CONTROL SYSTEM FOR NUMERICALLY CONTROLLED GEAR SHAPING MACHINE TOOL Russian patent published in 1994 - IPC

FIELD: machine tool building. SUBSTANCE: control system has first and second pulse-type measuring transducers, mounted on a rammer and on an indexing table and joined respectively with first and second counters, whose outputs through first and second AND-gates are connected with inputs of a phase discriminator. An output of the phase discriminator is connected with an input of a summing amplifier, whose two other inputs are connected with outputs of first and second units for circular displacement of the indexing table. Inputs of both units for circular displacement are connected with an output of the first counter in such a way, that the first of the above mentioned units is directly joined with the above mentioned output and the second unit is connected with the output of the first counter through third AND-gate. A device for forming signal, controlling a circular displacement of the indexing table, is in the form of strain-gage bridge, whose outputs are connected with an input of a differential amplifier. An output of the differential amplifier is connected with a circuit, including connected in series analog switch, integrator, limiter, delay unit. An output of the delay unit is connected with the inputs of the first and the second AND-gates through NO-gate, and it is connected with an input of the third AND-gate. EFFECT: enhanced reliability of controlling. 1 cl, 2 dwg