Vibro or vibro peen part marking is typically created by a pneumatically actuated machine or device. Unlike dot peen – where the dot placement is controlled – with vibro or vibropeen marking, the dots are positioned based on velocity of the X/Y movement and oscillation of the stylus. Most vibro peen marks are contiguous line characters. Vibropeen marks can also be created on dot peen machines by creating contiguous dots that form a solid line and programming the interdot spacing.
Some specifications may refer to this method as Vibration Peen Mechanical or Vibro Peen Controlled.