We have a 28" USCutter MH721 vinyl cutter. It's used to cut adhesive-backed vinyl for stickers, sign making, and screen printing. It can also cut heat press vinyl for use with our vinyl heat press.
TuxPlot is the software used to control the vinyl cutter. The general workflow would be to design something in Inkscape, save it as an .svg, then import that svg in to TuxPlot where it's sent to the cutter.
At it's fundamental level, the vinyl cutter speaks HPGL. You can therefore sue Inkscape to create a vector image or convert a bitmap into a path Save as *.hpgl From the terminal, cat file.hpgl > /dev/usb/lp0
Converting bitmap to vector
Select the object, then choose Path > trace bitmap
Ask Adam for help.
wavy lines and not cutting through all of design: check that the white wheels are on the track. If not, see http://Www.USCutter.com/static/PDFs/carriage_off_track.pdf
Suggested parameters for vinyl are cut speed of 200mm/s and cut press of 200g.