Patent ID: 11931850
Assignee: COSTA LEVIGATRICI S.P.A.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 17:
18. A sanding machine, comprising:
(a) a support and transport plane for forwarding workpieces to be processed;
(b) a frame which supports at least one belt sanding unit, wherein
(b-1) the sanding unit comprises an abrasive belt which extends, and during operation, rotates transversally, with respect to a feed direction of said support and transport plane,
(b-2) inside said abrasive belt is arranged a pressure pad which is arranged with an inclination with respect to the extent of said abrasive belt and which is suitable to press the belt against the workpiece to be processed; wherein said pressure pad is divided into a plurality of pressure elements which are actuated individually;

wherein said sanding machine further comprises:
(v) a control beam comprising a series of sensors, at least one sensor for each pressure element of the pressure pad wherein said control beam is arranged parallel to said abrasive belt; and
(vi) a control unit adapted to control the operation of the single pressure elements on information received from the sensors compensates different distances between each sensor and a corresponding pressure element across a working width, and wherein
the compensation for unequal distances between each sensor and the corresponding pressure element along the working width is directly determined by distance measuring devices by measuring the distance between each sensor and the pressure element.