| 摘要 |
A scrapping machine for positioning a strapping material around an associat ed load and sealing the strapping material to itself around the load includes a frame., a chute defining a strap path that is mounted to the frame, and a feed assembl y mounted to the frame. The feed assembly is configured to operate in a feed mode to feed the strapping material and to operate in a take-up mode to retract the strapping material. A strapping head is configured to seal the strapping material to itself. A controller is operably connected to the feed assembly and controls the operation of the strapping machine. A sensor is disposed to sense the presence and absence of strapping material at the strapping head. The sensor includes first and second movable elements cooperating with one another and movable between a first position in which t he sensor senses the presence of strapping material and a second position in which the sensor senses the absence of strapping material. The sensor is operably connected to the controller such that the sensor senses the absence of strapping material at the strapping head and generates a signal to initiate operation of the feed assembly in a refeed mode.
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