![]() The pin loading capsule is electrically isolated from the carrier block and a slip-ring is provide on the machine spindle, allowing measurement of contact potential, via a Lunn-Furey circuit.Ī sliding contact thermocouple is used to sense disc temperature. Movement of the loading piston is measured with an LVDT as an indication of wear. ![]() Both steady and fluctuating loads can be applied. An in-line load cell measures the applied load and provides feedback for pneumatic load control. The test pin is inserted into a collet clamp on the loading piston. The pin carrier assembly can be rotated out of its locked horizontal position to allow access for changing specimens and examining the surfaces. ![]() ![]() The low rotational inertia of the carrier block about this axis ensures a good signal bandwidth for the friction measurement. A strain gauge load cell is mounted at the rear of the pin carrier block, preventing the block pivoting about its axis, hence sensing the friction force on the pin. ![]()
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