let's take TAZ and prototype the above tractor as a scale model:

Taz.jpg


Tractor 3D Printing Files

We observed that simply scaling the 1/4"x4"x4" tubing of Lifetrac by 8x (to generate 1/2" tubing) resulted in a 1/16" wall thickness instead of 1/32". So scaling is not working. We need to draw these tubes manually.

The tubes for 3D printing are 1/32" wall thickness x 1/2"x1/2" tubing. Draw these in sketchup by extruding a 1/2" square, then offsetting for a 1/32" face, to punch out the middle. Make sure that you offset for punching out the middle of the tube before extruding the holes.

To draw the holes, draw the first hole at 1/4" away from the middle of the edge

  • [3x] 11 hole tube- tops transerse -
  • [2x] 17 hole tube- top parallels -
  • [4x] 13 hole tube- front verticals -
  • [5x] 15 hole tube- 2 rear verticals, 3 bottoms transverse
  • [4x] 19 hole tube- bottom parallels
  • [10x] pivot plates
  • [3x] hollow shaft

Loader:

  • [2x] 8 hole tube - forearms
  • [2x] 16 hole tube - arms
  • [2x] 14 hole tube- attachment plate
  • [4x] 4 hole connector plate (4"x16" in real life)

Wheels:

  • 4" tall compared to 1/2" tubing
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