Forum: Printers from other manufacturers
http://www.openprinting.org/printer_list.cgi?make=Encad
Try the dnj650c GhostScript driver.
dnj650c
If the plotter understand HP-GL/2, then it will probably work with the oce9050 GhostScript driver.http://www.openprinting.org/show_driver.cgi?driver=oce9050