The programming example for the SIMATIC S7-1200 G2 PLC with TIA Portal V20 shows how to implement a Flying Saw application – “FlyingSawBasic”.
The application example provides a flying saw or flying punch on the controller platform SIMATIC S7-1200 G2. A continuous moving material (e.g. foil, metal, paper, corrugated, steel profiles, etc.) can be cut or punched on the fly. Functions: Automatic mode, immediate cut, cut to length or cutting mark, virtual or real master.
Material processing on the fly is necessary, if the process itself requires a certain time. Since the material movement shall not influence the material processing, the processing device need to move synchronous to the web.
Therefore the saw axis (following axis) synchronizes position based to the material (leading value). Once moving synchronous, the material processing is started (e.g. sawing, cutting, embossing, punching).
After the material processing step has been terminated, the processing device stops and usually returns to the start position.
The application example “FlyingSawBasic” provides a clear structured and ready-to-apply solution to realize a flying saw with SIMATIC S7-1200 G2.
The appropriate example project covers different areas of use. The programs can be used directly or adapted to own needs. The included HMI project can be used directly for test and simulation purposes or can be adapted to the user specific case of application.
The following functions are included
- Cut to length
- Cut to measuring input signal (cutting mark on the material). Any distance to measuring input, but signals are not buffered.
- Flying change of leading value real axis and external encoder
- Immediate cut
- Symetric synchronizing
- Dynamics for return movement are parameterizable or automatically calculated
- Cut and cut lenth counter
- Statistics of cut length measurement
- Automatic cutting mark search with automatic setting of active range
- Pull gap
- Dynamic shift of start position by user application
- HMI (commissioning/test interface)