500kg Payload Compact Light Duty 7th Axis Robot Linear Track 0.05mm Accuracy The 500kg payload compact light duty 7th axis robot linear track is intended for smaller cells where a compact robot has to reach two or three stations along a line. A 500kg moving mass at up to 1.5m/s is enough for a light robot, its gripper and a small fixture, while repeat positioning accuracy of 0.05mm keeps the approach position identical at every stop. The rail can be anchored to a concrete