초록 ▼

A deviation comparator (10) compares an output signal of a deviation detector (6) with a set limit value to anticipates a runaway, and if the runaway is judged thereby, an object unit (12) is isolated by a switch circuit (11), thereby to prevent destruction of a driving amplifier (9) and the object

A deviation comparator (10) compares an output signal of a deviation detector (6) with a set limit value to anticipates a runaway, and if the runaway is judged thereby, an object unit (12) is isolated by a switch circuit (11), thereby to prevent destruction of a driving amplifier (9) and the object unit (12).

대표청구항 ▼

A servo-controller comprising: a target-setting means for setting a target value for an object unit to be controlled; a position detecting means which produces a position feed-back signal by detecting the present value of said object unit; a deviation detecting means which produces a deviation signa

A servo-controller comprising: a target-setting means for setting a target value for an object unit to be controlled; a position detecting means which produces a position feed-back signal by detecting the present value of said object unit; a deviation detecting means which produces a deviation signal by comparing said position feed-back signal with said target value; a driving means for driving said object unit by utilizing said deviation signal as its control signal; a comparator for comparing said deviation signal with a predetermined set limit value, and for stopping operation of said driving means when said deviation signal is more than said predetermined set limit value; and a switch means responsive to said comparator for switching said driving means into ground level when said deviation signal is more than said predetermined set limit value.