4. Motion Control Instructions Calculation of the coordinate of the key point in the corresponding cam curve Current position (30, 180), module is 360 and thus the point corresponding to the cam curve is (30, 180), i.e. point A in the figure. The corresponding point position in cam curve can be calculated via the following formula. Slave position = f [(master position + master offset) / master scaling] * slave scaling + slave offset Calculation of slave position: Master position in the cam curve = (master position 30 + master offset 30) / master scaling 2 = 30 From cam curve, slave position is 30 when master position is 30. Calculation method: f (30) = 30.
Slave position= 30* slave scaling 2 + slave offset 30 =90 Therefore, the coordinate of the first point is (30, 90), i.e. point B in the figure after “MC_CamIn” is executed. While master axis is moving, slave axis will cyclically follow master axis to move according to the cam curve with pint B as the starting point. Actual master and slave position corresponding to the terminal point of cam curve Actual master position: From step 2, master position need move 330 from position 30 to complete one cam cycle. Since master scaling is 2, actually master axis need move another 660 from current position, i.e. 30+660=690.
From step 2, f (30) =30, therefore slave axis need move 330 so as to reach max. value. Since slave scaling is 2, actually slave axis need move another 660 from current position before reaching the max. value, i.e. 90+660=750. Actual slave position: Since slave scaling is 2, the difference between max. and min. of actual slave position is 360*2=720 and the actual slave position corresponding to terminal point of cam curve is 750-720=30. Therefore, the axis position corresponding to terminal point is (690, 30). Curve figure for actual motion: Slave Position 750 180 90 30 0 30 690 1050 1410 330 Master Position 4-76 DVP-MC operating manual A B A B