nightline
Member
Gents,
I've to program a new machine which has a flying knife, but I've no idea how start this.
We have an extruder which makes a plastic strip.
This strip must be cut in lenghts between 9 and 18 inch.
The system will get a Kinetix 6500 servo system with 3 axis.
Axis-1 is a servo motor which pulls the plastic strip trough a water bad, and feeds it to the cutter station.
Axis-2 is a linear thruster which has a cutter-head, and has to follow the strip on line-speed, cut the strip, and move back for cutting the next strip.
Axis-3 is a servo motor on the cutter-head to activate the knife.
The encoder of Axis-1 is the reference for the strip lenght.
So Axis-2 has to follow this reference signal, to be on the same speed, but also on the right position to activate Axis-3 and cut the strip.
My problem is, how should I program this?
It's not difficult to start Axis-2 at the lenght signal, and also the speed is not a problem. But Axis 2 has an accelaration time, and during this time the strip moves forward. So Axis-2 should start earlier, or should move quicker to find to cutting-point. and follow the line-speed till the cut is done..
For you're information: the line speed is about 45 mtr. per minute.
The PLC will be a L27-ERM, and communicate over EthernetIP with the Kinetix 6500. Programming is in ladder.
Any idea is welkom, thanks in advance!
Jack
I've to program a new machine which has a flying knife, but I've no idea how start this.
We have an extruder which makes a plastic strip.
This strip must be cut in lenghts between 9 and 18 inch.
The system will get a Kinetix 6500 servo system with 3 axis.
Axis-1 is a servo motor which pulls the plastic strip trough a water bad, and feeds it to the cutter station.
Axis-2 is a linear thruster which has a cutter-head, and has to follow the strip on line-speed, cut the strip, and move back for cutting the next strip.
Axis-3 is a servo motor on the cutter-head to activate the knife.
The encoder of Axis-1 is the reference for the strip lenght.
So Axis-2 has to follow this reference signal, to be on the same speed, but also on the right position to activate Axis-3 and cut the strip.
My problem is, how should I program this?
It's not difficult to start Axis-2 at the lenght signal, and also the speed is not a problem. But Axis 2 has an accelaration time, and during this time the strip moves forward. So Axis-2 should start earlier, or should move quicker to find to cutting-point. and follow the line-speed till the cut is done..
For you're information: the line speed is about 45 mtr. per minute.
The PLC will be a L27-ERM, and communicate over EthernetIP with the Kinetix 6500. Programming is in ladder.
Any idea is welkom, thanks in advance!
Jack