Patent ID: 11857384
Assignee: DENTSPLY SIRONA INC.
Field: Medical technology (Instruments)
Classification: CPC A  H | IPC A  H

Claim 4:
5. The method according to claim 1, wherein prior to applying tool of the handpiece to the tooth to generate the load, the electric motor is turned on with an initial speed equal to an idle speed, the idle speed being a preset value,
wherein a no-load motor current corresponding to the idle speed is obtained as part of a startup calibration of the motor driven dental handpiece that zeroes out the motor current generated by a drive system friction of the motor driven dental handpiece, and
wherein responsive to applying the tool of the handpiece to the tooth to generate to the load, the increasing or decreasing of the speed in response to increasing or decreasing load respectively is performed automatically within a defined speed range.