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Home >> Technical Articles >>Optimized Control System Uses Off-the-Shelf PLC
Optimized Control System Uses Off-the-Shelf PLC
Time: 2008-12-24
     R&B Plastics Machinery LLC, Saline, Mich., has switched to an off-the-shelf PLC instead of dedicated motion-control cards to control closed-loop hydraulic motions of its injection-blow and extrusion blow molders. This is said to cut cycle time and reduce cost. The standard S-7 PLC from Siemens Energy & Automation Inc., Alpharetta, Ga., now integrates motion control into the PLC for faster machine performance. Dry-cycle time is up to 20% shorter. Cost is trimmed by eliminating motion-control cards and associated software. The PLC also integrates parison control, heater controls, and synchronized camming of blow pins with carriages.
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