Bed size will be 34" x 24", this is the max size I can accommodate where it will be located.

X axis will have a stepper driven shaft running the width of the bed with a pulley at each end, a similar configuration will be at the other end of the bed using stub shafts perhaps. The two belts will be fixed to the lower section of the moving gantry.

Y axis will have the stepper and a couple of pulleys mounted on top of the gantry, belt will be attached in the area of the linear carriage.

These are my ideas at the moment, when I get the construction started then I will be able to appreciate the configuration better.