Rivet setting device

A rivet setting device comprising:

• an electric drive motor,
• at least one rivet setting means driven by said drive motor,
• at least one rechargeable battery for supplying power to said drive motor, and
• a circuit for controlling the power supply to said drive motor, said circuit comprising:
• a voltmeter for determining a voltage value of the battery,
• a comparator for comparing the determined voltage value with a minimum voltage value of the battery which is stored in a storage means of said circuit, wherein when said minimum voltage value is not reached before a rivet setting operation of said rivet setting means is performed the power supply to said drive motor can be interrupted with said circuit, further wherein when said minimum value is not reached during a rivet setting operation the power supply to said drive motor can be interrupted after the rivet setting operation has been completed,
• a microcomputer, wherein the storage means comprises a read-only memory connected to said microcomputer, and
• current flow limiter for limiting the current flow to a maximum value, wherein the maximum value is preferably adjustable by the operator, and further wherein the maximum value is adjustable in response to the maximally required pulling force for setting the rivet, and
• a switch for preselecting the maximum value, wherein the maximum value is adjustable in steps, and further wherein in a start phase of said drive motor a current supply can be limited by the circuit to at least one preset value.

A rivet setting device comprising:

• an electric drive motor,
• at least one rivet setting means driven by said drive motor,
• at least one rechargeable battery for supplying power to said drive motor, and
• a circuit for controlling the power supply to said drive motor, said circuit comprising:
• a voltmeter for determining a voltage value of the battery,
• a comparator for comparing the determined voltage value with a minimum voltage value of the battery which is stored in a storage means of said circuit, wherein when said minimum voltage value is not reached before a rivet setting operation of said rivet setting means is performed the power supply to said drive motor can be interrupted with said circuit, and further wherein when said minimum value is not reached during a rivet setting operation the power supply to said drive motor can be interrupted after the rivet setting operation has been completed, and
• a current flow limiter for limiting the current flow to a maximum value.

A rivet setting device comprising:

• an electric drive motor,
• at least one rivet setting means driven by said drive motor,
• at least one rechargeable battery for supplying power to said drive motor, and
• a circuit for controlling the power supply to said drive motor, said circuit comprising:
• a voltmeter for determining a voltage value of the battery,
• a comparator for comparing the determined voltage value with a minimum voltage value of the battery which is stored in a storage means of said circuit, wherein when said minimum voltage value is not reached before a rivet setting operation of said rivet setting means is performed the power supply to said drive motor can be interrupted with said circuit, further wherein when said minimum value is not reached during a rivet setting operation the power supply to said drive motor can be interrupted after the rivet setting operation has been completed, and further wherein in a start phase of said drive motor a current supply can be limited by the circuit to at least one preset value.