3d_modeling:fusion360 [Instructions]

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===== Fusion 360 =====

Designing for 3D printing

  * Dimension vertical holes 0.4mm bigger
  * Experiment with "Horizontal expansion" in Cura. Use negative values when the outer dimensions of parts are too big.
  * Clearance (guidance values. Need tuning for different machines, materials and temperatures).
    * 0.15mm: snug friction fit
    * 0.20mm: able to slide easily
  * Print slower (±30mm/s) for better accuracy. In Cura there's an 'engineering' print profile (only available for Ultimaker S5) that tunes parameters for best dimensional accuracy.


## Edit imported SVG files

  * import SVG curve
  * You can't edit this: only drag around sections of the curve. 
  * Make a new sketch and project the SVG curve into it. 
  * right click on the projected curve and select 'break link'
  * Now you can edit the curve directly
==== Import curve from CSV file ====

{{:3d_modeling:csv_curve.png?200|}}

Assuming the CSV file is for a 2D curve:

For ex:
<code>
0.36,22.16
0.54,22.24
0.72,22.32
0.89,22.40
</code>

  * Open CSV file in a text editor (with Regular Expressions functionality)
  * add a third column of placeholder numbers to the file ('',0'' for example) to make the data 3D. This is what Fusion expects.
    * Search & replace pattern in BBEdit: 
      * Search: ''(^.*$)''
      * Replace: ''\1,0''

After a replace-all: 

<code>
0.36,22.16,0
0.54,22.24,0
0.72,22.32,0
0.89,22.40,0
</code>

  * In Fusion 360, go to ''Utilities > Add-Ins''
  * Under the ''Scripts'' tab, Run ''ImportSplineCSV'' & open the changed CSV file.
  * Fusion will now generate a 2D sketch with the curve



==== Toolpaths ====

== Tip Rest machining ==
When using ''3D Adaptive'' to go down to a horizontal surface, tick the ''flat area detection'' box. Otherwise smaller mills in consecutive operations might need to remove material from the whole surface.

== Bore ==
The ''pitch'' parameter in the ''bore'' feature should be set depending on the width of the bore. For example: 
  * hole diameter: ''6,5mm'', pitch: ''0,18mm''
  * hole diameter: ''3,5mm'', pitch: ''0,08mm''

Small diameter bores need to feed down slower since they will be milled way too fast. //Also check if ramp speed controls the feed here//
==== Troubleshooting ====
=== Some sketch curves cannot be converted to profile edges ===
//Weird work-around//

{{:3d_modeling:sketch_curves_-_error_overview_web.jpg?600|}}\\
The problem edges show up in red when the warning is selected.

{{:3d_modeling:sketch_curves_-_problem_curve_web.jpg?600|}}\\
Zoom in on one of the edges.

{{:3d_modeling:sketch_curves_-_display_control_frame_web.jpg?600|}}\\
Right-click on the edge, and select ''Display control frame''

{{:3d_modeling:sketch_curves_-_control_point_selected_web.jpg?600|}}\\
A brown dotted line shows the control points. Select one of these points and delete it.

{{:3d_modeling:sketch_curves_-_review_warning_web.jpg?600|}}\\
In the lower left corner of the screen, right-click on the yellow sketch icon and select ''Review warning'' to check if it is solved or not.