JPS6345559U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is an overall block diagram showing an embodiment of the present invention; FIGS. 2 to 4 are detailed configuration diagrams of a pulse generator that generates pulses in synchronization with the rotation of the CRG motor, PR motor, and TR motor; FIG. 5 is a detailed configuration diagram of the servo controller, FIG. 6 is a time chart for explaining the operation of one copy cycle, FIG. 7 is a time chart for explaining origin positioning control of the moving optical system, and FIG. The figure is a time chart for explaining the start-up positioning control of the photosensitive drum, FIG. 9 is a time chart for explaining the start-up positioning control of the transfer drum, and FIG. 10 is the start-up synchronization control of the moving optical system and the photosensitive drum. FIG. 11 is a time chart for explaining the transfer start point control of the transfer drum, and FIGS. 12 to 13 show abnormal phenomena in the pulse generators of the PR motor system and TR motor system. An abnormal phenomenon system diagram showing the cause, Figure 14 is a time chart to explain the abnormality detection operation of the PR motor and TR motor, and Figure 15 is a time chart to explain the abnormality detection operation of the signal synchronized with the rotation of the photosensitive drum. 16 is a time chart for explaining the operation of the entire section of the multicolor copying cycle, FIG. 17 is a flow chart for performing the abnormality detection operation of FIG. 15, and FIG. A time chart for explaining the abnormality detection operation of a signal synchronized with rotation, FIG. 19 is a flowchart for performing the abnormality detection operation of FIG. 18, and FIG. 20 is a circuit diagram showing the configuration of a motor synchronous compensator. , Fig. 21 is a time chart for explaining the abnormality detection operation when the motor is mechanically locked, Fig. 22 is a sectional view showing the positional relationship between the optical scanning mechanism and the stopper, and Fig. 23 is a copy mode and diagnosis. FIG. 24 is a state transition diagram showing the state transition of modes, FIG. 24 is a schematic configuration diagram showing the configuration of a conventional copying machine, and FIG. 25 is a perspective view showing the configuration of a movable part position control mechanism in the conventional copying machine. DESCRIPTION OF SYMBOLS 1... Photosensitive drum, 3... Charger, 4... Exposure section, 5C, 5Y, 5M... Developing machine, 6... Transfer drum, 8... Original mounting table, 9... Original scanning optical system, 11 ~14...Mirror, 15...Color separation filter device, 17...Gripper, 18...CRG motor, 19...Pulley, 20...Belt, 21...
PR motor, 22...TR motor, 23...servo controller, 24...master controller,
25...Serial data line, 26-28...
Pulse generator, 29...REG sensor, 30-3
1... Synchronous servo circuit, PO... Transfer point, IMO
...Latent image formation starting point, 60...TR sensor, 23
0...Synchronization compensator, 231...Up-down counter, 334...Microprocessor, 338...
...Serial data input/output port.

Claims (1)

[Claims for Utility Model Registration] An optical scanning mechanism that scans an image surface of a document; a photoreceptor that rotates in synchronization with the scanning of the optical scanning mechanism and forms an electrostatic latent image corresponding to the document image; A control device for a copying machine comprising: a developing means for developing the electrostatic latent image; and a transfer means that rotates in synchronization with the rotation of the photoreceptor and transfers the image developed by the developing means to recording paper. , a reference signal generating means for generating a reference signal serving as a reference for a transfer start position of the electrostatic latent image in synchronization with the rotation of the transfer means; pulse generating means for generating a corresponding pulse signal; measuring means for measuring the synchronization relationship between the reference signal and the pulse signal and the time interval between the reference signals; and whether the measured synchronization relationship and time interval are within a specified range. What is claimed is: 1. A control device for a copying machine, comprising: control means for determining whether or not a copying machine is present, and for stopping a copying operation if it is outside a specified range.