Help needed to design open source laser x-axis.

Looking to make a gantry similer to a Trotec speedy 300 laser engraver. This is very similer to a belt driven linear actuator/stage from compaines like bosch and Thomson. It a nice project as its isolating the rest of the laser design and just concetrating on producing a high speed linear stage. Speeds will hopefully be in the 200 Meters per Minute range

Any help and advice would be appreciated.

Gav