Collision preventive drive device for optical system

Details Collision preventive drive device for optical system Collision preventive drive device for optical system

1992-10-15

1993-10-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

318467, G01N 2186

Patent

active

052528375

ABSTRACT:
In a drive device for an optical system of which scanning is carried out by means of a motor controlled for drive and stop by availability and unavailability of the power supply, any collision of the optical system moving by its inertia with its surrounding devices is not permitted, and furthermore even in restarting after the power supply is stopped during action of image forming, any collision of the optical system with its surrounding devices is not permitted. When the optical system is located in an area outside from a timing switch and a return switch, the motor is controlled for reversal braking so as to quickly reverse the direction of moving, thereby causing the motor to be usually stopped when the optical system returns to the safety area.

REFERENCES:
patent: 4055023 (1977-10-01), Gatand et al.
patent: 4556832 (1985-12-01), Rollins

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