I have an ABB IRB6400R s4c on a 14 metre track, I have attached a spindle to it to work as a CNC machine. I have been creating programs for the robot with a cad software and everything works, however im having problems with the robot not moving the correct set distances. over the distance of 10 metres it loses 15 mm. so when I tell it to move 10 meters it only moves 9985 mm. and this is causing problems with the robot cutting in the wrong places.
What would be causing this? and is there anything to fix it?