In the next step we prepare the holes for the rear side. Use again four M6 screws and the corresponding nuts and attach them between the right and left side of the chassis. If you already know that you want to use the use ultrasonic collision detection, then remove the remaining plastic from the prepared six holes. In the next step, we attach the left and right side to the bottom board and fix them with the four M6 screws Then we put two M6 nut bolts into the corners. It has the advantage to use the polished polished side of the bottom board downside that the grass sticks to it less well as to the matte side. Then we take the bottom board and attach the first aluminium corner. Otherwise the side boards will not fit into it. You have to see you remove all the remaining plastic from the notch in the bottom board. We start with the bottom, right and left board. We recommend to smooth all parts and remove all edges with a file and/or sand paper. This assembly instruction is work in progress! Case for NTRIP receiver module for GSPS variant of the Ardumower.Drill machine with drill set (3,4,6,8,10 mm drills).Building an Ardumower: chassis, motors, tires assembling (slow).Building an Ardumower: chassis, motors, tires assembling.Ardumower at Berlin Maker Faire 2019 (Source: 'hallo deutschland').Total energy consumption (average): 40W (60W peak, 7W idle).Integrated encoders, so it can measure the rotation speed and the distance.A high torque (2.45Nm) guarantees that the robot can climb small hills as well (with 2 motors, 0.125 radius wheel, 31rpm = 0.4m/s = 1.5 km/h, acceleration = 0.2 ( 1/2 of nominal speed) see calculator.A rotation speed up to 31 rpm allows to move the robot at sufficient speed (at up to meter/sec = 31rpm/60 * PI * 0.25m = 0.4m/sec using 250mm diameter wheels).

Gear motors: 2 x DC 24V planetary drive, 31 rpm, 2.45 Nm, 8mm shaft, with integrated encoders.Total weight: approx 9 kg (including all components - motors, battery, PCB etc.).Material: PE-HD plates (8mm) and alumnium profiles.

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