Difference between revisions of "Old makerspace laser cutter"

Revision as of 15:55, 29 April 2015

Usage

1. Prepare your file to cut or engrave. You'll need a .dxf file with all the paths stroked at 0.25px, with each different color of the paths representing a different cut/engrave settings layer. You can find such files by searching on Thingiverse and other related sites, or creating your own with software such as Inkscape, Illustrator, Rhino, or many others. Unfortunately many of the files you find online are in .ai, .pdf or .svg, you'll need to open them in one of these apps and export them to .dxf.
2. Open the file in Laserworks. On the machine next to the laser cutter, plug in your USB key, and then import the .dxf via File > Import (ctr + i). If in the preview section you do not see the shapes, it means that you did not format your file correctly. The same applies if you import it and Laserworks says that it did not find any data.
3. Scale and arrange your paths. Once you have imported your .dxf, the paths in the file will be shown in Laserworks. You can either select all of the elements, or select just one of them, and scale using the black boxes on the sides, or by changing the values in the scale toolbar on the top. It is also possible to move your paths by clicking and dragging the pink cross in the middle. You can group your paths using the group button on the top toolbar.

• Always cut with lid closed
• Always wear safety goggles
• Do not leave the laser cutter cutting without supervision
• Always cut with the ventilation system on (black power strip under laser cutter)
• Only use materials that are laser safe - see list below (TL;DR: never use PVC, don't cut metal)
• Be careful whilst using the control panel or the software to not start the laser by accident
  • Be careful of the Pulse and Start-Pause buttons on laser cutter
  • Be careful of the Start button on laser cutter software (particularly when resuming from standby..)

This section is work in progress

Design software

Inkscape

1. Make sure object is vector (if you import a svg or make your own drawing, it will be already a vector; however png's and jpg's aren't vectors)
   1. Select object, then open the Trace Bitmap menu (Path > Trace Bitmap)
   2. Play with the various single scan options, and click 'update' to see a preview
   3. Convert the object to a path (Path > Object to Path)
   4. Set stroke (Object > Fill and Stroke) of object to 0.25px and no fill
   5. For every different layer you want to cut/engrave on the laser (aka engraved with different power for gradients), you must create a new color of the stroke
2. Save as as dxf (you need python-lxml for this part, apt-get install python-lxml or pip install lxml (doesn't work out of the box on mac))

Illustrator

Basic instructions

1. Getting started with Illustrator
2. Make sure that all the things you want to cut/engrave are paths with a 0.25mm stroke and no fill
3. Place all the paths into the root of a layer - Laserworks does not recognise sublayers, linked files or grouped paths
4. Each color you select for your paths will show up as a different settings layer in Laserworks (e.g. black lines can be set to cut, red lines set to engrave). Any layers in Illustrator will be merged.
5. File > Export as dxf, use R13/LT95 for the dxf format. Laserworks also supportes .ai files saved as Illustrator 8, but you may loose some editing functionality when saving with this, so be careful.

Text

1. Select your text and remove the fill, then set a stroke of 0.25
2. You must expand the text before importing it into Laserworks:
   1. When saving as dxf, select Outline Text
   2. Select text, then click Object > Expand. This will not allow you to edit the text afterwards, but works when saving as .ai

Bitmaps and images

1. Drag your image into illustrator, and click on Image Trace (use the arrow on the right to find the best settings, or press the settings button to custom set the settings)
2. Click the expand button

Rhino

Used by Swisskoo and marc

Autodesk Inventor

Used by Swisskoo

Laser software

The laser cutter is controlled by RDCam (version 5.2.06 installed on Atelier computer, other versions available on foo), it's manual is here File:Rdcam manual.pdf. When installing, you have to install it in 'demo mode', otherwise Laserworks won't open without a cutter connected (also don't forget to select english ;).

RDCam would not install in crossover (gui for wine), but feel free to try. Please note that .rld files created in different versions of the software are not inter-compatible unfortunately. This guy started reverse engineering the (scrambled) communications and .rld protocols, he has also managed to get it to work on wine.

File:Rdcam manual.pdf

Materials

Wood

4mm wood - 28-45mm/s @ 100% for cutting, depending on location on laser bed. 35 is a good average. Engraving is good at 500mm/s, you can engrave from 6% to 30-50-60% ish - this needs to be further clarified. 15-20% with a 0.2 interval gives a good clean result.

6mm wood - 20-30mm/s

Cardboard

40mm/s

Paper

No testing done yet

Acrylic

8-20mm/s, engraving at 20% 500mm/s

Others

There still needs to be extensive testing done to see which materials work and which don't, but basically the gist of it is: don't use anything that has PVC in it, and don't use metal (unless for engraving -> need to explore options). There have been some tests with rubber (for stamps) as well, this needs to be properly documented and more testing needs to be done.

Hardware

Search terms: Ebay 100w laser or just 100w laser - it's a generic design (3500~4000 usd for laser cutter with/without shipping depending on source, ~1000 usd for laser tube with shipping). RD-ACS controller (generic controller so used in lots of laser cutters).

Photos

Wood

Cardboard

Acrylic

Others