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Abstract
The paper presents recent explorations of polar crane parameters with the use of the latest geodetic electronic gauges, instead of conventional devices recommended by normative documents for measuring instruments. A set of basic geometric conditions for polar cranes was specified with required precision, namely: convergence of diagonals at the specified points, inside rolling radius of the wheels, lateral sliding of the wheels, longitudinal sliding of the wheels, position of wheels at a given radius, position of wheels at a given diameter, rolling radius of virtual wheels in small balancers, transverse slippage of bridge virtual wheels in small balancers. All basic parameters are shown not to surpass theoretical (design) parameters. The findings illustrate that the main operational characteristics of the polar crane explored herewith are permissible.
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