JPH0435849U

JPH0435849U -

Info

Publication number: JPH0435849U
Application number: JP7676090U
Authority: JP
Priority date: 1990-07-19
Filing date: 1990-07-19
Publication date: 1992-03-25

Description

[Brief explanation of the drawing]

第１図、第２図はこの考案の一実施例に係り、
第１図は工作機械の主軸駆動装置の零速度信号検
出に関する構成図、第２図はそのタイムチヤート
、第３図は従来の零速度信号検出に関する構成図
、第４図はそのタイムチヤートである。図において、１は数値制御装置、２は速度制御
回路、３は電力変換回路、４は主軸モータ、５は
速度検出器、６は零速度検出速度設定回路、７は
零速度検出用コンパレータ、８は零速度信号出力
回路、９は減速時零速度検出速度設定回路、１０
は減速時検出用コンパレータ、１１は論理和回路
である。なお、図中、同一符号は同一または相当
部分を示す。 Figures 1 and 2 relate to an embodiment of this invention,
Fig. 1 is a block diagram of the zero speed signal detection of the spindle drive of a machine tool, Fig. 2 is its time chart, Fig. 3 is a block diagram of the conventional zero speed signal detection, and Fig. 4 is its time chart. . In the figure, 1 is a numerical control device, 2 is a speed control circuit, 3 is a power conversion circuit, 4 is a spindle motor, 5 is a speed detector, 6 is a zero speed detection speed setting circuit, 7 is a comparator for zero speed detection, 8 9 is a zero speed signal output circuit, 9 is a zero speed detection speed setting circuit during deceleration, and 10 is a zero speed signal output circuit.
1 is a comparator for detecting deceleration, and 11 is an OR circuit. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

In the spindle drive device of a machine tool, which is equipped with a numerical control device, a spindle drive device, and a spindle motor, and controls operations such as starting and stopping the spindle motor based on a motor start command from the numerical control device, when the spindle motor decelerates, A spindle drive device for a machine tool, characterized in that it has two types of zero speed detection speeds for determining a zero speed detection speed as a normal motor stop, and a zero speed signal is obtained by the logical sum of the two.