The Flying Shear profile is broken down into many segments so each one is adjustable to minimize mechanical wear and tear on your machine. An adjustable knife fire position allows for  accurate cutting in the same location on your bed so the removable wear strip can absorb the impact instead of other parts that are costly to replace. If your bed doesn't have a wear strip, the cut spot can be set to automatically change its cut spot so you are not constantly cutting in the same area.
The Flying Saw profile is broken down into many segments so each one is adjustable to minimize mechanical wear and tear on your machine. An adjustable in sync position allows for accurate synchronization between the saw axis and  sync axis. The two axis are interlocked to ensure the saw blade is in the clear before the sync axis is committed to a retract move. This ensures the costly saw blade on your machine will be cutting for years to come.
The flying form and seal profile is broken down into many segments so each one is adjustable to minimize mechanical wear and tear on your machine. An adjustable in sync position allows for accurate synchronization between the mold and web. the sync distance is adjustable and is calculated in time not distance. Even though it is dwelling for distance in the down position, the time entered is back driven and used as a position and max speed clamp for the main line speed signal to the master upstream section. This is accomplished in one of two ways, The first being an analog signal back to a drive that is not under our control, the second being a synchronization network that links the master and sync axis's position loops and regulates the speed signal to the whole line using a virtual master
The profiled rotary knife is in itself not as complex as some make it. I have seen knives with 1000's of lines of code that do not work and I have written knifes with as little as 5 lines of code that work flawlessly every time. The complexity is not in the profile it is in the mystique of the application, once this has been removed the mathematics behind it are quite rudimentary. We have removed the "mystique" of this application and have come up with a canned solution that encompasses standard bed knife all the way to a complex helical (spiral) knife. a registration mark can be placed on the web for accurate cutting to a mark or it can run the same cut length for unprinted or not repeating requirements
Don't be fooled by other "Canned" software packages. If you need to modify your system to make thier product work. It's not a very good solution. We will modify our software package to fit your needs.

Working on a new style or
prototype? Let us know we can
work with you to quickly develop
the necessary algorithms to fit
your needs.
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485 Lincoln Dr
Suite 107
Twin Lakes, WI 53181
Main: (262)215-5335
Fax: (877)904-8712
The flying shear and profiled rotary knife applications in general are some of the simpler cut to length applications. Below you can see simulations of the various version of these applications. The synchronization to the web and decision to fire the knife have all been done before the web even begins to move. With our complex algorithm encapsulated in a simple module, complete with commissioning and tuning software, it is as simple as mounting the hardware and setting length. Press run and your back up in the game. Accuracies are dependant on the mechanical system being retrofitted, but with backlash compensation even the most tired machine can be made to compete with newer equipment. Whether your application is a pneumatically fired bar knife, servo driven cross cut, flying form and seal, or the complex rotary knife, the Sierra Automation Flying Shear software is your solution.
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Sierra Automation LLC
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