(Refer to DLS3 horizontal axis of application example on page 6 - "X-Z transfer unit") The unit is required to lift a basket of components weighing 6kg. The cantilever axis is 600mm long and therefore weighs 6kg (see page 20) and the weight of the WG3 gearbox with 56L motor is 4.7kg (see page 9). In this design the center of mass of the basket and cantilever axis sits 40mm offset to the center of the carriage. In this application both axes accelerate and move "slowly" so that we can ignore inertial forces.The total mass on the main axis carriage is therefore 6 + 6 + 4.7 = 16.7kg, offset 40mm (= 0.04m) to the center of the carriage in the Mr direction. Li = 16.7 x g = 16.7 x 9.81 = 164N Mr = 164 x 0.04 = 6.6 Nm Entering these figures into the Lf equation above, we get Lf = 0.376. We can enter this figure into the life equation for the DLS3 as follows: 70 /(0.04 + 0.96 x 0.376)3 = 1080km linear life |