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

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#Start with a Sketchup file. Start the print of tubing in a vertical position - with the base in the xy axis. You can draw in any position, but at end, group it and rotate it to stand vertically.
Start with an image of what we are trying to print -  
#Install plugin to sketchup. For Linux, see how to install plugins under Wine - simply place the plugin in the correct directory. For Windows, use skp_to_dxf.rbz. See [[Sketchup]] page on wiki - see links there. In Windows, do Preferences-Exension-Install Extension (choose location of extension). With it installed, go to Tools-Export and choose STL as the export format. Do not change the filename, as it will not recognize the file format later.
 
#With the STL export - you need to fix it for printing. Use cloud service for fixing files - cloud.netfabb.com. We are using all inch formats. This is a converter for fixing your files. It sends you a link of the fixed file. You can view the fixed file in STL or download it. Download the file.
[[Image:DSC 3829small.jpg|500px]]
#Use Slic3r to generate gcode for printing.
 
#Make sure that you upload the correct configuration file - use 0.35 nozzle draft. Upload the configuration every time you use slic3r.
and new design-for-fabrication model of frame:
#Open your repaired STL file. It should appear like it is for real.
 
[[Image:dfftractor.png|300px]]
 
Let's take [[TAZ]] and prototype the above tractor as a scale model:
 
[[Image:taz.jpg|500px]]
 
 


=Tractor 3D Printing Files=
=Tractor 3D Printing Files=
G
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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