JPH0297348U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a schematic block diagram showing a drive control device for a rotating machine for tension control according to an embodiment of this invention, Fig. 2 is a flowchart showing the operation of the embodiment, and Fig. 3 is a flowchart showing the operation of the embodiment.
The figure is a schematic block diagram showing a conventional drive control device for a rotating machine for tension control, Fig. 4 is an enlarged view of the fabric unwinding section, and Fig. 5 is a diagram of the motor when the fabric is broken in the conventional device. FIG. 3 is a characteristic diagram showing changes in rotational speed over time. In the figure, 1 is a motor, 2 is a web, 3 is a speed detector, 4 is a servo control means, 11 is a web breakage detection calculating section (control means), and 12 is an integration counter. Note that in the drawings, the same reference numerals and symbols indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A motor that transports a long member wound into a roll under a predetermined tension, an encoder that detects and outputs the number of rotational pulses of this motor, and an integration counter that counts the number of pulses output from this encoder. , a calculation means for calculating the winding diameter during operation from the count value, the thickness of the elongated member given in advance, and the winding diameter at the time of startup; 1. A drive control device for a rotating machine for tension control, comprising: control means for outputting a stop signal to the motor when the variation exceeds a predetermined value due to breakage.