— according to the principle of operation, sheet models most of all resemble ordinary scissors. The material to be cut is placed between two knives, one of which is movable and the other is static. When transmitting torque from an electric motor, the movable cutting element performs reciprocating movements in a perpendicular plane, providing decent cutting accuracy along a straight path and with some types of shaped cutting. Sheet metal shears can only start from the edge of the sheet.
