My theory on this is that there is some sort of electrical noise or interference that is causing the loss of communication between the computer and laser cutter. Some people say a better USB cable helps. Some people find that switching the USB port helps. Why this happens for some people and not others I do not know. The timeouts error is an indication that the computer has lost its connection to the controller board. The driver installation procedure is located here:Īfter you have installed the LibUSB driver Laser Draw (LaserDRW) will not work unless you remove the LibUSB driver and reinstall the default driver. (Laser Draw uses the default driver.) In order to use K40 Whisperer you need to install the libUSB driver. The driver that K40 Whisperer uses to control the laser is different from the default driver that windows installs. Why do I get an error that says: 'USB Error: No backend available (libUSB driver not installed)'? This video is very helpful if you are just starting out Making a Design in Inkscape for K40 Whisperer To start an operation you need to click the 'Raster Engrave', 'Vector Engrave' or 'Vector Cut' button. You click it to pause a currently running job then you confirm if you want to stop the job or cancel to resume. It is a red Pause/Stop button that never changes color. Why is the 'Pause/Stop' button stuck on red? Some additional information on colors and text can be found here: To engrave a fill you need to use raster engrave. If the fill color is set to red or blue it will not result in vector features. Only Stroke features can be vector cut or vector engrave. Double check your colors if the items are not recognized.Ģ.

The colors can be incorrect by a value up to 9 so (246,9,9) will still register as vector cut. The color for vector engrave should be (0,0,255).

The color for vector cut should be (255,0,0) red=255, green=0 and blue=0. Generally there are two reasons that items are not recognized as vector items.ġ. Why is my design not recognized as vector cut or vector engrave?

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