Difference between revisions of "LC6090"
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− | | Left with an uneven bottom due to wood grain. scan gap 0.1 | + | | Left with an uneven bottom due to wood grain. Sticky due to sap. scan gap 0.1. Baby blocks are 300, 90, 0.1 engrave with cut diagonals of 200, 65 |
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| Acrylic | | Acrylic |
Revision as of 10:14, 6 September 2013
Contents
Training Required
The Laser Cutter is our first machine at the lab that we require training to operate. Please see one of our certified trainers. Training is provided at no cost to lab members.
Name | Contact | Certified By |
---|---|---|
David Hinkle | [email protected] | Fiat |
Mark Kruse | [email protected] | David Hinkle |
Ray Benge | [email protected] | David Hinkle |
Steve Hamer | [email protected] | David Hinkle |
Emergency Support and Maintenance
If there is a serious problem with the laser cutter, please inform David Hinkle at 309-314-5021 ([email protected]) or the mailing list. In order to better coordinate maintenance tasks, please do not repair any problems with the laser without contacting the support contact first. This is so that we can have a better understanding of the problems we're facing with the machine and it's history.
Critical Specifications
- Power: 80w
- Table Area: 900mm x 600mm
- Max Speed: 400mm/s (Unconfirmed)
Approved Materials
Some materials can damage the laser and be hazardous to human health when cut, and we're not talking about "ignore me because I'm just afraid you'll sue" hazardous, or "I care about you as a human being." hazardous. We're talking "Stop you fool or you'll kill us all!" hazardous. Here is a list of materials that won't kill us all, a list of materials that are dangerous, and a list of materials that are prohibited. This list is always up for debate on the mailing list. If you want to get something approved just post. Any of the approved trainers can update the list. They should only do so after researching the material in question and reviewing the MSDS (Material Safety Data Sheet)
Name | Approver | Notes |
---|---|---|
Acrylic | David Hinkle | Bad smell, probably not real good to breath. Will give you a headache. |
Leather | David Hinkle | This supposedly works great |
Buna-N Rubber | David Hinkle | |
Wood | David Hinkle | Watch out for fires! |
Paper | David Hinkle | |
Cardboard | David Hinkle | |
Painted Copper Clad | David Hinkle | Laser works well to etch off a matt black paint layer for acid etching. |
Name | Cautioner | Reason |
---|---|---|
Polystyrene Foam | David Hinkle | Reports on internet of very poor cutting and dangerous levels of flammability. Reported as the number one cause of laser fires. |
Name | Disapproved by | Reason |
---|---|---|
Metal | David Hinkle | Backreflections may cause damage. Waiting on response from manufacturer. |
Copper Clad | David Hinkle | It is possible to cut copper clad circuit board material but the results are extremely poor. You may use the laser to remove a layer of paint from the copper for etching, however. |
Neoprene Rubber | David Hinkle | People on internet indicate burning releases chlorine gas. Review of MSDS seems to support. |
PVC | David Hinkle | Emits lots of chlorine gas during cutting. Very hazardous to machine and operator. |
Other makerspaces also maintain lists of laser safe material. Please link them here. These lists can be valuable but we don't know these guys, so don't assume that something on their safe list is on our safe list... But it's certainly a good place to start to get it put on our safe list. These wiki's also often contain lots of good information about speeds, power, and experiences with various materials.
Lasercut5.3 software
- Install the software and USB drivers from QC Co-Lab dropbox account.
You have to have the blue USB cord connected and the laser cutter on to use the software. You might be able to continue using it after unplugging the blue usb connection, but no guarentees. The software is buggy and might require restarts or replugging in of the USB connection. If the software refuses to delete the download, restart the software. You can either design simple text/patterns directly in the lsercut5.3 software, or you can use a more powerful or easier to use program (such as Adobe Illustrator, Inkscape, Autocad, etc) and IMPORT the design in the following file types:
- PLT - HPGL Plotter file
- AI - Adobe Illustrator (be sure not to save with compression)
- DXF - Autocad
- DST - Tajima
- BMP - Windows Bitmap
- NC - Mastercam
- JPG
- JPEG
- GIF
- PNG
- TIF
- TIFF
- TGA
- PCX
It is possible to convert any image you find to black and white (with dithering for better resolution) and import it into the software. If you want to do multiple types of cutting operations (ie: 1. raster etch to a certain level, 2. etch to a deeper level, 3. cut around the outside) you need to assign them to different layers and adjust the speed and power
Manufacturer Speeds and Feeds
This should be called Power and Feeds, but speeds and feeds has a better ring to it.
