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Title: Machine tool fault indicator
Claims: What is claimed is: 1. A cylindrical grinder comprising a plurality of selectively displaceable machine mechanisms, means for sequentially operating said plurality of selectively displaceable machine mechanisms including a corresponding plurality of means for individually displacing each of said plurality of machine mechanisms from a predetermined first position as said plurality of machine mechanisms are sequentially operated, and means including signal generating means for selectively individually energizing said plurality of displacing means, a corresponding plurality of means for individually signaling the completion of the selective displacement of said plurality of machine mechanisms, and fault indicating means for identifying each and every one of said plurality of machine mechanisms which are not located at said predetermined first positions prior to the operation of said sequentially operating means comprising a corresponding plurality of fault signal generating means, means for sensing the presence of signals generated by each of said plurality of completion signaling means and for energizing the corresponding fault signal generating means when a signal is selectively either present or absent at each of said plurality of completion signaling means, and means for enabling said sequentially operating means if none of said plurality of fault signal generating means are energized by said sensing and energizing means. 2. A machine tool comprising a plurality of selectively displaceable machine mechanisms, means for sequentially operating said plurality of selectively displaceable machine mechanisms including a corresponding plurality of means for individually displacing each of said plurality of machine mechanisms from a predetermined first position as said plurality of machine mechanisms are sequentially operated, and means including signal generating means for selectively individually energizing said plurality of displacing means, a corresponding plurality of means for individually signaling the completion of the selective displacement of said plurality of machine mechanisms, and fault indicating means for identifying each and every one of said plurality of machine mechanisms which are not located at said predetermined first positions prior to the operation of said sequentially operating means comprising a corresponding plurality of fault signal generating means, means for sensing the presence of signals generated by each of said plurality of completion signaling means and for energizing the corresponding fault signal generating means when a signal is selectively either present or absent at each of said plurality of completion signaling means, and means for enabling said sequentially operating means if none of said plurality of fault signal generating means are energized by said sensing and energizing means. 3. A cylindrical grinder comprising a plurality of selectively displaceable machine mechanisms, means for sequentially operating said plurality of selectively displaceable machine mechanisms in a plurality of sequentially performed operating sequences each including the displacement of at least one of said machine mechanisms including a corresponding plurality of means for individually displacing said plurality of machine mechanisms, and means including signal generating means for selectively individually energizing aid plurality of displacing means, a corresponding plurality of signaling means individually associated with said plurality of machine mechanisms for signaling the completion of the selective displacement thereof, a corresponding plurality of fault indicators individually associated with said plurality of displacing means, a corresponding plurality of timer means set at predetermined times sufficient to permit the completion of said plurality of operating sequences, means for selectively energizing each of said plurality of timer means at the beginning of the associated operating sequence, means for resetting each of said plurality of timer means, if the associated operating sequence is completed prior to the timing out of said timer means, means for energizing the specific fault indicator associated with a selected machine mechanism, which failed to be selectively displaced to energize the signaling means associated therewith during one of said operating sequences when said associated timer means times out. 4. A cylindrical grinder according to claim 3, wherein said fault indicators comprise fault lights. 5. A cylindrical grinder according to claim 3, wherein said sequentially operating means comprises a programmable controller. 6. A cylindrical grinder according to claim 3, wherein each of said plurality of signalling means comprises a switch. 7. A machine tool comprising a plurality of selectively displaceable machine mechanisms, means for sequentially operating said plurality of selectively displaceable machine mechanisms in a plurality of sequentially performed operating sequences each including the displacement of at least one of said machine mechanisms including a corresponding plurality of means for individually displacing said plurality of machine mechanisms, and means including signal generating means for selectively individually energizing said plurality of displacing means, a corresponding plurality of signaling means individually associated with said plurality of machine mechanisms for signaling the completion of the selective displacement thereof, a corresponding plurality of fault indicators individually associated with said plurality of displacing means, a corresponding plurality of timer means set at predetermined times sufficient to permit the completion of said plurality of operating sequences, means for selectively energizing each of said plurality of timer means at the beginning of the associated operating sequence, means for resetting each of said plurality of timer means if the associated operating sequence is completed prior to the timing out of said timer means, means for energizing the specific fault indicator associated with a selected machine mechanism which failed to be selectively displaced to energize the signaling means associated therewith during one of said operating sequences when said associated timer means times out. 8. A machine tool according to claim 7, wherein said fault indicators comprise fault lights. 9. A machine tool according to claim 7, wherein said sequentially operating means comprises a programmable controller. 10. A machine tool according to claim 7, wherein each of said plurality of signaling means comprises a switch. 11. A cylindrical grinder according to claim 3, wherein at least one of said sequentially performed operating sequences includes the displacement of a plurality of said machine mechanisms and wherein the fault indicator energizing means associated with each of said at least one operating sequence includes a fault detection circuit associated with each of the plurality of machine mechanisms displaced in the operating sequence and operatively associated with a corresponding one of said plurality of fault indicators, each of said fault detection circuits having, means responsive to the presence or absence of at least one of the signals generated either by said signal generating means or said plurality of signaling means for indicating when a signal from a selected one of said plurality of signaling means should be present, means for sensing whether the signal from said one signaling means is present, and means for actuating said associated fault indicator when said responsive means indicates that the signal from said one signaling means should be present and no signal is sensed by said sensing means. 12. A cylindrical grinder according to claim 11, wherein a plurality of said sequentially performed operating sequences include the displacement of a plurality of said machine mechanisms. 13. A machine tool according to claim 7, wherein at least one of said sequentially performed operating sequences includes the displacement of a plurality of said machine mechanisms and wherein the fault indicator energizing means associated with each of said at least one operating sequence includes, a fault detection circuit associated with each of the plurality of machine mechanisms displaced in the operating sequence and operatively associated with a corresponding one of said plurality of fault indicators, each of said fault detection circuits having, means responsive to the presence or absence of at least one of the signals generated either by said signal generating means or said plurality of signaling means for indicating when a signal from a selected one of said plurality of signaling means should be present, means for sensing whether the signal from said one signaling means is present, and means for actuating said associated fault indicator when said responsive means indicates that the signal from said one signaling means should be present and no signal is sensed by said sensing means. 14. A machine tool according to claim 13, wherein a plurality of said sequentially performed operating sequences include the displacement of a plurality of said machine mechanisms. Other info: Inventors: Price, Ralph E. (Waynesboro, PA, US) Application Number: 497956 Filing Date: 1974-08-16 Publication_date: 1976-02-03 Assignee: Landis Tool Company (Waynesboro, PA) Primary Class(es): 451/9 451/249 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Whitehead, Harold D. Assistant Examiner: Attorney: Smith; Spencer T. |
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