Study of the computing accuracy by using proba-bilistic approach

A spray machine can reciprocate a cantilevered support for a spray device with straight-line motion. The machine includes a pair of linked mechanisms, each including a rotating first shaft with a first arm fixed to it and including at the end of the arm a second rotating shaft with a second arm fixed to it. The second shafts are rotated hypocycloidally about the first shafts and swing linked ends of the second arms in a straight line. Spraying devices are movably cantilevered from the linked second arms so that they may be vertically positioned with respect to their support.