A method and arrangement for detecting a wear limit or break in a cutting edge of a machine tool. At least two conductor paths are embedded in the cutting material forming the cutting edge, one of the conductor paths being part of a closed circuit while the other is part of an open circuit. A signal serving to break off the machining process is produced if either the conductor path disposed in the...

PURPOSE:To make an engine-torque changing control proper one suited to a traveling condition by carrying out the start of the change of engine torque by monitoring various sensors while making a backup control by means of a timer when said sensors are out of order. CONSTITUTION:Normally, the accomplishment of an engine-torque change starting condition is detected by the detecting means of a sensor...

PURPOSE:To operate the reengagement of an on/off clutch in a low speed condition and improve safety by bringing a stepless transmission under a disconnected condition of said on/off clutch, to a low speed condition corresponding to the position of a speed change lever in preference to the set value of deceleration. CONSTITUTION:When a clutch 14 is disconnected while traveling, a signal from a dete...

PURPOSE:To resume traveling at a decelerated speed corresponding to the position of a speed change lever by determining the deceleration set value which is controlled when a traveling clutch is disengaged, based on a detected value of speed when said traveling clutch is disconnected. CONSTITUTION:A detecting signal when a clutch 14 is disengaged by means of a clutch pedal 7 while traveling, is inp...