| 摘要 |
<p>PURPOSE:To accurately control the peripheral speed of a belt member by outputting a detection speed signal up to that time or a reference speed signal, instead of an erroneous detection speed signal caused by the joint of a belt member, by means of a signal replacing means. CONSTITUTION:The detection speed signal for showing the peripheral speed of the belt member 1 at that time, is outputted from the encoder of a speed detecting means 2. On the other hand, a joint pass signal for showing timing that the joint 16 of the belt member 1 passes a speed detecting roll 21, is outputted, from the timing calculating circuit of a joint detecting means 3. The signal replacing means outputs two signals made different according to the presence of the input of the joint pass signal to a data calculating circuit. In other words, when the joint pass signal is not inputted, the detection speed signal inputted from the encoder is outputted to the data calculating circuit, as it is. On the other hand, while the joint pass signal is inputted, the detection speed signal outputted until the joint pass signal is inputted, is continuously, outputted, as it is.</p> |
