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#K40 laser engraver laserdrw full
Below is some ballpark numbers based on % of full power rather than indicated for my 40W Laser 100% for most cut operations 3-4mm/s 6mm Acrylic 5-6mm/sec for 4.5mm Acrylic 8-10 for 3mm Acrylic For Ply typically you can push 30% faster Balsa much faster again but I tend to drop the power too. So you will need to test a batch of materials to build up your own library. Power and speed settings vary from Laser to Laser so copying directly won't work.
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Assuming to have the current version always select the higher DPI. For some strange reason Inkscape saves slightly differently depending on how you save and they have lifted the default DPI setting in recent versions some files are ambiguous when you load them into Whisperer. Vector Engrave I don't use much but it is useful for workflow as you can do things like letters and scribe lines first. Save out as an SVG with the colours applied. There is a fill and stroke menu in Inkscape. Next you need to apply one of three Colours Red (vector cutting/outlines), Blue (vector engraving) or Black (Raster engraving). Import your DXF or vector graphic file and or convert your raster for engraving which is another whole art of DPI, Grayscale etc. Inkscape works well and is free for the next bit and K40 Whisperer needs it anyway. Fusion 360 and Mapboards does that and there is a few other options too. Cad file from weapon of choice into a DXF (preferable with a kerf allowance pre done). Workflow sort of runs like this with K40/M2 based Lasers.