CONTROL OVER MOTOR FOR EXCLUSIVE USE IN LOOM AND APPARATUS THEREFOR

摘要

PROBLEM TO BE SOLVED: To avoid the defective weaving caused by a shift of an actual rotating angle of a loom from a virtual rotating angle when controlling the driving of a motor for exclusive use using a data of the virtual rotating angle. SOLUTION: A speed averaging circuit 32 is capable of calculating the average rotational speed of a loom, simultaneously producing a data of the virtual rotating angle for one rotation of the loom next time using the calculated average rotational speed and outputting the data to a rotation control circuit 33 which uses information about a shedding pattern for one rotation of the loom fed from a loom controlling computer Co and a data of a virtual rotating angle obtained from the speed averaging circuit 32, produces a virtual rotation control pattern and controls the driving of a shedding driving motor 24 so as to provide the virtual rotation control pattern. When a difference in rotating angle between the actual rotating angle and the virtual rotating angle exceeds a tolerance, a correction circuit 31 adds a correction to the rotating angle of the shedding driving motor 24 corresponding to the data of the virtual rotating angle.