Laser-cutting Inspiration - Revision history

Roboguy: /* Stacked Slices */

2017-04-22T07:35:17Z

‎Stacked Slices

Roboguy: Roboguy moved page Laser-cutting to Laser-cutting Inspiration: link from machine page

2017-04-21T23:17:37Z

Roboguy moved page Laser-cutting to Laser-cutting Inspiration: link from machine page

Roboguy: /* Source Image */

2017-04-19T20:12:50Z

‎Source Image

Roboguy: /* Source Image */

2017-04-19T20:10:37Z

‎Source Image

Roboguy: /* Source Image */

2017-04-19T18:28:18Z

‎Source Image

Roboguy: /* Stacked Slices */

2017-04-19T18:22:20Z

‎Stacked Slices

Roboguy: /* Stacked Slices */

2017-04-16T13:46:44Z

‎Stacked Slices

Roboguy: /* Stacked Slices */

2017-04-16T13:44:45Z

‎Stacked Slices

Roboguy at 11:11, 16 April 2017

2017-04-16T11:11:00Z

Roboguy: /* Design for 3D */

2017-04-16T11:07:11Z

‎Design for 3D

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 * Duplicate each of these 2, and re-size copies to 200 and 205 mm wide.
 * Position each large shape around the smaller shape (200 & 100, 205 & 105 mm). In ‘Align & Distribute’, set ‘Relative to first selected’, then select small shape & large shape, & click icon to centre vertically & another to centre horizontally. Two pairs of shapes should be displayed, 1 pair slightly larger than the other.
-* Extensions > Generate from Path > Interpolate, & (eg) 9 steps. This creates a series of rings around the smallest shape. Repeat for the 2nd pair. These 2 sets of rings are now ready for laser-cutting - with minimal material waste.
+* Extensions > Generate from Path > Interpolate, & (eg) 9 steps. This creates a series of rings around the smallest shape. Repeat for the 2nd pair.
-* After laser-cutting, alternate rings from the 2 sets may be stacked on top of each other to make a bowl.
+* Note that the inner & outer rings look bolder because there's a duplicate of each. So, click the inner ring, drag single ring away & delete. Repeat for outer ring, & second set of shapes.
 * Star shape can be used to create stacked bowl from single set of rings. Experiment with number of corners (eg 20), amount of rounding (eg 0.04) and spoke ratio (eg 0.87).

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 * To transform a JPG line drawing, open the image, & copy to a blank template file: Edit > Select All (<Ctl> & ‘A’), Copy (<Ctl> & ‘C’), then Edit Paste (<Ctl> & ‘V’).
 * Select All, then Path > Trace Bitmap, with settings Brightness Steps = 2, & Remove Background. The new path is overlaid directly over the original image. Click & drag the new top copy away, then select & delete the original version from underneath.
-* Image may have unwanted lines around outline if scanned/ photographed from paper original. Remove by using 'Node' tool (2nd icon down left column): select each end of line, then <Del>. Also for working with nodes/ segments, review dotty icons in bottom row at top of screen.
+* Image may have unwanted lines around outline if scanned/ photographed from paper original. Remove by using 'Node' tool (2nd icon down left column): select each end of line, then Delete. Also for working with nodes/ segments, review dotty icons in bottom row at top of screen.
 * Saving this file without altering could result in a large file, & long cutting time - depending on drawing's complexity. Use Path > Simplify Path to produce a smaller file with shorter cutting time.
 * Where a 2-tone (eg paper cut) image is loaded, convert with Path > Edge Detection, colours  = 2.

@@ Line 24: / Line 24: @@
 * To transform a JPG line drawing, open the image, & copy to a blank template file: Edit > Select All (<Ctl> & ‘A’), Copy (<Ctl> & ‘C’), then Edit Paste (<Ctl> & ‘V’).
 * Select All, then Path > Trace Bitmap, with settings Brightness Steps = 2, & Remove Background. The new path is overlaid directly over the original image. Click & drag the new top copy away, then select & delete the original version from underneath.
-* Image may have unwanted lines around outline if scanned/ photographed from paper original. Remove by using 'Node' tool (2nd icon down left column): select each end of line, then [use dotty icons in bottom row at top of screen to delete segment?]
+* Image may have unwanted lines around outline if scanned/ photographed from paper original. Remove by using 'Node' tool (2nd icon down left column): select each end of line, then <Del>. Also for working with nodes/ segments, review dotty icons in bottom row at top of screen.
 * Saving this file without altering could result in a large file, & long cutting time - depending on drawing's complexity. Use Path > Simplify Path to produce a smaller file with shorter cutting time.
 * Where a 2-tone (eg paper cut) image is loaded, convert with Path > Edge Detection, colours  = 2.

