Back to results
US 5,825,150 AGranted
Method of detecting, diagnosing and automatically correcting abnormalities in servo control system
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsMitsuyasu Kachi, Kazuhiko Tsutsui
Life of this patent
Estimating the term…
Abstract
According to the present invention, in a first acceleration after power is turned ON, currents flowing through U-phase and V-phase of a servo motor output terminal are detected, and misconnection of the motor output terminal is detected by monitoring a pattern of the current wave form.
Claims2
A method of automatically correcting abnormalities in a servo control system for a servo motor comprising the steps of:
- determining whether or not a maximum current for a servo amplifier is being restricted;
- and
- clamping a maximum value of a speed command at a specified value only while said maximum current for said servo amplifier is being restricted.
A method of automatically correcting abnormalities in a servo control system for a servo motor comprising the steps of:
- determining whether or not a fast feed mode is being executed;
- determining whether or not a current instruction value has reached a current limit value;
- and
- suppressing a rate of change of a position instruction per unit time when said current instruction value reaches said current limit value during acceleration in said fast feed mode.
1 more element
Dependencies are inferred from the claim text.