A robotic mower including a chassis, a cutting motor driving at least one cutting blade, a height adjustment assembly and control circuitry. The height adjustment assembly comprises a height adjustment motor (140) configured to adjust a height of a motor bracket (100) via rotation of a height adjustment screw (136) driven by the height adjustment motor. The motor bracket provides structural support for the cutting motor at an adjustable level relative to the chassis. The control circuitry is configured to control operation of the height adjustment motor for positioning of the motor bracket based at least in part on information received by the control circuitry. The received information may be indicative of an amount of rotation of the height adjustment screw.