@@ Line 23: / Line 23: @@
 ==== Source Image ====
 * To transform a JPG line drawing, open the image, & copy to a blank template file: Edit > Select All (<Ctl> & ‘A’), Copy (<Ctl> & ‘C’), then Edit Paste (<Ctl> & ‘V’).
-* Select All, then Path > Trace Bitmap, with settings Brightness Steps = 2, & Remove Background. The new path is overlaid directly over the original image. Click & drag the new copy away, then select & delete the original version.
+* Select All, then Path > Trace Bitmap, with settings Brightness Steps = 2, & Remove Background. The new path is overlaid directly over the original image. Click & drag the new top copy away, then select & delete the original version from underneath.
 * Image may have unwanted lines around outline if scanned/ photographed from paper original. Remove by using 'Node' tool (2nd icon down left column): select each end of line, then [use dotty icons in bottom row at top of screen to delete segment?]
 * Saving this file without altering could result in a large file, & long cutting time - depending on drawing's complexity. Use Path > Simplify Path to produce a smaller file with shorter cutting time.

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 ====== Stacked Slices ======
 * Horizontally sliced bowl: create 2 sets of rings, but 1 slightly bigger than the other, then stack by picking alternately from the 2 sets - each ring overlaps with the adjacent rings above and below it. The full method is described here: https://www.instructables.com/id/Stacked-Laser-Cut-Bowls/
-* Create a shape & modify it. A polygon may be selected via polygon/ star icon, & the number of corners selected (eg 5 for pentagon) - see menus across top. Corners may be rounded, eg set to 0.15. Use 'Node' tools to manipulate shape further - eg curving edges to be convex or concave, but avoid tight turns in the shape.
+* Create a shape & modify it. A polygon may be selected via polygon/ star icon, & the number of corners selected (eg 5 for pentagon) - see menus across top. Corners may be rounded, eg set to 0.15.
 * Size, eg, to 100mm wide
-* Right-click on shape & Duplicate. Drag duplicate away from original & size to, eg, 105 mm wide.
+* Right-click on shape & Duplicate. Drag duplicate away from original & size to, eg, 105 mm wide. To keep proportions, set top padlock icon to locked - height & width kept in same aspect ratio.
 * Duplicate each of these 2, and re-size copies to 200 and 205 mm wide.
 * Position each large shape around the smaller shape (200 & 100, 205 & 105 mm). In ‘Align & Distribute’, set ‘Relative to first selected’, then select small shape & large shape, & click icon to centre vertically & another to centre horizontally. Two pairs of shapes should be displayed, 1 pair slightly larger than the other.
 * Extensions > Generate from Path > Interpolate, & (eg) 9 steps. This creates a series of rings around the smallest shape. Repeat for the 2nd pair. These 2 sets of rings are now ready for laser-cutting - with minimal material waste.
 * After laser-cutting, alternate rings from the 2 sets may be stacked on top of each other to make a bowl.
 ====== Interlocked Slices ======

← Older revision	Revision as of 23:17, 21 April 2017
(No difference)

← Older revision		Revision as of 11:11, 16 April 2017
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		+
		+	== Overview ==
		+	A good overview to a range of issues is provided by: https://www.instructables.com/id/Laser-Cutting-Basics/

	== Inkscape File Editing ==		== Inkscape File Editing ==

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 * [Method yet to be explored]
 * This example shows how to make a bowl from interlocked slices, but not just using Inkscape: https://www.instructables.com/id/Fancy-Wooden-Fruit-Bowl-With-123D-Make/
 ====== More Complex 3D Design ======