Positioning apparatus

A positioning apparatus, comprising:

• a motor for changing a position of a control object;
• a position detection circuit configured to detect a present position of the control object;
• a stop range setting circuit configured to determine a range of permissible positions around where the control object is desired to be stopped;
• a comparator circuit configured to compare an output from said position detection circuit with upper and lower limit values of the range determined by said stop range setting circuit to output an out-of-range signal and a drive direction indication signal for indicating a drive direction of said motor when the control object is out of the range;
• a driving continuing circuit configured to continue an outputting operation of a drive permission signal regardless of the out-of-range signal for at least a predetermined period of time from when the out-of-range signal is first output in an active state, and to stop the outputting operation of the drive permission signal on the basis of output in a passive state of the out-of-range signal after the [second] predetermined period of time has passed;
• and
• a drive circuit configured to drive said motor in a direction indicated by the drive direction indication signal while the drive permission signal is output.

A positioning apparatus, comprising:

• a motor for changing a position of a control object;
• a position detection circuit configured to detect a present position of the control object;
• a stop range setting circuit configured to determine a range of permissible positions around where the control object is desired to be stopped;
• a comparator circuit configured to compare an output from said position detection circuit with upper and lower limit values of the range determined by said stop range setting circuit to output an out-of-range signal and a drive direction indication signal for indicating a drive direction of said motor when the control object is out of the range;
• a drive condition determination circuit configured to output a drive permission signal when the out-of-range signal is continuously output in an active state for at least a first predetermined period of time, continuing an outputting operation of the drive permission signal regardless of the out-of-range signal for at least a second predetermined period of time from output start of the drive permission signal, and to stop the outputting operation of the drive permission signal on the basis of output in a passive state of the out-of-range signal after the second predetermined period of time has passed;
• and
• a drive circuit configured to drive said motor in a direction indicated by the drive direction indication signal while the drive permission signal is output.

A positioning apparatus, comprising:

• a motor for changing a position of a control object;
• a position detection circuit for detecting a present position of the control object and outputting a position signal;
• a stop range setting circuit for determining a range of permissible positions around where the control object is desired to be stopped;
• a comparator circuit for comparing the position signal from said position detection circuit with upper and lower limit values of the range determined by said stop range setting circuit, wherein said comparator circuit outputs an out-of-range signal and a rotational direction signal for indicating a rotational direction of said motor when the control object is outside of the range, and outputs a within-range signal and the rotational direction signal when the control object is within the range;
• a drive start determination circuit for outputting a drive permission signal when the out-of-range signal is output for a predetermined period of time and stopping an outputting operation of the drive permission signal when the within-range signal is output;
• and
• a drive circuit for driving said motor in a rotational direction indicated by the rotational direction signal while the drive permission signal is output.

A positioning apparatus, comprising:

• a motor for changing a position of a control object;
• a position detection circuit for detecting a present position of the control object and outputting a position signal;
• a stop range setting circuit for determining a range of permissible positions around where the control object is desired to be stopped;
• a comparator circuit for comparing the position signal from said position detection circuit with upper and lower limit values of the range determined by said stop range setting circuit, wherein said comparator circuit outputs an out-of-range signal and a rotational direction signal for indicating a rotational direction of said motor when the control object is outside of the range, and outputs a within-range signal and the rotational direction signal when the control object is within the range;
• a drive condition determination circuit for outputting a drive permission signal when the out-of-range signal is output for a first predetermined period of time, continuing an outputting operation of the drive permission signal for a second predetermined period of time starting from output of the drive permission signal, and stopping the outputting operation of the drive permission signal when the within-range signal is output after the second predetermined period of time has passed;
• and
• a drive circuit for driving said motor in a rotational direction indicated by the rotational direction signal while the drive permission signal is output.