Disclosed is an automatic roll paper feeder that has no switch on its face to be operated by a user and includes a sensor that reads the user starting or ceasing to pull out paper from the roll by monitoring movement of the paper. The imaging sensor creates an image signal by photographing a subject. The tool also has measurement markings and reference points that can be used for positioning the tool in a desired location. The clamping device has a passage for a laser beam and a cutting gas, which passage defines a working zone, disrupts the longitudinal groove and runs parallel thereto. The system may be programmed to assess whether electricity generated by the system can be or should be transmitted to a public grid or stored locally on a chargeable battery system. The top of the support rod is slidably positioned within the socket member.