"Short part" detector for automatic screw machine

Details "Short part" detector for automatic screw machine "Short part" detector for automatic screw machine

1997-09-17

1999-04-20

Elmore, Reba I.

Boots, shoes, and leggings

36446817, 36447402, 36447409, 36447417, 414 17, 414 18, 82126, 82127, 82124, G06F 1900, B23B 1300, B23B 522

Patent

active

058962964

ABSTRACT:
A simple wire probe is positioned between work stations of a multi-spindle automatic screw machine so that, when the spindles of the machine are indexed, the probe is contacted by the distal end of a properly-sized workpiece and a signal is sent to a conventional programmable logic controller ("PLC"). At the initiation of each cyclical indexing of the machine's spindles, an electronic timing "window" is opened in the PLC and, so long as the signal is received from the probe while the timing window is open, the PLC permits the machine's cyclical operations to continue. If, however, no signal is received during the preset time interval, indicating a "short part", the PLC is programmed to stop the machine drive and to provide a sensible indication (e.g., a flashing light) to call to the attention of the machine operator. The location of the probe does not limit the normal use or operation of any tool at any work station of the machine.

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