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Rover Sensor Bumper Plate
An L-bracket front bumper for the 'N20 4WD Skid-Steer Rover Base' kit. Its 16 x 60 x 4 mm base bolts to the chassis plate at (68, ±15) with M3x12 screws and nuts, sitting in 6 mm counterbores. The 60 x 40 x 4 mm face wall has a 5 x 3 grid of 3.4 mm M3 holes on a 10 mm pitch for mounting sensors, and two 3 x 8 mm zip-tie slots. It prints on its side so bumper impacts load along the layers, not across them.
Tilt Sensor Cradle Face
This is the lockable tilt head for the 'NEMA17 Geared Radar Scan Turret' kit. It is a 55 x 40 x 4 mm face plate with a 5 x 3 grid of 3.4 mm M3 holes at 10 mm pitch and two zip-tie slots at X ±24. The plate sits on two 34 mm deep side flanges that fit the yoke's 56 mm gap. Each flange takes two M3 brass heat-set inserts in 4.0 mm bores: one on the pivot axis and one 14 mm below it for the arc lock. Both bores have 9 mm thrust bosses and take M3x12 screws with washers. The flanges are 5 mm thick so the bosses keep the part 55.0 mm wide overall. Every point stays inside a 28 mm radius of the pivot.
Flexure-Isolated IMU Sensor Deck
A 70 x 70 x 6 mm frame that bolts to a robot chassis with four M3 screws on a 62 mm square. A 30 mm floating platform is held by four serpentine flexures that isolate an IMU or compass board from motor vibration. The platform has slotted M2.5 holes, so it fits 2-hole boards at 12–22 mm spacing and square patterns from 8.5 to 22.6 mm.
HC-SR04 Ultrasonic Bumper Mount
A front bumper bezel for the HC-SR04 ultrasonic sensor: the two 16 mm transducer cans press into 16.2 mm bores on 26 mm centres with 8 mm of engagement, so the board is held by the cans alone and no PCB hole pattern is needed (clone boards vary). Side shrouds protect the PCB and header, the 52.4 x 38 mm foot has two M3 clearance holes on 40 mm centres for a chassis deck plus two M5 clearance holes on 12 mm centres for 2020 T-nuts, and a rear arch takes a zip tie for cable strain relief. Overall 52.4 x 38 x 29 mm.