X axis limited using Mega / ramps with Marlin

Hi all,

I have a cnc mill that I built several years ago and I have converted it to a 3d printer using a mega and ramps shield.

the bed on the printer is over 900mm in the x axis. with test code I have made the head travel the entire length.

However, when I make a manual move in repetier, or Gcode tells the head to move beyond 450mm, the head stops in the x axis.

repetier is setup for the 900mm distance, and I have searched through marlin for a limitation, but I can't find any.

does anyone have any ideas of why it is being limited and how I can fix this?

thanks.

Have you asked on the RepRap Forum ?

…R