Spindle control system
AssigneeFujitsu Fanuc Limited
InventorHidetsugu Komiya
Life of this patent
Estimating the term…
Abstract
A spindle control system which is provided with a first motor for rotating a spindle, a second motor for positioning the spindle, a pulse generator for generating pulses proportional in number to the rotational angle of the spindle, a counter for counting the pulses from the pulse generator in order to detect the rotational position of the spindle, and circuitry response to the counter means to control positioning of the spindle by the second motor.
Claims7
A spindle control system for a spindle control arrangement including a first motor for driving a spindle and a second motor for positioning the spindle, comprising:
- first clutch means for selectively coupling the first motor with the spindle;
- second clutch means for selectively coupling the second motor with the spindle;
- a pulse generator coupled with the spindle for generating pulses proportional in number to the rotational angle of the spindle;
- counter means for counting the pulses from the pulse generator to detect the rotational position of the spindle;
- and
- means responsive to the counter means for controlling the rotational positioning of the spindle by the second motor via the second clutch means with the first clutch means disconnected.
A spindle control system for a machine tool having a first motor for driving a spindle during turning operations and a second motor for rotating said spindle to a predetermined angular position during positioning operations, comprising:
- first clutch means for selectively coupling the first motor with the spindle during turning operations;
- second clutch means for selectively coupling the second motor with the spindle during positioning operations;
- first means coupled with said spindle during both turning and positioning operations for generating feedback pulses at predetermined fractions of a revolution of said spindle and reset pulses once per revolution of said spindle;
- second means connected to said first means for counting said feedback pulses, said second means being reset by said reset pulses;
- third means connected to said second means for receiving the content of said second means after said spindle has been stopped at an arbitrary angular position;
- fourth means for storing a predetermined angular position value corresponding to an integral number of said predetermined fractions of a revolution of said spindle;
- and
- fifth means connected to said third and fourth means for energizing said second motor to rotate said spindle via said second clutch means to said predetermined angular position.
Dependencies are inferred from the claim text.