Cutoff die set seat accelerator using rotary to linear motion converter

An operator for linearly moving product such as tubing comprising:

• a base having a bed;
• a die mechanism mounted on the bed for bidirectional travel along a path corresponding to the path of the product;
• a reversable motor;
• a threadless shaft connected to be rotated by said motor and extending along said base adjacent and parallel to the product path;
• a traveler mounted on and drivingly connected to said shaft so as to travel linearly therealong as said shaft is rotated and mechanically connected to the die mechanism to drive the die mechanism along the product path;
• means operative to allow slip in the driving connection between said traveler and said shaft in response to an overload condition associated with the die mechanism;
• means for generating a signal represeting the absolute longitudinal position of said traveler relative to said bed;
• and
• control means operative to control the rotation of said motor in response to said signal.