Power control of a stone cutting machine having cutting chains
AssigneeMachinenfabrik Korfmann GmbH
InventorHorst Weisner
Life of this patent
Estimating the term…
Abstract
In a stone cutting machine having a cutting chain rotated by a motor and a separate power feed for the machine, the power consumption of the drive motor is monitored. When the power consumption falls below a minimum, a control signal is generated to increase the feed, and when the power consumption exceeds a fixed maximum, a control signal is generated to decrease the feed. In generating the control signal, the power consumption is scanned only over a pre-determined period, which for power consumption beneath the minimum is approximately twice as long as for the power consumption above the maximum.
Claims4
A process for cutting stone, comprising the steps of:
- feeding a cutting machine forwardly on a guide frame at a feed rate;
- cutting the stone by means of a rotating stone cutting chain guided on a cutting arm and driven by an electromotor;
- producing an electrical control value X correlated to the power fluctuation of the electromotor within a limited scanning period T;
- producing an actual elongation signal correlated to the feed rate;
- comparing the actual electrical signal with the electrical value X and producing a feed rate adjustment signal Y correlated to such comparison;
- adjusting the feed rate according to the feed rate adjustment signal Y;
- and
- conducting the above-mentioned steps so that the scanning period T in the case of a power fluctuation below the fixed minimum value is approximately twice as long as the scanning period T in the case of a power fluctuation exceeding the fixed maximum value for the power consumption of the electro-motor.
Dependencies are inferred from the claim text.