JPS5577923A - Controller for conveying table for steel material - Google Patents

Abstract

PURPOSE: To stop the steel material at the controlled position accurately, by taking in the factor of variation deciding the friction factor of the steel material to be conveyed on the steel material conveying table for every steel material as the control signal, and by making the slow down of the conveying table to be variable.

CONSTITUTION: The conveyed steel material passes the front table 20 and is detected by the position detector at the reference counting position P, and the pulse of the pulse generator installed in the conveying table is taken into the subtraction counter which then starts the counting. Hereupon, the steel material is set at the standard position as shown by the figure (b), in order to set the slow down starting point l₀. However, because the general steel material possesses the size, shape, and temperature different from those of the standars steel material, the friction factor is also different; therefore, the deviation of those variables from the standard values are taken in as the correction ±α for the slow down starting point previously obtained for the table, in order to change the slow down starting point; and the slow down gradient is made variable as shown by the figure (c); hereby, the accuracy of the stop position is improved.

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