| 摘要 |
<p>1,099,315. Programmed control of machines. LICENTIA PATENT-VERWALTUNGSG. m. b. H. May 21, 1965 [May 25, 1964], No.21644/65. Heading G3N. In a programmed numerical control system for machines, wherein a tool or workpiece is always moved in one direction while the tool is engaged, the reading from the program carrier of a word containing path or operational information is only effected after the termination of the executing of the previous instruction, the path instructions being stored in an input shift register and processed in an arithmetic unit with correction values, whilst operational instructions pass through the shift register and the arithmetic unit directly to stores that control associated control devices. As shown, a word recorded on a punched tape is read by a reader L5 and stored in a store PS. The word address is transferred to a store WAS through a decoding matrix EM while the word is fed to a shift register ES through a changeover device U. When the word relates to a distance instruction it is fed through line A where it is summated in an arithmetic unit RW with an offset correction from a selector switch Nx, Ny, Nz. The corrected position value is returned through a store RS and the device U to the shift register ES which acts as a store ZS. The corrected position value is then summated in unit RW with a tool offset value from a selector switch FR and returned to the store ZS through the device U. The final corrected position value is summated with an actual position value from angle decoders WKx, WKy, WKz to derive a control deviation signal which is fed to a sign store R comprising a self-holding relay. A feedmotor VM then operates in a direction determined by the contents of a store U under control of the control deviation held in a store V. Speed reduction for small deviations is effected through a matrix VAM, which at a small value of the control deviation signal, causes a switch over of motor VM to a slow zeroing speed. An operational address introduced into the word store WAS causes the associated information to be fed through the arithmetic unit RW directly to the spindle speed store U, the feedrate store V and auxiliary drive store H. Manual control is directly effected by selector switches HH, HR, HU, HV.</p> |
