Machine tool and control procedure

摘要

A machine tool has a tool retainer for retaining a tool, a motor and a drivetrain which couples the motor with the tool retainer for transmitting a torque. A system pushbutton is coupled with a motor control. When the system pushbutton is activated by a user, the motor control controls the motor in such a way that the motor turns in a first sense of rotation for a duration and then in a sense of rotation opposed to the first sense of rotation. The duration is shorter than 100 ms.

主权项

1. A control process for machine tool which includes a motor coupled to rotate a tool and a system pushbutton for controlling operation of the motor, comprising:
upon actuation of the pushbutton, initially rotating the motor in a first rotational direction that is opposite a functional direction of the tool for a predetermined duration of not more than 100 ms; and thereafter, if the pushbutton continues to be actuated, automatically turning the motor in a second rotational direction which is opposite the first rotational direction and corresponds to the tool's functional directionwherein the actuation of the system pushbutton defines a rotational speed of the motor and turning in the first sense of rotation only occurs if the motor is idle or the rotational speed is lower than a threshold value.