4. Motion Control Instructions When master axis is in relative mode, master position in cam curve = (master position 0 + master offset 0) / master scaling 1 = 0. From cam curve, slave position is 0 when master position is 0. Calculation method: f (0) = 0. When slave axis is in relative mode, slave position= 0* slave scaling 1 = 0 When slave axis is in relative mode as well as any start-up mode, its actual position at point B is 227 and the corresponding position in the cam curve is 0. And so the coordinate of the meshing point B is (144, 227). When master axis moves, following master axis, slave axis starts to move from point B according to C2 curve. 9.
Explanation of relation between scaling and offset The same formula reflects the relation between scaling and offset as below. Slave position = f [(master position + master offset)/ master scaling]* slave scaling + slave offset When the axis is in absolute mode, Master Offset or Slave Offset is valid but must not be negative value; when the axis is in relative mode, offset parameter is invalid. The scaling parameter is not affected by the absolute/ relative mode of master and slave axis.
Master scaling =1, slave scaling = 1, master offset = 0, slave offset = 0 360 Slave Position 180 60 Master Position 360 Suppose cam is planned as above figure, master and slave scaling are both 1, offsets are 0, the cam curve will not make any change. DVP-MC operating manual 4-71