Help Flying

Hi

CPU S7-1200 1217

You are asking about one of the most complex functions you can do, cut-to-length.

By your question, you are a beginner.  Siemens has a Flying Saw application.  You may want to start there.  But I suggest that you understand the basic dynamics of each step first.

If you do not understand the basic equations of motion, you will never understand how this works.  Start there.

For linear motion without rounding.

time to accelerate = desired velocity/acceleration

Distance traveled during acceleration = 0.5* acceleration * time **2.

Many people use camming to accomplish this.  I use gearing and have my own algorithms.

Hi

Master encoder speed (main supply) =50kHz for S7-1200

 Not with a standard PLC.  You have to synchronize 2 axis (line speed master and carriage), so this requires some sort of multi-axis motion controller.

I have seen some examples of this done in CU320 using DCC and also using a T-CPU, but they are too slow for my applications.  I've had the best luck with SIMOTION, although I'd like to try the DCC route when the CU320-3 comes out.

William_B

Jeff Casagrande

...one of the most complex functions you can do...

Jeff - would you do this application with a garden-variety PLC?
^{.. I like your idea with the dynamic adaptive gear ratio}