The transmission device of the invention successfully solves the mentioned drawbacks, having other advantages which will be described below. Therefore, there is an obvious need for a transmission device synchronizing the motor tube and the winder tube, which is simple and economical, can be used indiscriminately for the direct and inverse transmission thereof, and takes the amount of sheet material present in the winder tube into account for regulating the rotation speed of both tubes. Today said synchronization is achieved by means of complicated and costly transmission mechanisms which are provided with sensors and motors.ДЄnother drawback of the transmission mechanisms know today is that its direct or inverse transmission and change is complicated or impossible. In plotters, the motor tube feeding the sheet material to be printed and the winder tube where the already printed sheet material is wound must be synchronized to achieve the correct winding of the printed sheet material. The present invention relates to a transmission device for plotters, particularly for synchronizing the rotation of the motor tube feeding the sheet material to be printed with the rotation of the winder tube, on which the printed sheet material is wound, such that the tangential velocity of the uppermost layer of the reel of printed sheet material is equal to the tangential velocity of the motor tube. Transmission device according to claim 3, comprising a pair of shafts (4) located at the ends of the transmission device, in the opposite part with respect to said wheels (2, 3) for the assembly thereof as direct transmission or inverse transmission.

Transmission device according to claims 1 and 2, wherein said first wheel (2) is arranged at one end of said transmission device, and said pair of wheels (3) are arranged at the other end of said transmission device.Д¤. Transmission device according to claim 1, which also comprises a pair of freely rotating wheels (3) that are constrained to rotate together by contact, arranged between said motor tube (5) and said winder tube (6), one wheel of said pair of wheels (3) being in contact with said motor tube (5) and the other wheel of said pair of wheels (3) being in contact with said winder tube (6).ДЈ. Transmission device for plotters, characterized in that it comprises at least a freely rotating first wheel (2) arranged between the motor tube (5) and the winder tube (6) of a plotter, such that the rotation of the motor tube (5) is transmitted to said winder tube (6) through said freely rotating first wheel (2).Дў.

Tkt brain power plotter