Process for reducing the strength of an uncontrolled pointer movement
AssigneeMoto Meter GmbH
InventorsKlaus Hoffsommer, Roland Steger, Bernhard Herzog
Life of this patent
Estimating the term…
Abstract
A process for reducing the strength of an uncontrolled movement of a pointer driven by a stepper motor and abutting against a mechanical stop means when the stepper motor is switched off. Prior to the switch-off operation, the field strength of the magnetic field of the stepper motor is lowered, or the pointer is moved away from the stop means by a specified compensating angle of rotation. Alternatively, following the switch-off operation, the stepper motor is switched on again at least one time following a specified time span for a specified switch-on time span.
Claims16
A process for reducing the strength of an uncontrolled pointer movement, comprising the steps of:
- rotating a pointer with a rotor of a stepper motor to reach a mechanical stop;
- switching off the stepper motor for a predetermined switch-off time;
- only after the pointer contacts the mechanical stop and after the stepper motor is switched off, reducing a springing action of the pointer off of the mechanical stop by switching on the stepper motor for a predetermined switch-on time;
- and
- switching off the stepper motor after the predetermined switch-on time.
A process for reducing the strength of an uncontrolled pointer movement, a stepper motor driving a pointer via a rotor, comprising the steps of:
- only after the pointer contacts a mechanical stop, reducing a springing action of the pointer off of the mechanical stop by one of
- reducing a field strength of a magnetic field of the stepper motor acting on the rotor of the stepper motor to a predetermined value greater than zero, and
- rotating the rotor by a predetermined compensating angle of rotation;
- and
- switching off the stepper motor after the springing action is reduced.
Dependencies are inferred from the claim text.