Control apparatus and method for preventing seizure in a spindle

Details Control apparatus and method for preventing seizure in a spindle Control apparatus and method for preventing seizure in a spindle

1988-08-03

1991-02-12

Teska, Kevin J.

Boots, shoes, and leggings

73660, 7386233, 364506, 364508, 36455101, G06F 1520

Patent

active

049929640

ABSTRACT:
A control device for a spindle apparatus including a spindle in a housing supported by bearings includes a sensor that senses the axial elongation of the spindle during rotation and outputs monitoring signals representing whether such an elongation exists. The monitored signals are compared and a variation value per unit time is calculated. A switching circuit receives the variation value and stops rotation of the spindle when the variation value is equal to or greater than a preset reference value by detecting abrupt elongation in the axial direction of the spindle immediately before seizure may happen and rapidly stopping rotation of the spindle to prevent seizure of the spindle.

REFERENCES:
patent: 3729991 (1973-05-01), Hardway, Jr.
patent: 3888116 (1975-06-01), Spinella
patent: 4270041 (1981-05-01), Pleyber
patent: 4446746 (1984-05-01), Aoshima et al.
patent: 4625291 (1986-11-01), Hermann
patent: 4637264 (1987-01-01), Takahashi et al.
patent: 4672566 (1987-06-01), Asano et al.

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