Gear cutting – milling – or planing – Milling – Cutter spindle or spindle support
Patent
1985-08-26
1986-12-30
Briggs, William R.
Gear cutting, milling, or planing
Milling
Cutter spindle or spindle support
408 9, B23Q 520, B23B 4704
Patent
active
046326120
ABSTRACT:
An apparatus for angularly orienting a machine tool spindle (24) to a keylock position includes a resolver (39) which is directly mounted on a shaft (13) of a spindle drive motor (12), the spindle (24) rotating synchronously with the shaft (13) through a shiftable gear train. Resolver (39) is connected to update a register (45) so that the count shown by the register indicates the angular position of shaft (13) with respect to the spindle head (11) as the shaft rotates. During synchronous rotation, a target (33) revolving with the spindle causes a proximity sensor (32) on the spindle head (11) to generate a pulse when the spindle (24) is in a known orientation relative to the spindle head (11). When a pulse occurs a data processing unit (46) of a numerical control circuit (42) compares the actual count in register (45) with a number of possible count values contained in a data storage table (44). Each of the stored register count corresponds to one of a number of angular orientations of spindle (24) with respect to shaft (13) which are possible when the spindle (24) and shaft (13) are engaged through the gear train. By noting the stored register count which is closest to the actual count, the orientation of the spindle (24) with respect to the shaft (13) is readily determined. Such data is then employed by numerical control (42) to orient the spindle in the keylock position.
REFERENCES:
patent: 3422724 (1969-01-01), Zankl et al.
patent: 3520228 (1970-07-01), Wohlfeil
patent: 3893371 (1975-07-01), Frazier
patent: 4220430 (1980-09-01), Meiser
patent: 4449866 (1984-05-01), Lohneiseld
Briggs William R.
Kearney & Trecker Corporation
Skarsten James O.
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