Most CNC routers should be able to cut carbon sheet in 1mm dead easily. PCB cutters work very well for this purpose and are cheap and easily sourced and replaced when they get blunt.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

I've been looking around for a CNC cutter/laser to cut out certain standard shapes. We mainly use xpreg XC 110 and XC 130 (unidirectional). I came across the CNC-step machines. On their site it says they can cut prepreg with an oscillating knive, but in reality it turns out there are some issues. Does anyone know of a system or manufacturer that allows CNC cutting of prepreg materials?

Rogier