Mill control
AssigneeLoewy Robertson Engineering Company Limited
InventorGeoffrey Houghton
Life of this patent
Estimating the term…
Abstract
The invention relates to a control system for setting the crown and/or steer on the rolls of a cluster mill such that the adjustment collars are all driven together but substantially in the desired final ratio to one another throughout the movement. The control system derives a separate control signal for driving each eccentric collar. The circuits for deriving the control signals include means for deriving from crown and steer magnitude signals, a series of crown and steer datum signals, one for each collar, which are proportional to the respective magnitude signals in selected ratios, the crown ratios being preselectable by a selection means and means for progressively increasing the magnitude signals from zero to the desired value.
Claims6
Control equipment for at least some of the eccentrically mounted collars of a cluster mill, comprising:
- (a) a control circuit for each said controlled collar for setting said collar to a determined displacement;
- (b) a control signal generating circuit for each said controlled collar;
- (c) means for generating a first magnitude signal proportional to a desired crown magnitude;
- (d) means for generating from said first magnitude signal a series of crown datum signals, one for each said controlled collar, said series of crown datum signals being proportional to said first magnitude signal in a preselected ratio;
- (e) selection means for preselecting said ratio;
- (f) means for supplying a position signal representing the displacement of each said controlled collar;
- (g) each of said control signal generating circuits being connected to receive an associated one of said crown datum signals and a corresponding position signal;
- (h) whereby each said control signal is dependent on the difference between its said position signal and the associated crown datum signal.
Dependencies are inferred from the claim text.