I’ve had an Emblaser 1 and then an Emblaser 2 for almost 2 years, and I personally have found that if theres one thing that is certain, its that there is no definitive power or speed for any given material. When I first got the Emblaser 1 I just stuck stuff under it and went for it. Initially cardboard caught fire and plywood that looked cut through had no laser marks on the back when I turned it over, but it was all part of learning.
What I’d be doing because its what I did when I first got the E1 and hd never touched a laser before and had no idea what it was all about is to create a little test file in Inkscape - mine was just a small star shape down the bottom left corner, stick what you are planning to cut under the laser and just play around with the settings until its cut through but not ablaze.
To give you a start, here’s a basic set of parameters based on my materials and my laser -
for cutting, 3mm rubbish Bunnings ply will be 2 to 3 passes at 6mm/sec, but there’ll definitely be bits that aren’t cut through with Bunnings ply no matter how hard you try.
Better quality poplar or birch ply should be 2 passes at 6mm second.
Rule of thumb is add 2 more passes per mm, so 4mm ply will be 4 passes, unless its Bunnings in which case it could be an infinite number.
Basically with timber and thicker cardboard,after much mucking around, I’ve discovered that 100% power, 6mm/sec,is hard coded into my settings and I just change the number of passes until it cuts all the way through. That seems to be the happy medium basically,at the end of the day!
Thin stuff like 80 to 220 gsm papr and cardstock is generally one pass at around 12mm/sec, but again the colour can affect it - black card and paper is easier to cut than white.
Then theres engraving pictures…again the material dictates the settings, you do need to experiment, and accept that what works for one piece of ply or whatever, won’t necessarily work with a seemingly identical piece.
Rereading this it seems to come across as so negative, but in reality its just a learning thing. And the more you experiment the more you see how amazing a laser can be.
If you have any questions about a more specific material you are cutting or the software you are using, you’ll definitely get an answer if you post it here.,
Here, just to show the versability of the Emblaser , are a few things I’ve been mucking around with over the last 18 months, all done on either the Emblaser 1 or 2. All took experimentation and a bit of wasted materials, but the key is once you find the right setting, write it down!
2.5D Engraving on Huon pine using picengraver
Multiple layers of card to produce a gothic window (this is just a rough version but I have no other pics!)
Engraved brickwork and vector cut windows on a 4mm/ foot model building, brick size is 3mm by 1mm:
Laser cut veneers.