In this FAQ for the Laser Cutters we will be listing all the questions people have and attempt to answer them or link to answers. This will serve as a single searchable page for questions.
Q: Who should come to the Laser Meetup?
- Anyone who is interested or curious even if you don't have a design in mind.
- Anyone wanting to get help on a design or time cutting a project (you don't need to be certified ahead of class)
- Kids can come as well, but anyone under 18 must have an adult parent or guardian with them.
Q: How do I keep my material in place?
- Taping things to the rails with a bit of tension so it doesn't slide left and right.
- You can use the honeycomb and put T pins in them. There should be some in the drawer. To access the drawer of the medical cart use the code 1234 to unlock.
Q: Why did I hear something beep 5 times?
- That could be the medical cart locking. Not a problem.
Q: Is the 80 W laser log accessible on both computers?
Q: How do I design a project for the laser cutter? OR What software do I use to design a project for the laser cutter?
- You can use either CAD or vector graphics software
- For CAD tools Fusion 360 and Solid Works are the most commonly used, but any CAD software should export dxf files needed.
- For vector graphics software Adobe Illustrator and Inkscape are the most common, although corel Draw and other are often used.
- For vector design a common starting point is tracing an raster image to create a path
- There are also online generators for things like boxes, puzzles, mazes and more.
- You can also search online for project ideas at sites like https://www.instructables.com/, https://www.thingiverse.com/, or similar sites.
- This YouTube video has a summary on 60 laser cut projects with links to tutorials that may be good inspiration.
- You can buy design files on Etsy or other places.
Q: What are the model numbers of our laser cutter
- The 80 Watt Laser is XYZ Technologies Exlas 1280, so is 1200mm x 800mm laserable.
- The 60 Watt Laser is a Tek Genius "60W 110V CO2 Laser Engraving Machine", or similar. No real model number that we know of.
Q: Is the laser certification I took x years ago still valid?
- Yes, and if you are not comfortable and need a refresher or help laser cutting then the monthly Laser Meetup is a good time to get re-acquainted.
Q: I took the certification for the 80W Laser in the past, but not the 60W Laser. Do I need to re-take the certification?
- No, but you will need to get acquainted with the differences. The Laser Meetup is a good time to come learn about the differences.
Q: When is the next laser certification class?
- There is a laser certification on the 3rd Sunday every Month from 11am-2pm. Check the calendar and sign up early because it does fill up.
Materials and Cut Settings
Q: What materials can I cut or engrave with the laser?
- The Laser Material Guidelines wiki page aims to cover that.
- There is also a growing collection of samples in the Laser Example Book. Please help us make this book more useful.
Q: Can I engrave metal with the laser?
NO! You cannot engrave, cut or etch metal with the HeatSync Labs c02 laser. Some online reports claim to have methods of cutting stainless steel with a c02 laser using a special coating to assist absorption. We don't allow attempting to cut metal (engrave, etch, or whatever term you prefer) with the lab c02 laser cutters. We recommend people experiment with their own laser cutters if they chose to explore those options. That way they are responsible for replacement of their own lenses and mirrors. We have enough wear and tear on the machines with the current use cases. More would not be desirable.
You can laser engrave coatings off of metals. Coatings like acrylic paint, anodized layers. Things that will absorb the infrared laser. Just be cautious about power settings so the laser isn't reflecting back up damaging the lens.
Q: What size material can I cut with the laser?
Q: How thick of material can I cut?
- This largely depends on the material. See the laser logs for the 80W, and 60W for examples of what people cut. It lists the dimensions.
Q: I'm at 100% for power and not cutting through; Should I use 2 passes to cut through my material or change my settings to go slower?
- Typically you'll want to go slower. If you do multiple passes there may be debris left in the cut, and it may misaligned if heat causes warping to your material or anything else causes movement of the material.
Q: Is the MDF from Home Depot/Lowe's good enough or is there a better place to get MDF?
- Big box stores will have the price advantage because of volume. Sourcing and quality are super subjective, so its up to you. An art store like Jerry's may have finer stuff but you will pay a premium.
Q: How finely can I engrave with the lasers?
- If you are asking about how fine the line or kerf of the laser is; In my experience the 80W laser is 0.125mm or larger if out of focus due to height or warping. The 60W laser provides a finer point much closer to .1mm. (summarized Robert Douglas Slack response).
Q: Where do you buy materials?
- Most of your major online retailers.
- Port Plastics is local in Chandler. There is a minimum order amount.
- Houston Acrylic has a good selection of specialty acrylics.
- Laser Bits now owned by Johnson's plastic has a variety of materials.
Q: Where can I buy materials locally
- Lumber shops will probably have higher quality than your big box hardware stores
- Timber Hardwoods has good Baltic Birch Plywood that is usually better quality.
- Woodworkers Source has a location in Chandler
- Port Plastics in Chandler for acrylic
Q: Any issues cutting 1/4" walnut on the laser?
- Should work fine. May require slower cutting and higher temperatures on the 80W laser. May present more of a challenge on the 60W.
Q: Why are my parts getting burn marks on them?
- If your parts are small and falling after cut it may result in them getting burnt as other parts are cut above where they ended up.
Q: Why doesn't anything happen when pressing xy, or z to move the laser.
- Press the Download button to regain communications. You can close the window.
Q: How do I make the laser go to a specific place on the laser bed?
- LightBurn has a setting called absolute coordinates, the other option is current position.
- LaserCut has a similar setting labelled immediate. Uncheck that for absolute coordinates.
Q: Why doesn't the laser start my job or run the box and instead beeps 10 times?
