Velleman K8200 (or 3Drag) is 3d printer type with many users and with developed upgrade ecosystem. Here is a detailed guide on how to upgrade it into desktop CNC mill / drill machine ideal for PCB milling with simple alterations and attachments to basic model machine. Mill is usually a Dremel or similar multitool.
Detailed guide with all the steps and softwarecan be found at:
http://www.open-electronics.org/how-to-transform-your-3drag-3d-printer-in-a-cnc-milling-machine/
YT user under alias DCM made similar DIY modification to his Velleman K8200 making it into CNC mill and drill with air cleaning and here is video and forum post demonstrating it:
http://forum.velleman.eu/viewtopic.php?f=53&t=10292
