Magnetic bearing spindle device for machine tools

Details Magnetic bearing spindle device for machine tools Magnetic bearing spindle device for machine tools

1997-07-15

1998-06-30

Briggs, William R.

Tool changing

With control means energized in response to activator...

310 905, 409231, 451342, 483 31, B23Q 3157, B23C 900, F16C 2300

Patent

active

057725640

ABSTRACT:
A magnetic spindle device for machine tools has a spindle contactlessly supportable by a plurality of controllable magnetic bearings for mounting thereon a tool element which is automatically changeable for a tool element of different kind. The spindle device comprises a device for measuring the weight of the tool element by measuring the exciting currents of the magnetic bearing, and a device for changing over the control characteristics of the magnetic bearings based on the measured weight of the tool element.

REFERENCES:
patent: 5027280 (1991-06-01), Ando et al.
patent: 5193953 (1993-03-01), Jesinger
patent: 5462470 (1995-10-01), Oda et al.
patent: 5562528 (1996-10-01), Ueyama et al.

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