Numerical control device

Details Numerical control device Numerical control device

2006-12-12

2006-12-12

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

C318S600000, C318S601000, C318S604000

Reexamination Certificate

active

07148647

ABSTRACT:
An analog amplifier performs control of a motor at the speed in proportion to a speed instruction (analog voltage) outputted from a numerical control device. The speed instruction (analog value) is converted into a digital value by an A/D converter and is then sent to a CPU. When the CPU judges that the received digital value corresponding to the speed instruction deviates from a predetermined range, the CPU stops sending out an enable signal, and sends out an emergency stop signal. As a result, the CPU stops electric power supply to the analog amplifier, and also invalidates the speed instruction sent to the analog amplifier20, thereby performing control to make the speed of the motor become “0”.

REFERENCES:
patent: 4310878 (1982-01-01), Hyatt
patent: 5285378 (1994-02-01), Matsumoto
patent: 6566836 (2003-05-01), Matsubara et al.
patent: 6628097 (2003-09-01), Endo et al.
patent: 6956505 (2005-10-01), Taniguchi et al.
patent: 6961637 (2005-11-01), Scherer
patent: 2004/0207357 (2004-10-01), Aoyama et al.

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