REFERENCE POSITION SETTING METHOD OF WIDTH ADJUSTING DEVICE IN VERTICAL MILL

PURPOSE:To set simply and surely the reference position of a width adjusting device of a vertical mill, by storing the reference position of a center of vertical roll and resetting a counter at the time of moving the roll to display the roll center and a roll gap in the right values. CONSTITUTION:In a width adjusting device, the center position Lo of a vertical roll and the radius of it are respectively stored by digital switches 12 and 15 while a proximity switch 9 is turned ''on''. When the switch 9 detects the movement of a screw 3, its signal is transmitted from an AND circuit 10 to a roll- center-position counter 13 to reset the position of roll center. The roll center position is calculated basing on a signal which is obtained by detecting the number of revolutions of a motor and is transmitted from a pulse generator 8, and the signal of calculated result is respectively transmitted to a roll-center indicating device 14 and an arithmetic device 16. The roll gap is calculted by the device 16 to display it on a roll-gap indicating device 17. After stopping the vertical roll, the roll gap is measured to correct a preset value at need.