Abstract: A heavy-duty dust extractor (100, 200, 300, 400, 500, 600) comprising a dust separator (110), wherein the heavy-duty dust extractor is arranged to be supported on a ground surface (101) by one or more support members (150, 160), where one or more load sensors (210, 220) are arranged in connection to the one or more support members (150, 160) to measure a load on the one or more support members (150, 160), the dust extractor comprising a control unit (170, 900) arranged to receive data indicative of the load measured by the one or more load sensors (210, 220), where the control unit (170, 900) comprises means for measuring time, where the control unit (170, 900) is arranged to determine a dust extraction rate (740) in terms of a weight of extracted dust per unit of time based on the received data, and to control an operation of the heavy-duty dust extractor based on the determined dust extraction rate.

Abstract: A drive arrangement for driving a planetary head of a floor surfacing machine, the drive arrangement comprising; a first drive wheel arranged to be driven by a first motor, a second drive wheel fixedly attached to the planetary head and arranged to be driven by the first drive wheel via a connecting member, wherein the drive arrangement comprises a protective casing arranged to enclose the first and second drive wheels, and the connecting member, thereby protecting the drive arrangement from dust, debris, and slurry.