- Check the control panel and see if it says soft stop. If that happened it means the job was going to cut out of bounds so it terminated the job.
- Look at your options for origin point, and if immediate was checked or not.
Q: Why did the laser start cutting as soon as I shut the lid.
- This is a known problem. When you press pause on the LaserCut 5.3 software then open the lid it starts for some reason.
Q: What order is my design going to cut in?
- The software will go from top to bottom in your layers (colors) for any that are set to output. Within those elements it will probably try to cut things that are near each other. Preview or simulate are going to show you more about what order things are happening in without actually cutting the job.
Q: Is there a rotary attachment?
- Yes for the 80 W laser and it does require special training to use. Post on Slack asking to get help using it once have some experience using the 80 W laser.
Q: Can you vary power during an engrave? OR Can you engrave at different depths / Can you do a gray scale engrave?
- Engraving gradients is done by dithering an image and Lightburn has some nice settings features for engraving images, but the laser power isn't adjusting. You can create separate engrave layers and cut them at different powers, but no true variable power cuts.
Q: I'm getting a "soft dog" error when trying to use LaserCut 5.3.
- This is a known error with communication to the software dongle. Usually just trying a second time communicates successfully. If it continues please log your problems and also you may need to restart the software and or the laser/computer.
Q: Why is there so much smoke in the laser? Why is there smoke coming out of the laser
- The vent screen may be clogged (see below for photo example)
- Cleaning the duct work may be necessary to improve airflow. Please discuss with the station champions if you want to help with this.
- It may not be cutting very well and leading to excess smoke.
- Your material may just be a very smokey material.
- You may have covered too much of the laser bed with a large sheet of material leaving no room for air to flow down into the vent.
- In this case as holes get cut it may vent better.
- It may be a combination of multiple things.
Q: What does this error on the 60 Watt Laser mean: "Water error Work Paused"?
- This may just be the lid being open when someone tried starting the laser, or the chiller having an error. The laser has 2 lid switches one tells the software to pause. The other is tied into the same interrupt circuit as chiller interrupt. If the chiller gives an error it will turn off power to the laser tube.
Q: Can I start a job directly from USB?
- Extra No. The 80W laser includes a button that crashes the bed into the laser cone. Do not use the control panel other than the escape button.
- The 60W doesn't have auto focus / z-datum, but you could accidentally change settings via the control panel. Just use the control panel to move the position, but don't adjust any settings. Just avoid using the menus via the control panel.
Q: What types of files do I need?
- LaserCut5.3 (80 Watt Laser) takes .dxf format.
- In Adobe Illustrator to export a dxf go to the menu File, Export, Export As and choose DXF 2000.
- Newer versions of DXF may pose problems. In Inkscape you can save as DXFR12 or DXFR14 one or both should work.
- Lighburn (60 Watt Laser) takes various file types; Vector / mixed formats .ai, .svg, .dxf, .pdf, .plt, .hpgl. Image formats: .png, .jpg / .jpeg, .bmp, .gif, .tif / .tiff.
Q: "Why are some parts of my design missing when I convert to dxf for Lasercut?
- Often those elements were not paths, but objects like basic shapes or fonts. Convert those objects to paths so they can be converted.
- Also grouped items may not be converted to paths when saving as .dxf
Q: My file imports with lots of segments of lines and curves that aren't connected. How do I make them all connected.
- For LaserCut 5.3 you use the Tools menu then Unite Lines.
- For Lightburn you use Edit Auto-Join Selected Shapes.
Q: Is it better to use a raster image to engrave or to use a vector?
- This answer highly depends on the artwork in question. For images with gradients engraving in LightBurn works great. For black and white designs one reason to change to vector may be time. Engraving a clock face for instance will result in a lot of travel between the numbers that isn't cutting. If they are all separate layers it'll go quicker. Alternately in Lightburn you may try the "Offset Fill" option especially for thinner fonts. Functionally there should be no difference with a black and white image engrave of high enough quality so it really is only a matter of time.
Q: Why is the text in my file coming up wrong.
- Possibly the font that you used is not on the laser computer. You may need to convert the font to a path before importing it.
Q: Why does my design come in with the wrong dimensions (didn't scale correctly)?
- This depends on how your design software assigns units of measurement which is outside the scope of this FAQ. However you can resolve most if not all of these problems by checking the total size of your design then scaling it once you bring it into the laser software.
- For LaserCut5.3 you can go to Edit Size to adjust your design size.
- For Lightburn the top bar has the size and you can adjust it there.
Q: I have lines that extend beyond the boundaries of the document. If I were to upload that file onto either of the laser cutting software, will the software include the lines that are outside the boundary?
- Yes. Neither LaserCut 5.3 or Lightburn will care about what your page size is. Everything outside your page will still import.
Q: How do I make the lines in my design import into LaserCut 5.3 or LightBurn.
- You can set the color of your path strokes to be the colors within LaserCut 5.3 or LightBurn.
- Import this file to use the dropper tool within your application.
Q: Is there a place where I should save my project file?
- The U: Drive is for user folders. Create a folder with your name and put copies of your work in there. Good idea to back them up somewhere else also.
Q: Where is the isopropyl (rubbing alcohol)?
- On the table in the wood box unless someone moved it. There is more in the admin lockers. Ask whoever is hosting if you need help getting something from the lockers.
Q: Do we need to clean the honeycomb / screen?
- No. Cleaning will be necessary and testing is pending on the best way to clean it, but you only need to clean the rails, cone, and bed under the rails after each use.