Power tool

A power tool for use with a working element, the power tool including:

• a power source;
• a first driven member for gripping the working element;
• a primary drive including a first motor and a gear assembly through which the first motor is connected to the first driven member, the gear assembly being adjustable to operate in a relatively high or relatively low gear;
• a shifter connected to the gear assembly and being operable to adjust the gear assembly between the relatively high or relatively low gear, the shifter having a second motor connected by an output shaft to a second driven member wherein the second driven member is connected to the gear assembly;
• a microcontroller connected to the second motor for controlling power supplied from the power source to the second motor;
• and
• a controller for providing user inputs to the microcontroller, including a relatively high gear switch and a relatively low gear switch through which the user selects the gear assembly to operate in the relatively high or relatively low gear via operation of the shifter.

A power tool for use with a working element including:

• a primary drive;
• a first driven member driven by the primary drive;
• a microcontroller controlling the level of current supplied to the primary drive means to control the level of torque supplied to the first driven member;
• the power tool being operable in either a working mode in which the first driven member is driven to enable a gripped working element to perform work, or an adjustment mode in which the first driven member alternatively grips or releases the working element;
• and
• a powered selector operable to switch the power tool to operate in either the working mode or the adjustment mode.

A microprocessor for use with a power tool for use with a working element, the power tool including:

• a power source;
• a first driven member for gripping the working element;
• a primary drive including a first motor and a gear assembly through which the motor is connected to the first driven member, the gear assembly being adjustable to operate in relatively high or relatively low gear;
• a shifter connected to the gear assembly and being operable to adjust the gear assembly between the relatively high or relatively low gear, the shifter having a second motor connected by an output shaft to a second driven member wherein the second driven member is connected to the gear assembly;
• and
• a controller including user input devices, the user input devices including a relatively high gear switch and a relatively low gear switch through which the user selects the gear assembly to operate in the relatively high or relatively low gear via operation of the shifter, the microprocessor including a processing unit and associated memory device for storing control logic to cause the microprocessor to:
• receive user inputs from the user input devices;
• and control power supplied from a power source to the second motor according to the received user inputs.

A microprocessor for use with a power tool for use with a working element, the power tool including:

• a primary drive;
• a first driven member for driven by the primary drive,
• the power tool being operable in either a working mode in which the first driven member is driven to enable a gripped working element to perform work or an adjustment mode in which the first driven member alternatively grips or releases the working element;
• and
• a powered selector operable to switch the power tool to operate in either the working mode or the adjustment mode, the microprocessor including a processing unit and associated memory device for storing control logic to cause the microprocessor to:
• receive a first user input from a controller representative of user selection of the adjustment mode or the working mode;
• and
• control the powered selector to cause the power tool to operate in the selected mode.