Other

Sodick Co., Ltd.

Kanai School, Inc.

Kenji Yamada

Shuji Okazaki

Sadao Sano

Takahiro Nakamura

Kenzo Kanai

Yoshio Nakashima

Keisuke Hookabe

An electric discharge machining apparatus includes a first movable body ( ) movable along the Z axis, a ball screw ( ), a motor ( ) for causing rotation of the ball screw, a nut ( ), attached to the first movable body, threadingly engaging the ball screw, a second movable body ( ) movable along the Z axis relative to the first movable body, capable of having the tool electrode attached thereto, and a linear motor ( ) for moving the second movable body, for machining a workpiece by moving a tool electrode along a Z axis towards the workpiece while causing an electric discharge between the workpiece and the tool electrode. The linear motor includes a stator ( ) attached to the first movable body, and a mover ( ) attached to the second movable body. The first and second movable bodies include respective electrode attachment units ( ).

Apparatus for electrodischarge machining

The main spindle ( A) for the main spindle device of a diesinker electric discharge machine is connected to a high rotor inertia, high output servo motor ( ) without passing through a speed reducer; the servo motor ( ) is equipped with a high resolution encoder ( ). A main spindle rotation speed detection signal is detected by the encoder ( ) when the main spindle ( A) is rotating in the high speed mode, and a main spindle angle position and rotation speed detection signal are detected when the main spindle ( A) is being angle divided, and these signals are fed back to the servo motor ( ) motor driver ( ). High speed rotational control and angle position precision angle division control are accomplished by a single servo motor and a single encoder.

Spindle system for diesink type electric discharge machine

A method and apparatus for detecting a broken line up yarn, wherein a fine beam is adapted to travel widthwise across a row of line up yarns while it is radiated toward the yarns to cause flickerings which are photoelectrically converted to instantly count the current value for the number of yarns. The current value is compared with a standard threshold value, and if the current value is different from the threshold, an alarm signal is emitted indicating an abnormal condition. The present invention can be used as a broken yarn detecting technique for devices dealing with many line up yarns such as a warp knitting machine, a loom, a warping machine and so on.

Method of detecting a broken yarn in a row of line up yarns and

Growing community of inventors

Fukui, Japan

Kenji Yamada