A pusher divert with its trigger eye 1.20 m upstream and a 2780 ms delay in the program was diverting 97% of the 600 mm cartons and 61% of the 300 mm totes, and every tote it missed was hit on its back corner and spun onto the takeaway sideways. The 2780 ms was right … Read more
A 42EF retroreflective eye bolted 150 mm back from the discharge roller of a 1.5 m zone stops a 600 mm carton with 750 mm of zone still behind it, and stops a 1219 mm carton with 131 mm. Move the same eye to 50 mm from the discharge and the first carton overshoots into … Read more
A 1769-IQ16 takes 8 ms to see an input. Here is the counter module that will not, the quadrature arithmetic, and where the pulses actually get lost.
The warehouse system’s report for the night shift said 4,629 cartons sorted, 100% to the lane the order wanted, and the lane 2 pallet had 19 cartons on it that belonged in lane 3 and a picker who found them at 06:40. The sorter had no way to know. Its scanner read the label, its … Read more
Two PowerFlex 525s with 42.50 Hz on both keypads were running the takeaway at 0.500 m/s and the palletiser infeed it hands over to at 0.462 m/s, and every carton that crossed the transfer between them arrived 7.6% closer to the one in front than it had left. A 1219 mm carton that left the … Read more
A 1024 PPR encoder on the tail roller of an 8 m belt, read in X4 by a 5069-HSC2xOB4, gives 652 counts for every 50 mm of belt, and a shift register that moves one cell every 652 counts knows where a carton is to within one cell whether the belt is running at 0.500 … Read more
What a warper, a sizing line and a stenter need from a PLC: draw ratios, dancer and load cell loops, yarn break stops and recipes on S7-1500 or Logix.
The encoder is an electromechanical device that generates a digital (digital) pulse signal that generates signals in response to the motion of the motor shaft to which it is connected. It is also a sensing device that monitors the current positions of the connected shaft and provides feedback. The encoder sends a feedback signal that … Read more