| 摘要 |
The task of the invention comprises reliably acquiring documents from an output device with variable output speed without impermissible tractive forces being exerted onto the documents. For this purpose the rotational speed of the transport system of the acquisition unit is determined under no-load condition and the torque of the drive is reduced, for example by current imitation, until the transport rate of the acquisition unit is just above the maximum occurring transport rate of the output device. The torque value thus determined, which represents the torque requirement for overcoming the friction of the system, is stored and set as the nominal value during the document acquisition. As a drive motor can be used DC current motors as well as also load-controlled electronically commutated motors.
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