Adelaide Robot Combat 150g kit lifter

This was designed as for a kit 150g combat robot that was part of a giveaway competition held by Adelaide Robot Combat as part of Science Alive 2024. As it was designed as a kit bot it's very lightweight so it can fit non-optimal parts, like the rechargeable 9V battery shown in the picture.

Drive motors are N20s, and the lifter can either be powered by a higher reduction N20 (>100:1) or via a metal gear micro servo (ie the MG90S). Depending on the transmitter used a servo extender might also be needed to get the full 180 degree of movement needed to self-right. Wheels should be pololu 32mm or similar. Versions already built have used dual bushed motor ESCs, 3-in-1 ESCs with built in receivers (ie Malenki / Llamaforge ESCs), and/or DFRobot N20s with attached ESCs. It also has mounting holes for a sub miniature panel mount slide switch (19mm between mount holes), and a 3mm power LED.

For the kits all parts were printed in ABS. It's designed to use m3 bolts and m3 threaded nylon spacers to hold it together, although the power switches often need M2 bolts instead. There are two versions of the chassis - one with no holes in the base, and one with holes that line up with either of the charging port locations I've found on rechargeable 9V batteries.

For the N20 lifter version the holes in the lid need be tapped for m3 bolts, and there is the option to do the same on the lifter arm so as to use a grubscrew to hold it more securely onto the lifter motor. For the servo lifter version the holes in the servo should be tapped for M3, or can be drilled to 3mm and M3 nuts used instead. There is also a grabbing arm that can be used with the servo.