Measurement method by numerical control device

Abstract

Disclosed is a measurement method performed by a numerical control device measurement apparatus having a device for computing and storing the difference between a number of feedback pulses, each of which is generated whenever a movable element moves by a predetermined amount, and a number of command pulses (P.sub.s) generated by a pulse distributor, a motor being controlled in such a manner that said difference approaches zero. Specifically, the measurement method includes counting, by the storage and computing means sensor pulses (MP) generated by a sensor, reading the counted value in the storage and computing device and applying the same to the pulse distributor as a command, computing and storing, by the storage and computing device, the difference between the number of sensor pulses (MP) and the number of distributed pulses (P.sub.s) generated by the pulse distributor, reading the content of the storage and computing device each time distributed pulses of a number equivalent to the counted value are generated and applying the read value to the pulse distributor as a command, and measuring the total number of sensor pulses by computing the total sum of the counted values read from the storage and computing device.

Dependencies are inferred from the claim text.