Material | Thickness | Speed | Power |
---|---|---|---|
Acrylic | 5mm/.197" | 15 | 90 |
Acrylic | 10mm/.394" | 5 | 90 |
Acrylic | 15mm/.591" | 3 | 90 |
Acrylic | 20mm/.787" | 3 | 95 |
Wood | 1mm/.039" | 50 | 90 |
Wood | 5mm/.197" | 20 | 90 |
Wood | 10mm/.394" | 10 | 90 |
Wood | 12mm/.472" | 8 | 95 |
Leather | 1mm/.039" | 30 | 90 |
Leather | 2mm/.079" | 20 | 90 |
Leather | 3mm/.118" | 15 | 95 |
Rubber | 1mm/.034" | 15 | 90 |
Rubber | 2mm/.079" | 12 | 90 |
Rubber | 3mm/.118" | 6 | 90 |
Rubber | 4mm/.157" | 8 | 95 |
Member Recomendation Speeds and Feeds
Please list your great results or not so great results here so people can use them as starting points for their own projects.
Material | Process | Thickness | Speed | Power | Kerf | Recommended by | Notes |
---|---|---|---|---|---|---|---|
Buna-N Rubber | Engraving Stamps | 0.25" | 150 | 100 | NR | David Hinkle | This rubber seems to take lots of power at slow speeds really well. I got excellent results with about 1/8" inch relief at this setting with a .05mm scan gap. |
Buna-N Rubber | Cutting Gaskets | 0.63"/1.5mm | 400 | 30 | NR | David Hinkle | Pretty good gasket. |
Plywood | Engraving Sign | .5" | 400 | 75 | NR | David Hinkle | Plywood isn't the best for signs, the laser tends to blow through one or more layers and expose a glue layer underneath. Solid wood is better. This setting provided .065" relief. Dark lettering. |
Plywood | Cutting | 0.5" | 10 | 100 | NR | David Hinkle | Reliably cut through. Edges are black but not quite charcoal. |
Plywood | Cutting | 0.5" | 10 | 100 | NR | David Hinkle | Reliably cut through. Edges are black but not quite charcoal. |
Balsa Wood | Cutting | 7/8" | 70 | 60 | NR | Sarah Haubrich | Could go faster or less power. Used corner power 10 |
Pine wood (2x4") | Deep Vector Engrave/Cutting | ~1/4" | 50 | 90 | NR | Sarah Haubrich | The sap smoked a lot and came to the surface. corner power 15 |
Pine wood (2x4") | Engrave | 1/8" | 150 | 90 | NR | Sarah Haubrich | Left with an uneven bottom due to wood grain. Sticky due to sap. scan gap 0.1. Baby blocks are 300, 90, 0.1 engrave with cut diagonals of 200, 65 |
Acrylic | Cutting | 2.86mm | 40 | 100 | NR | David Hinkle | Reliable cut, clean flame polished edges. |
Acrylic | Cutting | 5.86mm | 12 | 100 | .22mm | David Hinkle | Used 75% Corner power for funzies. |
Acrylic | Vector Engraving | NA | 100 | 20 | NA | David Hinkle | |
Acrylic | Countersink Screw Holes | NA | 150 | 100 | NA | David Hinkle | As a raster engrave to countersink my 3mm screw heads. Used a 6mm circle. |
Hard Board | Cutting | 5.5mm | 10 | 100 | David Hinkle | Will cut as fast as 20, but won't cut consistently across the entire table at that speed. Has a better edge though. |
Manufacturer Docs
Manufacturer documentation can be found in the QC Co-Lab dropbox in the Gweiki folder.
Advanced Topics
Training Outline
This outline is meant to help the trainers remember everything they need to cover.
- Hardware
- Talk about the water chiller: Cools laser with cold water.
- Talk about the air assist pump: Pumps air through nozzle, removes smoke from path of laser and prevents fire.
- Talk about the ventilation system
- Point out Laser Tube. It's CO2 and the laser is invisible.
- Following path of laser to work material. Point out all three 3 mirrors.
- Show and talk about the lens
- Demonstrate moving table and talk about laser focusing and hourglass shape of beam
- Point out red focusing laser and mention that it's not the main laser, but only a positioning aid.
- Safety
- Talk about emergency stop
- Talk about how dangerous it is to operate the laser with any of the panels open
- Talk about chlorine gas and show user the approved material page on the wiki and how to access it
- Never operate the laser without the air assist to prevent fire
- Never leave laser unattended during operation
- Operation
- Student moves X,Y and Z axis
- Student zeros Z axis to focus the laser
- Software
- Provide the student with the software manual
- Demonstrate importing a DXF file
- Talk about cutting and engraving modes
- Talk about relationship of power vs speed
- Show student speed and feed table on the wiki
- Have student draw a figure and cut or etch the figure with the laser
- Talk about immediate mode
- Talk about DPI 254
- Demonstrate the simulator