Screwdriver test bench
AssigneeScs Concept S.R.L.
InventorRoberto BOCCELLATO
Life of this patent
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Abstract
A test bench for screwdrivers comprises a hydraulic brake unit (11) provided with a coupling (12) for a screwdriver to be tested and angle and torque measurement transducers (15). The brake unit (11) is supplied by a proportional electrovalve (16) under the control of a PID controller (19) which receives an electrovalve control signal (22) from a control unit (26) so as to follow braking curves depending on the angle of rotation and/or torque measured. The bench comprises a memory (21) for storing different sets of parameters for the PID controller (19), which can be selected by the control unit (26) so as to have different control characteristics. A method for controlling the bench is also described.
Claims11
Test bench for screwdrivers comprising a hydraulic brake unit (1) provided with a coupling (12) for a screwdriver to be tested and angle and torque measurement transducers (15), the brake unit (1) being supplied by a proportional electrovalve (16) under the control of a PID controller (19) which receives an electrovalve control signal (22) from a control unit (26) so as to follow braking curves depending on the angle of rotation and/or torque measured, characterized in that it comprises a memory (21) for storing different sets of parameters for the PID controller (19), which can be selected by the control unit (26).
Method for controlling a test bench for screwdrivers comprising a hydraulic brake provided with a coupling for a screwdriver to be tested and angle and torque measurement transducers, the brake being supplied by a proportional electrovalve under the control of a PID controller, which receives an electrovalve control signal from a control unit so as to follow braking curves depending on the angle of rotation and/or the torque measured, characterized in that it comprises the steps of storing in an electronic memory of the bench a plurality of different sets of parameters for the PID controller and selecting and entering in the PID controller the parameters of a set of the plurality depending on the test to be performed and/or the screwdriver to be tested.
Dependencies are inferred from the claim text.