Patent ID: 7409036

Claim:
A dental panoramic X-ray apparatus, comprising: at least one arm, at least one of which includes an X-ray source and image detector unit of a dental panoramic X-ray apparatus; at least one power device having a rotating power output shaft; and a control device to control the power device, wherein the at least one arm is operatively connected to the power output shaft, the power device including a micro-stepping motor operatively connected to the power output shaft and configured to be controlled by the control device such that the power output shaft rotates in a micro-stepping mode, the power output shaft further configured to be operatively connected to the at least one arm, and to provide a ratio of a rotational speed of the power output shaft to a rotational speed of the at least one arm to be smaller than 20 and a continuous operating rotational speed of the power output shaft to be lower than 10 revolutions per second.