Here is the second reduction gear assembly. The motor pinion has 13 teeth and the green nylatron has 72 teeth. This reduction is ~ 5.54. Total 5.54 X 2.88 = 15.9 : 1 .
Follow the line between the teeth, then straight back after the teeth until you get to the shaded area, then try to cut as close to the main skull as possible.
We decided that the standard motor on the QuadROSbot was not suitable for travelling over rough ground at slow speed - it was more suited to speed rather than torque. The motor chosen for the upgrade was a 3 phase 48 V DC motor with a 5:1 planetary gearbox...
List of parts to be 3D printed and the required hardware components A 90 teeth spur gear. This would mate directly with the Nautilus gear.A compound gear with 30 teeth to mate with the 90 teeth gear to get the factor of 3 reduction in speed.A second...
Using the coroplast sheet (18x24) cut out the roof for the microphone. Dimensions are shown in the image below.By the way, the teeth marks in the template are from a black bear that chewed up a microphone.
Mount all the back panel things to the back panel and add wires and connectors. 6 inch wires are plenty. Be careful about the polarity of the power jack and charge indicator LED.