mountainbikedude
Member
Hey all,
a little info on the project:
I have a VFD driven "buffer" roller in a printing press that is removed and replaced on a daily basis, the operator simply removes the old "buffer", puts the new one in and secures the lovejoy coupling that ties it to the motor. While the press is running this buffer turns the opposite way the web is travelling. apparently the operator forgot to attach the lovejoy couple to the motor and a lot of scrap material was ran. Now the plant manager wants me to come up with a way to tell if the buffer is running the right direction. I have to be able to tell that the buffer is physically turning so whatever I do has to be tied to the buffer.See .bmp for details
My solution is to attach two pieces of reflective tape at A and B on the buffer shaft and have the two photoeyes A and B look for the tape in a sequence to tell if the shaft is turning in the right direction.
The code would be such
Sensor A Sensor B B3:0/0
---] [-------------]/[--------------( L )
The shaft is 2 inches and will have a max rpm of 1600
My question involves scan time,would the AB micrologix 1200 be able to execute the this code quickly enough to know if the shaft is turning the right direction.
a little info on the project:
I have a VFD driven "buffer" roller in a printing press that is removed and replaced on a daily basis, the operator simply removes the old "buffer", puts the new one in and secures the lovejoy coupling that ties it to the motor. While the press is running this buffer turns the opposite way the web is travelling. apparently the operator forgot to attach the lovejoy couple to the motor and a lot of scrap material was ran. Now the plant manager wants me to come up with a way to tell if the buffer is running the right direction. I have to be able to tell that the buffer is physically turning so whatever I do has to be tied to the buffer.See .bmp for details
My solution is to attach two pieces of reflective tape at A and B on the buffer shaft and have the two photoeyes A and B look for the tape in a sequence to tell if the shaft is turning in the right direction.
The code would be such
Sensor A Sensor B B3:0/0
---] [-------------]/[--------------( L )
The shaft is 2 inches and will have a max rpm of 1600
My question involves scan time,would the AB micrologix 1200 be able to execute the this code quickly enough to know if the shaft is turning the right direction.