For "Dual head" in most cases there is used specific software that drives the machine. These kind of RIP software is not made by Summa. In most cases they are used to make patterns for textile industry.
When you want to use WinPlot to drive the dual head than make sure to use 2 colors in your design to be able to address the "Extra Pen":
When a dual head is installed, “red lines” have 2 functions:
1/ cutting tool is set on EXTRA PEN => plotting is done with extra pen, red lines are done with tangential knife in FlexCut mode
2/ cutting tool is set to TANGENTIAL KNIFE => cutting is done with tangential knife, red lines are plotted with extra pen.